/*
   * sysctl.c: General linux system control interface
   *
   * Begun 24 March 1995, Stephen Tweedie
   * Added /proc support, Dec 1995
   * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
   * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
   * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
   * Dynamic registration fixes, Stephen Tweedie.
   * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
   * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
   *  Horn.
   * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
   * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
   * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
   *  Wendling.
   * The list_for_each() macro wasn't appropriate for the sysctl loop.
   *  Removed it and replaced it with older style, 03/23/00, Bill Wendling
   */

  #include <linux/module.h>
  #include <linux/mm.h>
  #include <linux/swap.h>
  #include <linux/slab.h>
  #include <linux/sysctl.h>
  #include <linux/proc_fs.h>

  #include <linux/security.h>

  #include <linux/ctype.h>
  #include <linux/utsname.h>

  #include <linux/kmemcheck.h>

  #include <linux/smp_lock.h>

  #include <linux/fs.h>

  #include <linux/init.h>
  #include <linux/kernel.h>

  #include <linux/kobject.h>

  #include <linux/net.h>

  #include <linux/sysrq.h>
  #include <linux/highuid.h>
  #include <linux/writeback.h>
  #include <linux/hugetlb.h>

  #include <linux/initrd.h>

  #include <linux/key.h>

  #include <linux/times.h>
  #include <linux/limits.h>
  #include <linux/dcache.h>
  #include <linux/syscalls.h>

  #include <linux/vmstat.h>

  #include <linux/nfs_fs.h>
  #include <linux/acpi.h>

  #include <linux/reboot.h>

  #include <linux/ftrace.h>

  #include <linux/slow-work.h>

  #include <linux/perf_counter.h>

  
  #include <asm/uaccess.h>
  #include <asm/processor.h>

  #ifdef CONFIG_X86
  #include <asm/nmi.h>

  #include <asm/stacktrace.h>

  #include <asm/io.h>

  #endif

  static int deprecated_sysctl_warning(struct __sysctl_args *args);

  #if defined(CONFIG_SYSCTL)
  
  /* External variables not in a header file. */
  extern int C_A_D;

  extern int print_fatal_signals;

  extern int sysctl_overcommit_memory;
  extern int sysctl_overcommit_ratio;

  extern int sysctl_panic_on_oom;

  extern int sysctl_oom_kill_allocating_task;

  extern int sysctl_oom_dump_tasks;

  extern int max_threads;

  extern int core_uses_pid;

  extern int suid_dumpable;

  extern char core_pattern[];

  extern int pid_max;
  extern int min_free_kbytes;

  extern int pid_max_min, pid_max_max;

  extern int sysctl_drop_caches;

  extern int percpu_pagelist_fraction;

  extern int compat_log;

  extern int latencytop_enabled;

  extern int sysctl_nr_open_min, sysctl_nr_open_max;

  #ifndef CONFIG_MMU
  extern int sysctl_nr_trim_pages;
  #endif

  #ifdef CONFIG_RCU_TORTURE_TEST
  extern int rcutorture_runnable;
  #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */

  /* Constants used for minimum and  maximum */

  #ifdef CONFIG_DETECT_SOFTLOCKUP

  static int sixty = 60;

  static int neg_one = -1;

  #endif

  static int zero;

  static int __maybe_unused one = 1;
  static int __maybe_unused two = 2;

  static unsigned long one_ul = 1;

  static int one_hundred = 100;

  /* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
  static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;

  /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
  static int maxolduid = 65535;
  static int minolduid;

  static int min_percpu_pagelist_fract = 8;

  
  static int ngroups_max = NGROUPS_MAX;

  #ifdef CONFIG_MODULES

  extern char modprobe_path[];

  extern int modules_disabled;

  #endif

  #ifdef CONFIG_CHR_DEV_SG
  extern int sg_big_buff;
  #endif

  #ifdef CONFIG_SPARC

  #include <asm/system.h>

  #endif

  #ifdef CONFIG_SPARC64
  extern int sysctl_tsb_ratio;
  #endif

  #ifdef __hppa__
  extern int pwrsw_enabled;
  extern int unaligned_enabled;
  #endif

  #ifdef CONFIG_S390

  #ifdef CONFIG_MATHEMU
  extern int sysctl_ieee_emulation_warnings;
  #endif
  extern int sysctl_userprocess_debug;

  extern int spin_retry;

  #endif

  #ifdef CONFIG_BSD_PROCESS_ACCT
  extern int acct_parm[];
  #endif

  #ifdef CONFIG_IA64
  extern int no_unaligned_warning;

  extern int unaligned_dump_stack;

  #endif

  #ifdef CONFIG_RT_MUTEXES
  extern int max_lock_depth;
  #endif

  #ifdef CONFIG_PROC_SYSCTL

  static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos);

  static int proc_taint(struct ctl_table *table, int write, struct file *filp,

  			       void __user *buffer, size_t *lenp, loff_t *ppos);

  #endif

  static struct ctl_table root_table[];

  static struct ctl_table_root sysctl_table_root;
  static struct ctl_table_header root_table_header = {

  	.count = 1,

  	.ctl_table = root_table,

  	.ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),

  	.root = &sysctl_table_root,

  	.set = &sysctl_table_root.default_set,

  };
  static struct ctl_table_root sysctl_table_root = {
  	.root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),

  	.default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),

  };

  static struct ctl_table kern_table[];
  static struct ctl_table vm_table[];
  static struct ctl_table fs_table[];
  static struct ctl_table debug_table[];
  static struct ctl_table dev_table[];
  extern struct ctl_table random_table[];

  #ifdef CONFIG_INOTIFY_USER

  extern struct ctl_table inotify_table[];

  #endif

  #ifdef CONFIG_EPOLL
  extern struct ctl_table epoll_table[];
  #endif

  
  #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
  int sysctl_legacy_va_layout;
  #endif

  extern int prove_locking;
  extern int lock_stat;

  /* The default sysctl tables: */

  static struct ctl_table root_table[] = {

  	{
  		.ctl_name	= CTL_KERN,
  		.procname	= "kernel",
  		.mode		= 0555,
  		.child		= kern_table,
  	},
  	{
  		.ctl_name	= CTL_VM,
  		.procname	= "vm",
  		.mode		= 0555,
  		.child		= vm_table,
  	},

  	{

  		.ctl_name	= CTL_FS,
  		.procname	= "fs",
  		.mode		= 0555,
  		.child		= fs_table,
  	},
  	{
  		.ctl_name	= CTL_DEBUG,
  		.procname	= "debug",
  		.mode		= 0555,
  		.child		= debug_table,
  	},
  	{
  		.ctl_name	= CTL_DEV,
  		.procname	= "dev",
  		.mode		= 0555,
  		.child		= dev_table,
  	},

  /*
   * NOTE: do not add new entries to this table unless you have read
   * Documentation/sysctl/ctl_unnumbered.txt
   */

  	{ .ctl_name = 0 }
  };

  #ifdef CONFIG_SCHED_DEBUG

  static int min_sched_granularity_ns = 100000;		/* 100 usecs */
  static int max_sched_granularity_ns = NSEC_PER_SEC;	/* 1 second */
  static int min_wakeup_granularity_ns;			/* 0 usecs */
  static int max_wakeup_granularity_ns = NSEC_PER_SEC;	/* 1 second */

  #endif

  static struct ctl_table kern_table[] = {

  #ifdef CONFIG_SCHED_DEBUG
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_min_granularity_ns",
  		.data		= &sysctl_sched_min_granularity,

  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,

  		.proc_handler	= &sched_nr_latency_handler,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &min_sched_granularity_ns,
  		.extra2		= &max_sched_granularity_ns,

  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_latency_ns",
  		.data		= &sysctl_sched_latency,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,

  		.proc_handler	= &sched_nr_latency_handler,

  		.strategy	= &sysctl_intvec,
  		.extra1		= &min_sched_granularity_ns,
  		.extra2		= &max_sched_granularity_ns,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_wakeup_granularity_ns",
  		.data		= &sysctl_sched_wakeup_granularity,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,

  		.extra1		= &min_wakeup_granularity_ns,
  		.extra2		= &max_wakeup_granularity_ns,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_shares_ratelimit",
  		.data		= &sysctl_sched_shares_ratelimit,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_shares_thresh",
  		.data		= &sysctl_sched_shares_thresh,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_child_runs_first",
  		.data		= &sysctl_sched_child_runs_first,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "sched_features",
  		.data		= &sysctl_sched_features,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "sched_migration_cost",
  		.data		= &sysctl_sched_migration_cost,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "sched_nr_migrate",
  		.data		= &sysctl_sched_nr_migrate,
  		.maxlen		= sizeof(unsigned int),

  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "timer_migration",
  		.data		= &sysctl_timer_migration,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one,

  	},

  #endif

  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_rt_period_us",
  		.data		= &sysctl_sched_rt_period,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,

  		.proc_handler	= &sched_rt_handler,

  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "sched_rt_runtime_us",
  		.data		= &sysctl_sched_rt_runtime,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= &sched_rt_handler,

  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "sched_compat_yield",
  		.data		= &sysctl_sched_compat_yield,
  		.maxlen		= sizeof(unsigned int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #ifdef CONFIG_PROVE_LOCKING
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "prove_locking",
  		.data		= &prove_locking,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif
  #ifdef CONFIG_LOCK_STAT
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "lock_stat",
  		.data		= &lock_stat,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  	{

  		.ctl_name	= KERN_PANIC,
  		.procname	= "panic",
  		.data		= &panic_timeout,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= KERN_CORE_USES_PID,
  		.procname	= "core_uses_pid",
  		.data		= &core_uses_pid,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= KERN_CORE_PATTERN,
  		.procname	= "core_pattern",
  		.data		= core_pattern,

  		.maxlen		= CORENAME_MAX_SIZE,

  		.mode		= 0644,
  		.proc_handler	= &proc_dostring,
  		.strategy	= &sysctl_string,
  	},

  #ifdef CONFIG_PROC_SYSCTL

  	{

  		.procname	= "tainted",

  		.maxlen 	= sizeof(long),

  		.mode		= 0644,

  		.proc_handler	= &proc_taint,

  	},

  #endif

  #ifdef CONFIG_LATENCYTOP
  	{
  		.procname	= "latencytop",
  		.data		= &latencytop_enabled,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_BLK_DEV_INITRD
  	{
  		.ctl_name	= KERN_REALROOTDEV,
  		.procname	= "real-root-dev",
  		.data		= &real_root_dev,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "print-fatal-signals",
  		.data		= &print_fatal_signals,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #ifdef CONFIG_SPARC

  	{
  		.ctl_name	= KERN_SPARC_REBOOT,
  		.procname	= "reboot-cmd",
  		.data		= reboot_command,
  		.maxlen		= 256,
  		.mode		= 0644,
  		.proc_handler	= &proc_dostring,
  		.strategy	= &sysctl_string,
  	},
  	{
  		.ctl_name	= KERN_SPARC_STOP_A,
  		.procname	= "stop-a",
  		.data		= &stop_a_enabled,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= KERN_SPARC_SCONS_PWROFF,
  		.procname	= "scons-poweroff",
  		.data		= &scons_pwroff,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_SPARC64
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "tsb-ratio",
  		.data		= &sysctl_tsb_ratio,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef __hppa__
  	{
  		.ctl_name	= KERN_HPPA_PWRSW,
  		.procname	= "soft-power",
  		.data		= &pwrsw_enabled,
  		.maxlen		= sizeof (int),
  	 	.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= KERN_HPPA_UNALIGNED,
  		.procname	= "unaligned-trap",
  		.data		= &unaligned_enabled,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif
  	{
  		.ctl_name	= KERN_CTLALTDEL,
  		.procname	= "ctrl-alt-del",
  		.data		= &C_A_D,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #ifdef CONFIG_FUNCTION_TRACER

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "ftrace_enabled",
  		.data		= &ftrace_enabled,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &ftrace_enable_sysctl,
  	},
  #endif

  #ifdef CONFIG_STACK_TRACER
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "stack_tracer_enabled",
  		.data		= &stack_tracer_enabled,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &stack_trace_sysctl,
  	},
  #endif

  #ifdef CONFIG_TRACING
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "ftrace_dump_on_oops",

  		.data		= &ftrace_dump_on_oops,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_MODULES

  	{
  		.ctl_name	= KERN_MODPROBE,
  		.procname	= "modprobe",
  		.data		= &modprobe_path,
  		.maxlen		= KMOD_PATH_LEN,
  		.mode		= 0644,
  		.proc_handler	= &proc_dostring,
  		.strategy	= &sysctl_string,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "modules_disabled",
  		.data		= &modules_disabled,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		/* only handle a transition from default "0" to "1" */
  		.proc_handler	= &proc_dointvec_minmax,
  		.extra1		= &one,
  		.extra2		= &one,
  	},

  #endif

  #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)

  	{
  		.ctl_name	= KERN_HOTPLUG,
  		.procname	= "hotplug",

  		.data		= &uevent_helper,
  		.maxlen		= UEVENT_HELPER_PATH_LEN,

  		.mode		= 0644,
  		.proc_handler	= &proc_dostring,
  		.strategy	= &sysctl_string,
  	},
  #endif
  #ifdef CONFIG_CHR_DEV_SG
  	{
  		.ctl_name	= KERN_SG_BIG_BUFF,
  		.procname	= "sg-big-buff",
  		.data		= &sg_big_buff,
  		.maxlen		= sizeof (int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif
  #ifdef CONFIG_BSD_PROCESS_ACCT
  	{
  		.ctl_name	= KERN_ACCT,
  		.procname	= "acct",
  		.data		= &acct_parm,
  		.maxlen		= 3*sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_MAGIC_SYSRQ
  	{
  		.ctl_name	= KERN_SYSRQ,
  		.procname	= "sysrq",

  		.data		= &__sysrq_enabled,

  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_PROC_SYSCTL

  	{

  		.procname	= "cad_pid",

  		.data		= NULL,

  		.maxlen		= sizeof (int),
  		.mode		= 0600,

  		.proc_handler	= &proc_do_cad_pid,

  	},

  #endif

  	{
  		.ctl_name	= KERN_MAX_THREADS,
  		.procname	= "threads-max",
  		.data		= &max_threads,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= KERN_RANDOM,
  		.procname	= "random",
  		.mode		= 0555,
  		.child		= random_table,
  	},

  	{
  		.ctl_name	= KERN_OVERFLOWUID,
  		.procname	= "overflowuid",
  		.data		= &overflowuid,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &minolduid,
  		.extra2		= &maxolduid,
  	},
  	{
  		.ctl_name	= KERN_OVERFLOWGID,
  		.procname	= "overflowgid",
  		.data		= &overflowgid,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &minolduid,
  		.extra2		= &maxolduid,
  	},

  #ifdef CONFIG_S390

  #ifdef CONFIG_MATHEMU
  	{
  		.ctl_name	= KERN_IEEE_EMULATION_WARNINGS,
  		.procname	= "ieee_emulation_warnings",
  		.data		= &sysctl_ieee_emulation_warnings,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  	{
  		.ctl_name	= KERN_S390_USER_DEBUG_LOGGING,
  		.procname	= "userprocess_debug",
  		.data		= &sysctl_userprocess_debug,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif
  	{
  		.ctl_name	= KERN_PIDMAX,
  		.procname	= "pid_max",
  		.data		= &pid_max,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= sysctl_intvec,
  		.extra1		= &pid_max_min,
  		.extra2		= &pid_max_max,
  	},
  	{
  		.ctl_name	= KERN_PANIC_ON_OOPS,
  		.procname	= "panic_on_oops",
  		.data		= &panic_on_oops,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #if defined CONFIG_PRINTK
  	{
  		.ctl_name	= KERN_PRINTK,
  		.procname	= "printk",
  		.data		= &console_loglevel,
  		.maxlen		= 4*sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= KERN_PRINTK_RATELIMIT,
  		.procname	= "printk_ratelimit",

  		.data		= &printk_ratelimit_state.interval,

  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_jiffies,
  		.strategy	= &sysctl_jiffies,
  	},
  	{
  		.ctl_name	= KERN_PRINTK_RATELIMIT_BURST,
  		.procname	= "printk_ratelimit_burst",

  		.data		= &printk_ratelimit_state.burst,

  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  	{
  		.ctl_name	= KERN_NGROUPS_MAX,
  		.procname	= "ngroups_max",
  		.data		= &ngroups_max,
  		.maxlen		= sizeof (int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
  	{
  		.ctl_name       = KERN_UNKNOWN_NMI_PANIC,
  		.procname       = "unknown_nmi_panic",
  		.data           = &unknown_nmi_panic,
  		.maxlen         = sizeof (int),
  		.mode           = 0644,

  		.proc_handler   = &proc_dointvec,

  	},

  	{

  		.procname       = "nmi_watchdog",
  		.data           = &nmi_watchdog_enabled,
  		.maxlen         = sizeof (int),
  		.mode           = 0644,
  		.proc_handler   = &proc_nmi_enabled,

  	},
  #endif
  #if defined(CONFIG_X86)
  	{

  		.ctl_name	= KERN_PANIC_ON_NMI,
  		.procname	= "panic_on_unrecovered_nmi",
  		.data		= &panic_on_unrecovered_nmi,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "panic_on_io_nmi",
  		.data		= &panic_on_io_nmi,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= KERN_BOOTLOADER_TYPE,
  		.procname	= "bootloader_type",
  		.data		= &bootloader_type,
  		.maxlen		= sizeof (int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "bootloader_version",
  		.data		= &bootloader_version,
  		.maxlen		= sizeof (int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "kstack_depth_to_print",
  		.data		= &kstack_depth_to_print,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "io_delay_type",
  		.data		= &io_delay_type,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  #if defined(CONFIG_MMU)

  	{
  		.ctl_name	= KERN_RANDOMIZE,
  		.procname	= "randomize_va_space",
  		.data		= &randomize_va_space,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  #if defined(CONFIG_S390) && defined(CONFIG_SMP)

  	{
  		.ctl_name	= KERN_SPIN_RETRY,
  		.procname	= "spin_retry",
  		.data		= &spin_retry,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #if	defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)

  	{

  		.procname	= "acpi_video_flags",

  		.data		= &acpi_realmode_flags,

  		.maxlen		= sizeof (unsigned long),
  		.mode		= 0644,

  		.proc_handler	= &proc_doulongvec_minmax,

  	},
  #endif

  #ifdef CONFIG_IA64
  	{
  		.ctl_name	= KERN_IA64_UNALIGNED,
  		.procname	= "ignore-unaligned-usertrap",
  		.data		= &no_unaligned_warning,
  		.maxlen		= sizeof (int),
  	 	.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "unaligned-dump-stack",
  		.data		= &unaligned_dump_stack,
  		.maxlen		= sizeof (int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  #ifdef CONFIG_DETECT_SOFTLOCKUP
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "softlockup_panic",
  		.data		= &softlockup_panic,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec_minmax,

  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "softlockup_thresh",
  		.data		= &softlockup_thresh,

  		.maxlen		= sizeof(int),

  		.mode		= 0644,

  		.proc_handler	= &proc_dosoftlockup_thresh,

  		.strategy	= &sysctl_intvec,

  		.extra1		= &neg_one,

  		.extra2		= &sixty,
  	},

  #endif
  #ifdef CONFIG_DETECT_HUNG_TASK
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "hung_task_panic",
  		.data		= &sysctl_hung_task_panic,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "hung_task_check_count",
  		.data		= &sysctl_hung_task_check_count,

  		.maxlen		= sizeof(unsigned long),

  		.mode		= 0644,

  		.proc_handler	= &proc_doulongvec_minmax,

  		.strategy	= &sysctl_intvec,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "hung_task_timeout_secs",
  		.data		= &sysctl_hung_task_timeout_secs,

  		.maxlen		= sizeof(unsigned long),

  		.mode		= 0644,

  		.proc_handler	= &proc_dohung_task_timeout_secs,

  		.strategy	= &sysctl_intvec,
  	},
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "hung_task_warnings",
  		.data		= &sysctl_hung_task_warnings,

  		.maxlen		= sizeof(unsigned long),

  		.mode		= 0644,

  		.proc_handler	= &proc_doulongvec_minmax,

  		.strategy	= &sysctl_intvec,
  	},

  #endif

  #ifdef CONFIG_COMPAT
  	{
  		.ctl_name	= KERN_COMPAT_LOG,
  		.procname	= "compat-log",
  		.data		= &compat_log,
  		.maxlen		= sizeof (int),
  	 	.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_RT_MUTEXES
  	{
  		.ctl_name	= KERN_MAX_LOCK_DEPTH,
  		.procname	= "max_lock_depth",
  		.data		= &max_lock_depth,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "poweroff_cmd",
  		.data		= &poweroff_cmd,
  		.maxlen		= POWEROFF_CMD_PATH_LEN,
  		.mode		= 0644,
  		.proc_handler	= &proc_dostring,
  		.strategy	= &sysctl_string,
  	},

  #ifdef CONFIG_KEYS
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "keys",
  		.mode		= 0555,
  		.child		= key_sysctls,
  	},
  #endif

  #ifdef CONFIG_RCU_TORTURE_TEST
  	{
  		.ctl_name       = CTL_UNNUMBERED,
  		.procname       = "rcutorture_runnable",
  		.data           = &rcutorture_runnable,
  		.maxlen         = sizeof(int),
  		.mode           = 0644,
  		.proc_handler   = &proc_dointvec,
  	},
  #endif

  #ifdef CONFIG_SLOW_WORK
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "slow-work",
  		.mode		= 0555,
  		.child		= slow_work_sysctls,
  	},
  #endif

  #ifdef CONFIG_PERF_COUNTERS
  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "perf_counter_paranoid",
  		.data		= &sysctl_perf_counter_paranoid,
  		.maxlen		= sizeof(sysctl_perf_counter_paranoid),

  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "perf_counter_mlock_kb",
  		.data		= &sysctl_perf_counter_mlock,
  		.maxlen		= sizeof(sysctl_perf_counter_mlock),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "perf_counter_max_sample_rate",
  		.data		= &sysctl_perf_counter_sample_rate,
  		.maxlen		= sizeof(sysctl_perf_counter_sample_rate),

  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  #ifdef CONFIG_KMEMCHECK
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "kmemcheck",
  		.data		= &kmemcheck_enabled,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif

  /*
   * NOTE: do not add new entries to this table unless you have read
   * Documentation/sysctl/ctl_unnumbered.txt
   */

  	{ .ctl_name = 0 }
  };

  static struct ctl_table vm_table[] = {

  	{
  		.ctl_name	= VM_OVERCOMMIT_MEMORY,
  		.procname	= "overcommit_memory",
  		.data		= &sysctl_overcommit_memory,
  		.maxlen		= sizeof(sysctl_overcommit_memory),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= VM_PANIC_ON_OOM,
  		.procname	= "panic_on_oom",
  		.data		= &sysctl_panic_on_oom,
  		.maxlen		= sizeof(sysctl_panic_on_oom),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "oom_kill_allocating_task",
  		.data		= &sysctl_oom_kill_allocating_task,
  		.maxlen		= sizeof(sysctl_oom_kill_allocating_task),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "oom_dump_tasks",
  		.data		= &sysctl_oom_dump_tasks,
  		.maxlen		= sizeof(sysctl_oom_dump_tasks),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= VM_OVERCOMMIT_RATIO,
  		.procname	= "overcommit_ratio",
  		.data		= &sysctl_overcommit_ratio,
  		.maxlen		= sizeof(sysctl_overcommit_ratio),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= VM_PAGE_CLUSTER,
  		.procname	= "page-cluster", 
  		.data		= &page_cluster,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= VM_DIRTY_BACKGROUND,
  		.procname	= "dirty_background_ratio",
  		.data		= &dirty_background_ratio,
  		.maxlen		= sizeof(dirty_background_ratio),
  		.mode		= 0644,

  		.proc_handler	= &dirty_background_ratio_handler,

  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one_hundred,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "dirty_background_bytes",
  		.data		= &dirty_background_bytes,
  		.maxlen		= sizeof(dirty_background_bytes),
  		.mode		= 0644,
  		.proc_handler	= &dirty_background_bytes_handler,
  		.strategy	= &sysctl_intvec,

  		.extra1		= &one_ul,

  	},
  	{

  		.ctl_name	= VM_DIRTY_RATIO,
  		.procname	= "dirty_ratio",
  		.data		= &vm_dirty_ratio,
  		.maxlen		= sizeof(vm_dirty_ratio),
  		.mode		= 0644,

  		.proc_handler	= &dirty_ratio_handler,

  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one_hundred,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "dirty_bytes",
  		.data		= &vm_dirty_bytes,
  		.maxlen		= sizeof(vm_dirty_bytes),
  		.mode		= 0644,
  		.proc_handler	= &dirty_bytes_handler,
  		.strategy	= &sysctl_intvec,

  		.extra1		= &dirty_bytes_min,

  	},
  	{

  		.procname	= "dirty_writeback_centisecs",

  		.data		= &dirty_writeback_interval,
  		.maxlen		= sizeof(dirty_writeback_interval),

  		.mode		= 0644,
  		.proc_handler	= &dirty_writeback_centisecs_handler,
  	},
  	{

  		.procname	= "dirty_expire_centisecs",

  		.data		= &dirty_expire_interval,
  		.maxlen		= sizeof(dirty_expire_interval),

  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec,

  	},
  	{
  		.ctl_name	= VM_NR_PDFLUSH_THREADS,
  		.procname	= "nr_pdflush_threads",
  		.data		= &nr_pdflush_threads,
  		.maxlen		= sizeof nr_pdflush_threads,
  		.mode		= 0444 /* read-only*/,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= VM_SWAPPINESS,
  		.procname	= "swappiness",
  		.data		= &vm_swappiness,
  		.maxlen		= sizeof(vm_swappiness),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one_hundred,
  	},
  #ifdef CONFIG_HUGETLB_PAGE
  	 {

  		.procname	= "nr_hugepages",

  		.data		= NULL,

  		.maxlen		= sizeof(unsigned long),
  		.mode		= 0644,
  		.proc_handler	= &hugetlb_sysctl_handler,
  		.extra1		= (void *)&hugetlb_zero,
  		.extra2		= (void *)&hugetlb_infinity,
  	 },
  	 {
  		.ctl_name	= VM_HUGETLB_GROUP,
  		.procname	= "hugetlb_shm_group",
  		.data		= &sysctl_hugetlb_shm_group,
  		.maxlen		= sizeof(gid_t),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	 },

  	 {
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "hugepages_treat_as_movable",
  		.data		= &hugepages_treat_as_movable,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &hugetlb_treat_movable_handler,
  	},

  	{
  		.ctl_name	= CTL_UNNUMBERED,

  		.procname	= "nr_overcommit_hugepages",

  		.data		= NULL,
  		.maxlen		= sizeof(unsigned long),

  		.mode		= 0644,

  		.proc_handler	= &hugetlb_overcommit_handler,

  		.extra1		= (void *)&hugetlb_zero,
  		.extra2		= (void *)&hugetlb_infinity,

  	},

  #endif
  	{
  		.ctl_name	= VM_LOWMEM_RESERVE_RATIO,
  		.procname	= "lowmem_reserve_ratio",
  		.data		= &sysctl_lowmem_reserve_ratio,
  		.maxlen		= sizeof(sysctl_lowmem_reserve_ratio),
  		.mode		= 0644,
  		.proc_handler	= &lowmem_reserve_ratio_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  	},
  	{

  		.ctl_name	= VM_DROP_PAGECACHE,
  		.procname	= "drop_caches",
  		.data		= &sysctl_drop_caches,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= drop_caches_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  	},
  	{

  		.ctl_name	= VM_MIN_FREE_KBYTES,
  		.procname	= "min_free_kbytes",
  		.data		= &min_free_kbytes,
  		.maxlen		= sizeof(min_free_kbytes),
  		.mode		= 0644,
  		.proc_handler	= &min_free_kbytes_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},

  	{
  		.ctl_name	= VM_PERCPU_PAGELIST_FRACTION,
  		.procname	= "percpu_pagelist_fraction",
  		.data		= &percpu_pagelist_fraction,
  		.maxlen		= sizeof(percpu_pagelist_fraction),
  		.mode		= 0644,
  		.proc_handler	= &percpu_pagelist_fraction_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &min_percpu_pagelist_fract,
  	},

  #ifdef CONFIG_MMU
  	{
  		.ctl_name	= VM_MAX_MAP_COUNT,
  		.procname	= "max_map_count",
  		.data		= &sysctl_max_map_count,
  		.maxlen		= sizeof(sysctl_max_map_count),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec
  	},

  #else
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "nr_trim_pages",
  		.data		= &sysctl_nr_trim_pages,
  		.maxlen		= sizeof(sysctl_nr_trim_pages),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},

  #endif
  	{
  		.ctl_name	= VM_LAPTOP_MODE,
  		.procname	= "laptop_mode",
  		.data		= &laptop_mode,
  		.maxlen		= sizeof(laptop_mode),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec_jiffies,
  		.strategy	= &sysctl_jiffies,

  	},
  	{
  		.ctl_name	= VM_BLOCK_DUMP,
  		.procname	= "block_dump",
  		.data		= &block_dump,
  		.maxlen		= sizeof(block_dump),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},
  	{
  		.ctl_name	= VM_VFS_CACHE_PRESSURE,
  		.procname	= "vfs_cache_pressure",
  		.data		= &sysctl_vfs_cache_pressure,
  		.maxlen		= sizeof(sysctl_vfs_cache_pressure),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},
  #ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
  	{
  		.ctl_name	= VM_LEGACY_VA_LAYOUT,
  		.procname	= "legacy_va_layout",
  		.data		= &sysctl_legacy_va_layout,
  		.maxlen		= sizeof(sysctl_legacy_va_layout),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},
  #endif

  #ifdef CONFIG_NUMA
  	{
  		.ctl_name	= VM_ZONE_RECLAIM_MODE,
  		.procname	= "zone_reclaim_mode",
  		.data		= &zone_reclaim_mode,
  		.maxlen		= sizeof(zone_reclaim_mode),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,

  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,

  	},

  	{
  		.ctl_name	= VM_MIN_UNMAPPED,
  		.procname	= "min_unmapped_ratio",
  		.data		= &sysctl_min_unmapped_ratio,
  		.maxlen		= sizeof(sysctl_min_unmapped_ratio),
  		.mode		= 0644,
  		.proc_handler	= &sysctl_min_unmapped_ratio_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one_hundred,
  	},

  	{
  		.ctl_name	= VM_MIN_SLAB,
  		.procname	= "min_slab_ratio",
  		.data		= &sysctl_min_slab_ratio,
  		.maxlen		= sizeof(sysctl_min_slab_ratio),
  		.mode		= 0644,
  		.proc_handler	= &sysctl_min_slab_ratio_sysctl_handler,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one_hundred,
  	},

  #endif

  #ifdef CONFIG_SMP
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "stat_interval",
  		.data		= &sysctl_stat_interval,
  		.maxlen		= sizeof(sysctl_stat_interval),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_jiffies,
  		.strategy	= &sysctl_jiffies,
  	},
  #endif

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "mmap_min_addr",
  		.data		= &mmap_min_addr,
  		.maxlen         = sizeof(unsigned long),
  		.mode		= 0644,
  		.proc_handler	= &proc_doulongvec_minmax,
  	},

  #ifdef CONFIG_NUMA
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "numa_zonelist_order",
  		.data		= &numa_zonelist_order,
  		.maxlen		= NUMA_ZONELIST_ORDER_LEN,
  		.mode		= 0644,
  		.proc_handler	= &numa_zonelist_order_handler,
  		.strategy	= &sysctl_string,
  	},
  #endif

  #if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \

     (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))

  	{
  		.ctl_name	= VM_VDSO_ENABLED,
  		.procname	= "vdso_enabled",
  		.data		= &vdso_enabled,
  		.maxlen		= sizeof(vdso_enabled),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  	},
  #endif

  #ifdef CONFIG_HIGHMEM
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "highmem_is_dirtyable",
  		.data		= &vm_highmem_is_dirtyable,
  		.maxlen		= sizeof(vm_highmem_is_dirtyable),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &one,
  	},
  #endif

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "scan_unevictable_pages",
  		.data		= &scan_unevictable_pages,
  		.maxlen		= sizeof(scan_unevictable_pages),
  		.mode		= 0644,
  		.proc_handler	= &scan_unevictable_handler,
  	},

  /*
   * NOTE: do not add new entries to this table unless you have read
   * Documentation/sysctl/ctl_unnumbered.txt
   */

  	{ .ctl_name = 0 }
  };

  #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)

  static struct ctl_table binfmt_misc_table[] = {

  	{ .ctl_name = 0 }
  };
  #endif

  static struct ctl_table fs_table[] = {

  	{
  		.ctl_name	= FS_NRINODE,
  		.procname	= "inode-nr",
  		.data		= &inodes_stat,
  		.maxlen		= 2*sizeof(int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= FS_STATINODE,
  		.procname	= "inode-state",
  		.data		= &inodes_stat,
  		.maxlen		= 7*sizeof(int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.procname	= "file-nr",
  		.data		= &files_stat,
  		.maxlen		= 3*sizeof(int),
  		.mode		= 0444,

  		.proc_handler	= &proc_nr_files,

  	},
  	{
  		.ctl_name	= FS_MAXFILE,
  		.procname	= "file-max",
  		.data		= &files_stat.max_files,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  	{

  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "nr_open",
  		.data		= &sysctl_nr_open,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec_minmax,
  		.extra1		= &sysctl_nr_open_min,
  		.extra2		= &sysctl_nr_open_max,

  	},
  	{

  		.ctl_name	= FS_DENTRY,
  		.procname	= "dentry-state",
  		.data		= &dentry_stat,
  		.maxlen		= 6*sizeof(int),
  		.mode		= 0444,
  		.proc_handler	= &proc_dointvec,
  	},
  	{
  		.ctl_name	= FS_OVERFLOWUID,
  		.procname	= "overflowuid",
  		.data		= &fs_overflowuid,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &minolduid,
  		.extra2		= &maxolduid,
  	},
  	{
  		.ctl_name	= FS_OVERFLOWGID,
  		.procname	= "overflowgid",
  		.data		= &fs_overflowgid,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &minolduid,
  		.extra2		= &maxolduid,
  	},

  #ifdef CONFIG_FILE_LOCKING

  	{
  		.ctl_name	= FS_LEASES,
  		.procname	= "leases-enable",
  		.data		= &leases_enable,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},

  #endif

  #ifdef CONFIG_DNOTIFY
  	{
  		.ctl_name	= FS_DIR_NOTIFY,
  		.procname	= "dir-notify-enable",
  		.data		= &dir_notify_enable,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= &proc_dointvec,
  	},
  #endif
  #ifdef CONFIG_MMU

  #ifdef CONFIG_FILE_LOCKING

  	{
  		.ctl_name	= FS_LEASE_TIME,
  		.procname	= "lease-break-time",
  		.data		= &lease_break_time,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec,

  	},

  #endif

  #ifdef CONFIG_AIO

  	{

  		.procname	= "aio-nr",
  		.data		= &aio_nr,
  		.maxlen		= sizeof(aio_nr),
  		.mode		= 0444,

  		.proc_handler	= &proc_doulongvec_minmax,

  	},
  	{

  		.procname	= "aio-max-nr",
  		.data		= &aio_max_nr,
  		.maxlen		= sizeof(aio_max_nr),
  		.mode		= 0644,

  		.proc_handler	= &proc_doulongvec_minmax,

  	},

  #endif /* CONFIG_AIO */

  #ifdef CONFIG_INOTIFY_USER

  	{
  		.ctl_name	= FS_INOTIFY,
  		.procname	= "inotify",
  		.mode		= 0555,
  		.child		= inotify_table,
  	},
  #endif	

  #ifdef CONFIG_EPOLL
  	{
  		.procname	= "epoll",
  		.mode		= 0555,
  		.child		= epoll_table,
  	},
  #endif

  #endif

  	{
  		.ctl_name	= KERN_SETUID_DUMPABLE,
  		.procname	= "suid_dumpable",
  		.data		= &suid_dumpable,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= &proc_dointvec_minmax,
  		.strategy	= &sysctl_intvec,
  		.extra1		= &zero,
  		.extra2		= &two,

  	},

  #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "binfmt_misc",
  		.mode		= 0555,
  		.child		= binfmt_misc_table,
  	},
  #endif

  /*
   * NOTE: do not add new entries to this table unless you have read
   * Documentation/sysctl/ctl_unnumbered.txt

   */

  	{ .ctl_name = 0 }
  };

  static struct ctl_table debug_table[] = {

  #if defined(CONFIG_X86) || defined(CONFIG_PPC)

  	{
  		.ctl_name	= CTL_UNNUMBERED,
  		.procname	= "exception-trace",
  		.data		= &show_unhandled_signals,
  		.maxlen		= sizeof(int),
  		.mode		= 0644,
  		.proc_handler	= proc_dointvec
  	},
  #endif

  	{ .ctl_name = 0 }
  };

  static struct ctl_table dev_table[] = {

  	{ .ctl_name = 0 }

  };

  static DEFINE_SPINLOCK(sysctl_lock);
  
  /* called under sysctl_lock */
  static int use_table(struct ctl_table_header *p)
  {
  	if (unlikely(p->unregistering))
  		return 0;
  	p->used++;
  	return 1;
  }
  
  /* called under sysctl_lock */
  static void unuse_table(struct ctl_table_header *p)
  {
  	if (!--p->used)
  		if (unlikely(p->unregistering))
  			complete(p->unregistering);
  }
  
  /* called under sysctl_lock, will reacquire if has to wait */
  static void start_unregistering(struct ctl_table_header *p)
  {
  	/*
  	 * if p->used is 0, nobody will ever touch that entry again;
  	 * we'll eliminate all paths to it before dropping sysctl_lock
  	 */
  	if (unlikely(p->used)) {
  		struct completion wait;
  		init_completion(&wait);
  		p->unregistering = &wait;
  		spin_unlock(&sysctl_lock);
  		wait_for_completion(&wait);
  		spin_lock(&sysctl_lock);

  	} else {
  		/* anything non-NULL; we'll never dereference it */
  		p->unregistering = ERR_PTR(-EINVAL);

  	}
  	/*
  	 * do not remove from the list until nobody holds it; walking the
  	 * list in do_sysctl() relies on that.
  	 */
  	list_del_init(&p->ctl_entry);
  }

  void sysctl_head_get(struct ctl_table_header *head)
  {
  	spin_lock(&sysctl_lock);
  	head->count++;
  	spin_unlock(&sysctl_lock);
  }
  
  void sysctl_head_put(struct ctl_table_header *head)
  {
  	spin_lock(&sysctl_lock);
  	if (!--head->count)
  		kfree(head);
  	spin_unlock(&sysctl_lock);
  }
  
  struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head)
  {
  	if (!head)
  		BUG();
  	spin_lock(&sysctl_lock);
  	if (!use_table(head))
  		head = ERR_PTR(-ENOENT);
  	spin_unlock(&sysctl_lock);
  	return head;
  }

  void sysctl_head_finish(struct ctl_table_header *head)
  {
  	if (!head)
  		return;
  	spin_lock(&sysctl_lock);
  	unuse_table(head);
  	spin_unlock(&sysctl_lock);
  }

  static struct ctl_table_set *
  lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
  {
  	struct ctl_table_set *set = &root->default_set;
  	if (root->lookup)
  		set = root->lookup(root, namespaces);
  	return set;
  }

  static struct list_head *
  lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)

  {

  	struct ctl_table_set *set = lookup_header_set(root, namespaces);
  	return &set->list;

  }
  
  struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
  					    struct ctl_table_header *prev)
  {
  	struct ctl_table_root *root;
  	struct list_head *header_list;

  	struct ctl_table_header *head;
  	struct list_head *tmp;

  	spin_lock(&sysctl_lock);
  	if (prev) {

  		head = prev;

  		tmp = &prev->ctl_entry;
  		unuse_table(prev);
  		goto next;
  	}
  	tmp = &root_table_header.ctl_entry;
  	for (;;) {
  		head = list_entry(tmp, struct ctl_table_header, ctl_entry);
  
  		if (!use_table(head))
  			goto next;
  		spin_unlock(&sysctl_lock);
  		return head;
  	next:

  		root = head->root;

  		tmp = tmp->next;

  		header_list = lookup_header_list(root, namespaces);
  		if (tmp != header_list)
  			continue;
  
  		do {
  			root = list_entry(root->root_list.next,
  					struct ctl_table_root, root_list);
  			if (root == &sysctl_table_root)
  				goto out;
  			header_list = lookup_header_list(root, namespaces);
  		} while (list_empty(header_list));
  		tmp = header_list->next;

  	}

  out:

  	spin_unlock(&sysctl_lock);
  	return NULL;
  }

  struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
  {
  	return __sysctl_head_next(current->nsproxy, prev);
  }
  
  void register_sysctl_root(struct ctl_table_root *root)
  {
  	spin_lock(&sysctl_lock);
  	list_add_tail(&root->root_list, &sysctl_table_root.root_list);
  	spin_unlock(&sysctl_lock);
  }

  #ifdef CONFIG_SYSCTL_SYSCALL

  /* Perform the actual read/write of a sysctl table entry. */

  static int do_sysctl_strategy(struct ctl_table_root *root,
  			struct ctl_table *table,

  			void __user *oldval, size_t __user *oldlenp,
  			void __user *newval, size_t newlen)
  {
  	int op = 0, rc;
  
  	if (oldval)

  		op |= MAY_READ;

  	if (newval)

  		op |= MAY_WRITE;

  	if (sysctl_perm(root, table, op))

  		return -EPERM;
  
  	if (table->strategy) {

  		rc = table->strategy(table, oldval, oldlenp, newval, newlen);

  		if (rc < 0)
  			return rc;
  		if (rc > 0)
  			return 0;
  	}
  
  	/* If there is no strategy routine, or if the strategy returns
  	 * zero, proceed with automatic r/w */
  	if (table->data && table->maxlen) {

  		rc = sysctl_data(table, oldval, oldlenp, newval, newlen);

  		if (rc < 0)
  			return rc;
  	}
  	return 0;
  }
  
  static int parse_table(int __user *name, int nlen,
  		       void __user *oldval, size_t __user *oldlenp,
  		       void __user *newval, size_t newlen,

  		       struct ctl_table_root *root,

  		       struct ctl_table *table)
  {
  	int n;
  repeat:
  	if (!nlen)
  		return -ENOTDIR;
  	if (get_user(n, name))
  		return -EFAULT;
  	for ( ; table->ctl_name || table->procname; table++) {
  		if (!table->ctl_name)
  			continue;
  		if (n == table->ctl_name) {
  			int error;
  			if (table->child) {

  				if (sysctl_perm(root, table, MAY_EXEC))

  					return -EPERM;
  				name++;
  				nlen--;
  				table = table->child;
  				goto repeat;
  			}

  			error = do_sysctl_strategy(root, table,

  						   oldval, oldlenp,
  						   newval, newlen);
  			return error;
  		}
  	}
  	return -ENOTDIR;
  }

  int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
  	       void __user *newval, size_t newlen)
  {

  	struct ctl_table_header *head;

  	int error = -ENOTDIR;

  
  	if (nlen <= 0 || nlen >= CTL_MAXNAME)
  		return -ENOTDIR;
  	if (oldval) {
  		int old_len;
  		if (!oldlenp || get_user(old_len, oldlenp))
  			return -EFAULT;
  	}

  	for (head = sysctl_head_next(NULL); head;
  			head = sysctl_head_next(head)) {

  		error = parse_table(name, nlen, oldval, oldlenp, 

  					newval, newlen,
  					head->root, head->ctl_table);

  		if (error != -ENOTDIR) {
  			sysctl_head_finish(head);

  			break;

  		}
  	}

  	return error;

  }

  SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)

  {
  	struct __sysctl_args tmp;
  	int error;
  
  	if (copy_from_user(&tmp, args, sizeof(tmp)))
  		return -EFAULT;

  	error = deprecated_sysctl_warning(&tmp);
  	if (error)
  		goto out;

  	lock_kernel();
  	error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
  			  tmp.newval, tmp.newlen);
  	unlock_kernel();

  out:

  	return error;
  }

  #endif /* CONFIG_SYSCTL_SYSCALL */

  
  /*

   * sysctl_perm does NOT grant the superuser all rights automatically, because

   * some sysctl variables are readonly even to root.
   */
  
  static int test_perm(int mode, int op)
  {

  	if (!current_euid())

  		mode >>= 6;
  	else if (in_egroup_p(0))
  		mode >>= 3;

  	if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)

  		return 0;
  	return -EACCES;
  }

  int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)

  {
  	int error;

  	int mode;

  	error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC));

  	if (error)
  		return error;

  
  	if (root->permissions)
  		mode = root->permissions(root, current->nsproxy, table);
  	else
  		mode = table->mode;
  
  	return test_perm(mode, op);

  }

  static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
  {
  	for (; table->ctl_name || table->procname; table++) {
  		table->parent = parent;
  		if (table->child)
  			sysctl_set_parent(table, table->child);
  	}
  }
  
  static __init int sysctl_init(void)
  {
  	sysctl_set_parent(NULL, root_table);

  #ifdef CONFIG_SYSCTL_SYSCALL_CHECK
  	{
  		int err;
  		err = sysctl_check_table(current->nsproxy, root_table);
  	}
  #endif

  	return 0;
  }
  
  core_initcall(sysctl_init);

  static struct ctl_table *is_branch_in(struct ctl_table *branch,
  				      struct ctl_table *table)

  {
  	struct ctl_table *p;
  	const char *s = branch->procname;
  
  	/* branch should have named subdirectory as its first element */
  	if (!s || !branch->child)

  		return NULL;

  
  	/* ... and nothing else */
  	if (branch[1].procname || branch[1].ctl_name)

  		return NULL;

  
  	/* table should contain subdirectory with the same name */
  	for (p = table; p->procname || p->ctl_name; p++) {
  		if (!p->child)
  			continue;
  		if (p->procname && strcmp(p->procname, s) == 0)

  			return p;

  	}

  	return NULL;

  }
  
  /* see if attaching q to p would be an improvement */
  static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
  {
  	struct ctl_table *to = p->ctl_table, *by = q->ctl_table;

  	struct ctl_table *next;

  	int is_better = 0;
  	int not_in_parent = !p->attached_by;

  	while ((next = is_branch_in(by, to)) != NULL) {

  		if (by == q->attached_by)
  			is_better = 1;
  		if (to == p->attached_by)
  			not_in_parent = 1;
  		by = by->child;

  		to = next->child;

  	}
  
  	if (is_better && not_in_parent) {
  		q->attached_by = by;
  		q->attached_to = to;
  		q->parent = p;
  	}
  }

  /**

   * __register_sysctl_paths - register a sysctl hierarchy
   * @root: List of sysctl headers to register on
   * @namespaces: Data to compute which lists of sysctl entries are visible

   * @path: The path to the directory the sysctl table is in.

   * @table: the top-level table structure

   *
   * Register a sysctl table hierarchy. @table should be a filled in ctl_table

   * array. A completely 0 filled entry terminates the table.

   *

   * The members of the &struct ctl_table structure are used as follows:

   *
   * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
   *            must be unique within that level of sysctl
   *
   * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
   *            enter a sysctl file
   *
   * data - a pointer to data for use by proc_handler
   *
   * maxlen - the maximum size in bytes of the data
   *
   * mode - the file permissions for the /proc/sys file, and for sysctl(2)
   *
   * child - a pointer to the child sysctl table if this entry is a directory, or
   *         %NULL.
   *
   * proc_handler - the text handler routine (described below)
   *
   * strategy - the strategy routine (described below)
   *
   * de - for internal use by the sysctl routines
   *
   * extra1, extra2 - extra pointers usable by the proc handler routines
   *
   * Leaf nodes in the sysctl tree will be represented by a single file
   * under /proc; non-leaf nodes will be represented by directories.
   *
   * sysctl(2) can automatically manage read and write requests through
   * the sysctl table.  The data and maxlen fields of the ctl_table
   * struct enable minimal validation of the values being written to be
   * performed, and the mode field allows minimal authentication.
   *
   * More sophisticated management can be enabled by the provision of a
   * strategy routine with the table entry.  This will be called before
   * any automatic read or write of the data is performed.
   *
   * The strategy routine may return
   *
   * < 0 - Error occurred (error is passed to user process)
   *
   * 0   - OK - proceed with automatic read or write.
   *
   * > 0 - OK - read or write has been done by the strategy routine, so
   *       return immediately.
   *
   * There must be a proc_handler routine for any terminal nodes
   * mirrored under /proc/sys (non-terminals are handled by a built-in
   * directory handler).  Several default handlers are available to
   * cover common cases -
   *
   * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
   * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(), 
   * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
   *
   * It is the handler's job to read the input buffer from user memory
   * and process it. The handler should return 0 on success.
   *
   * This routine returns %NULL on a failure to register, and a pointer
   * to the table header on success.
   */

  struct ctl_table_header *__register_sysctl_paths(
  	struct ctl_table_root *root,
  	struct nsproxy *namespaces,
  	const struct ctl_path *path, struct ctl_table *table)

  {

  	struct ctl_table_header *header;
  	struct ctl_table *new, **prevp;
  	unsigned int n, npath;

  	struct ctl_table_set *set;

  
  	/* Count the path components */
  	for (npath = 0; path[npath].ctl_name || path[npath].procname; ++npath)
  		;
  
  	/*
  	 * For each path component, allocate a 2-element ctl_table array.
  	 * The first array element will be filled with the sysctl entry
  	 * for this, the second will be the sentinel (ctl_name == 0).
  	 *
  	 * We allocate everything in one go so that we don't have to
  	 * worry about freeing additional memory in unregister_sysctl_table.
  	 */
  	header = kzalloc(sizeof(struct ctl_table_header) +
  			 (2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
  	if (!header)

  		return NULL;

  
  	new = (struct ctl_table *) (header + 1);
  
  	/* Now connect the dots */
  	prevp = &header->ctl_table;
  	for (n = 0; n < npath; ++n, ++path) {
  		/* Copy the procname */
  		new->procname = path->procname;
  		new->ctl_name = path->ctl_name;
  		new->mode     = 0555;
  
  		*prevp = new;
  		prevp = &new->child;
  
  		new += 2;
  	}
  	*prevp = table;

  	header->ctl_table_arg = table;

  
  	INIT_LIST_HEAD(&header->ctl_entry);
  	header->used = 0;
  	header->unregistering = NULL;

  	header->root = root;

  	sysctl_set_parent(NULL, header->ctl_table);

  	header->count = 1;

  #ifdef CONFIG_SYSCTL_SYSCALL_CHECK

  	if (sysctl_check_table(namespaces, header->ctl_table)) {

  		kfree(header);

  		return NULL;
  	}

  #endif

  	spin_lock(&sysctl_lock);

  	header->set = lookup_header_set(root, namespaces);

  	header->attached_by = header->ctl_table;
  	header->attached_to = root_table;
  	header->parent = &root_table_header;
  	for (set = header->set; set; set = set->parent) {
  		struct ctl_table_header *p;
  		list_for_each_entry(p, &set->list, ctl_entry) {
  			if (p->unregistering)
  				continue;
  			try_attach(p, header);
  		}
  	}
  	header->parent->count++;

  	list_add_tail(&header->ctl_entry, &header->set->list);

  	spin_unlock(&sysctl_lock);

  
  	return header;
  }
  
  /**

   * register_sysctl_table_path - register a sysctl table hierarchy
   * @path: The path to the directory the sysctl table is in.
   * @table: the top-level table structure
   *
   * Register a sysctl table hierarchy. @table should be a filled in ctl_table
   * array. A completely 0 filled entry terminates the table.
   *
   * See __register_sysctl_paths for more details.
   */
  struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
  						struct ctl_table *table)
  {
  	return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
  					path, table);
  }
  
  /**

   * register_sysctl_table - register a sysctl table hierarchy
   * @table: the top-level table structure
   *
   * Register a sysctl table hierarchy. @table should be a filled in ctl_table
   * array. A completely 0 filled entry terminates the table.
   *
   * See register_sysctl_paths for more details.
   */
  struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
  {
  	static const struct ctl_path null_path[] = { {} };
  
  	return register_sysctl_paths(null_path, table);

  }
  
  /**
   * unregister_sysctl_table - unregister a sysctl table hierarchy
   * @header: the header returned from register_sysctl_table
   *
   * Unregisters the sysctl table and all children. proc entries may not
   * actually be removed until they are no longer used by anyone.
   */
  void unregister_sysctl_table(struct ctl_table_header * header)
  {

  	might_sleep();

  
  	if (header == NULL)
  		return;

  	spin_lock(&sysctl_lock);
  	start_unregistering(header);

  	if (!--header->parent->count) {
  		WARN_ON(1);
  		kfree(header->parent);
  	}

  	if (!--header->count)
  		kfree(header);

  	spin_unlock(&sysctl_lock);

  }

  int sysctl_is_seen(struct ctl_table_header *p)
  {
  	struct ctl_table_set *set = p->set;
  	int res;
  	spin_lock(&sysctl_lock);
  	if (p->unregistering)
  		res = 0;
  	else if (!set->is_seen)
  		res = 1;
  	else
  		res = set->is_seen(set);
  	spin_unlock(&sysctl_lock);
  	return res;
  }

  void setup_sysctl_set(struct ctl_table_set *p,
  	struct ctl_table_set *parent,
  	int (*is_seen)(struct ctl_table_set *))
  {
  	INIT_LIST_HEAD(&p->list);
  	p->parent = parent ? parent : &sysctl_table_root.default_set;
  	p->is_seen = is_seen;
  }

  #else /* !CONFIG_SYSCTL */

  struct ctl_table_header *register_sysctl_table(struct ctl_table * table)

  {
  	return NULL;
  }

  struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
  						    struct ctl_table *table)
  {
  	return NULL;
  }

  void unregister_sysctl_table(struct ctl_table_header * table)
  {
  }

  void setup_sysctl_set(struct ctl_table_set *p,
  	struct ctl_table_set *parent,
  	int (*is_seen)(struct ctl_table_set *))
  {
  }

  void sysctl_head_put(struct ctl_table_header *head)
  {
  }

  #endif /* CONFIG_SYSCTL */

  /*
   * /proc/sys support
   */

  #ifdef CONFIG_PROC_SYSCTL

  static int _proc_do_string(void* data, int maxlen, int write,
  			   struct file *filp, void __user *buffer,
  			   size_t *lenp, loff_t *ppos)

  {
  	size_t len;
  	char __user *p;
  	char c;

  
  	if (!data || !maxlen || !*lenp) {

  		*lenp = 0;
  		return 0;
  	}

  	if (write) {
  		len = 0;
  		p = buffer;
  		while (len < *lenp) {
  			if (get_user(c, p++))
  				return -EFAULT;
  			if (c == 0 || c == '
  ')
  				break;
  			len++;
  		}

  		if (len >= maxlen)
  			len = maxlen-1;
  		if(copy_from_user(data, buffer, len))

  			return -EFAULT;

  		((char *) data)[len] = 0;

  		*ppos += *lenp;
  	} else {

  		len = strlen(data);
  		if (len > maxlen)
  			len = maxlen;

  
  		if (*ppos > len) {
  			*lenp = 0;
  			return 0;
  		}
  
  		data += *ppos;
  		len  -= *ppos;

  		if (len > *lenp)
  			len = *lenp;
  		if (len)

  			if(copy_to_user(buffer, data, len))

  				return -EFAULT;
  		if (len < *lenp) {
  			if(put_user('
  ', ((char __user *) buffer) + len))
  				return -EFAULT;
  			len++;
  		}
  		*lenp = len;
  		*ppos += len;
  	}
  	return 0;
  }

  /**
   * proc_dostring - read a string sysctl
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes a string from/to the user buffer. If the kernel
   * buffer provided is not large enough to hold the string, the
   * string is truncated. The copied string is %NULL-terminated.
   * If the string is being read by the user process, it is copied
   * and a newline '
  ' is added. It is truncated if the buffer is
   * not large enough.
   *
   * Returns 0 on success.
   */

  int proc_dostring(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return _proc_do_string(table->data, table->maxlen, write, filp,
  			       buffer, lenp, ppos);
  }

  
  static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
  				 int *valp,
  				 int write, void *data)
  {
  	if (write) {
  		*valp = *negp ? -*lvalp : *lvalp;
  	} else {
  		int val = *valp;
  		if (val < 0) {
  			*negp = -1;
  			*lvalp = (unsigned long)-val;
  		} else {
  			*negp = 0;
  			*lvalp = (unsigned long)val;
  		}
  	}
  	return 0;
  }

  static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,

  		  int write, struct file *filp, void __user *buffer,
  		  size_t *lenp, loff_t *ppos,

  		  int (*conv)(int *negp, unsigned long *lvalp, int *valp,
  			      int write, void *data),
  		  void *data)
  {
  #define TMPBUFLEN 21

  	int *i, vleft, first = 1, neg;

  	unsigned long lval;
  	size_t left, len;
  	
  	char buf[TMPBUFLEN], *p;
  	char __user *s = buffer;
  	

  	if (!tbl_data || !table->maxlen || !*lenp ||

  	    (*ppos && !write)) {
  		*lenp = 0;
  		return 0;
  	}
  	

  	i = (int *) tbl_data;

  	vleft = table->maxlen / sizeof(*i);
  	left = *lenp;
  
  	if (!conv)
  		conv = do_proc_dointvec_conv;
  
  	for (; left && vleft--; i++, first=0) {
  		if (write) {
  			while (left) {
  				char c;
  				if (get_user(c, s))
  					return -EFAULT;
  				if (!isspace(c))
  					break;
  				left--;
  				s++;
  			}
  			if (!left)
  				break;
  			neg = 0;
  			len = left;
  			if (len > sizeof(buf) - 1)
  				len = sizeof(buf) - 1;
  			if (copy_from_user(buf, s, len))
  				return -EFAULT;
  			buf[len] = 0;
  			p = buf;
  			if (*p == '-' && left > 1) {
  				neg = 1;

  				p++;

  			}
  			if (*p < '0' || *p > '9')
  				break;
  
  			lval = simple_strtoul(p, &p, 0);
  
  			len = p-buf;
  			if ((len < left) && *p && !isspace(*p))
  				break;

  			s += len;
  			left -= len;
  
  			if (conv(&neg, &lval, i, 1, data))
  				break;
  		} else {
  			p = buf;
  			if (!first)
  				*p++ = '\t';
  	
  			if (conv(&neg, &lval, i, 0, data))
  				break;
  
  			sprintf(p, "%s%lu", neg ? "-" : "", lval);
  			len = strlen(buf);
  			if (len > left)
  				len = left;
  			if(copy_to_user(s, buf, len))
  				return -EFAULT;
  			left -= len;
  			s += len;
  		}
  	}
  
  	if (!write && !first && left) {
  		if(put_user('
  ', s))
  			return -EFAULT;
  		left--, s++;
  	}
  	if (write) {
  		while (left) {
  			char c;
  			if (get_user(c, s++))
  				return -EFAULT;
  			if (!isspace(c))
  				break;
  			left--;
  		}
  	}
  	if (write && first)
  		return -EINVAL;
  	*lenp -= left;
  	*ppos += *lenp;
  	return 0;
  #undef TMPBUFLEN
  }

  static int do_proc_dointvec(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos,
  		  int (*conv)(int *negp, unsigned long *lvalp, int *valp,
  			      int write, void *data),
  		  void *data)
  {
  	return __do_proc_dointvec(table->data, table, write, filp,
  			buffer, lenp, ppos, conv, data);
  }

  /**
   * proc_dointvec - read a vector of integers
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
   * values from/to the user buffer, treated as an ASCII string. 
   *
   * Returns 0 on success.
   */

  int proc_dointvec(struct ctl_table *table, int write, struct file *filp,

  		     void __user *buffer, size_t *lenp, loff_t *ppos)
  {
      return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
  		    	    NULL,NULL);
  }

  /*

   * Taint values can only be increased
   * This means we can safely use a temporary.

   */

  static int proc_taint(struct ctl_table *table, int write, struct file *filp,

  			       void __user *buffer, size_t *lenp, loff_t *ppos)
  {

  	struct ctl_table t;
  	unsigned long tmptaint = get_taint();
  	int err;

  	if (write && !capable(CAP_SYS_ADMIN))

  		return -EPERM;

  	t = *table;
  	t.data = &tmptaint;
  	err = proc_doulongvec_minmax(&t, write, filp, buffer, lenp, ppos);
  	if (err < 0)
  		return err;
  
  	if (write) {
  		/*
  		 * Poor man's atomic or. Not worth adding a primitive
  		 * to everyone's atomic.h for this
  		 */
  		int i;
  		for (i = 0; i < BITS_PER_LONG && tmptaint >> i; i++) {
  			if ((tmptaint >> i) & 1)
  				add_taint(i);
  		}
  	}
  
  	return err;

  }

  struct do_proc_dointvec_minmax_conv_param {
  	int *min;
  	int *max;
  };
  
  static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp, 
  					int *valp, 
  					int write, void *data)
  {
  	struct do_proc_dointvec_minmax_conv_param *param = data;
  	if (write) {
  		int val = *negp ? -*lvalp : *lvalp;
  		if ((param->min && *param->min > val) ||
  		    (param->max && *param->max < val))
  			return -EINVAL;
  		*valp = val;
  	} else {
  		int val = *valp;
  		if (val < 0) {
  			*negp = -1;
  			*lvalp = (unsigned long)-val;
  		} else {
  			*negp = 0;
  			*lvalp = (unsigned long)val;
  		}
  	}
  	return 0;
  }
  
  /**
   * proc_dointvec_minmax - read a vector of integers with min/max values
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
   * values from/to the user buffer, treated as an ASCII string.
   *
   * This routine will ensure the values are within the range specified by
   * table->extra1 (min) and table->extra2 (max).
   *
   * Returns 0 on success.
   */

  int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	struct do_proc_dointvec_minmax_conv_param param = {
  		.min = (int *) table->extra1,
  		.max = (int *) table->extra2,
  	};
  	return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
  				do_proc_dointvec_minmax_conv, &param);
  }

  static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int write,

  				     struct file *filp,
  				     void __user *buffer,
  				     size_t *lenp, loff_t *ppos,
  				     unsigned long convmul,
  				     unsigned long convdiv)
  {
  #define TMPBUFLEN 21
  	unsigned long *i, *min, *max, val;
  	int vleft, first=1, neg;
  	size_t len, left;
  	char buf[TMPBUFLEN], *p;
  	char __user *s = buffer;
  	

  	if (!data || !table->maxlen || !*lenp ||

  	    (*ppos && !write)) {
  		*lenp = 0;
  		return 0;
  	}
  	

  	i = (unsigned long *) data;

  	min = (unsigned long *) table->extra1;
  	max = (unsigned long *) table->extra2;
  	vleft = table->maxlen / sizeof(unsigned long);
  	left = *lenp;
  	
  	for (; left && vleft--; i++, min++, max++, first=0) {
  		if (write) {
  			while (left) {
  				char c;
  				if (get_user(c, s))
  					return -EFAULT;
  				if (!isspace(c))
  					break;
  				left--;
  				s++;
  			}
  			if (!left)
  				break;
  			neg = 0;
  			len = left;
  			if (len > TMPBUFLEN-1)
  				len = TMPBUFLEN-1;
  			if (copy_from_user(buf, s, len))
  				return -EFAULT;
  			buf[len] = 0;
  			p = buf;
  			if (*p == '-' && left > 1) {
  				neg = 1;

  				p++;

  			}
  			if (*p < '0' || *p > '9')
  				break;
  			val = simple_strtoul(p, &p, 0) * convmul / convdiv ;
  			len = p-buf;
  			if ((len < left) && *p && !isspace(*p))
  				break;
  			if (neg)
  				val = -val;
  			s += len;
  			left -= len;
  
  			if(neg)
  				continue;
  			if ((min && val < *min) || (max && val > *max))
  				continue;
  			*i = val;
  		} else {
  			p = buf;
  			if (!first)
  				*p++ = '\t';
  			sprintf(p, "%lu", convdiv * (*i) / convmul);
  			len = strlen(buf);
  			if (len > left)
  				len = left;
  			if(copy_to_user(s, buf, len))
  				return -EFAULT;
  			left -= len;
  			s += len;
  		}
  	}
  
  	if (!write && !first && left) {
  		if(put_user('
  ', s))
  			return -EFAULT;
  		left--, s++;
  	}
  	if (write) {
  		while (left) {
  			char c;
  			if (get_user(c, s++))
  				return -EFAULT;
  			if (!isspace(c))
  				break;
  			left--;
  		}
  	}
  	if (write && first)
  		return -EINVAL;
  	*lenp -= left;
  	*ppos += *lenp;
  	return 0;
  #undef TMPBUFLEN
  }

  static int do_proc_doulongvec_minmax(struct ctl_table *table, int write,

  				     struct file *filp,
  				     void __user *buffer,
  				     size_t *lenp, loff_t *ppos,
  				     unsigned long convmul,
  				     unsigned long convdiv)
  {
  	return __do_proc_doulongvec_minmax(table->data, table, write,
  			filp, buffer, lenp, ppos, convmul, convdiv);
  }

  /**
   * proc_doulongvec_minmax - read a vector of long integers with min/max values
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
   * values from/to the user buffer, treated as an ASCII string.
   *
   * This routine will ensure the values are within the range specified by
   * table->extra1 (min) and table->extra2 (max).
   *
   * Returns 0 on success.
   */

  int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,

  			   void __user *buffer, size_t *lenp, loff_t *ppos)
  {
      return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l);
  }
  
  /**
   * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
   * values from/to the user buffer, treated as an ASCII string. The values
   * are treated as milliseconds, and converted to jiffies when they are stored.
   *
   * This routine will ensure the values are within the range specified by
   * table->extra1 (min) and table->extra2 (max).
   *
   * Returns 0 on success.
   */

  int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,

  				      struct file *filp,
  				      void __user *buffer,
  				      size_t *lenp, loff_t *ppos)
  {
      return do_proc_doulongvec_minmax(table, write, filp, buffer,
  				     lenp, ppos, HZ, 1000l);
  }
  
  
  static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp,
  					 int *valp,
  					 int write, void *data)
  {
  	if (write) {

  		if (*lvalp > LONG_MAX / HZ)
  			return 1;

  		*valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
  	} else {
  		int val = *valp;
  		unsigned long lval;
  		if (val < 0) {
  			*negp = -1;
  			lval = (unsigned long)-val;
  		} else {
  			*negp = 0;
  			lval = (unsigned long)val;
  		}
  		*lvalp = lval / HZ;
  	}
  	return 0;
  }
  
  static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp,
  						int *valp,
  						int write, void *data)
  {
  	if (write) {

  		if (USER_HZ < HZ && *lvalp > (LONG_MAX / HZ) * USER_HZ)
  			return 1;

  		*valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
  	} else {
  		int val = *valp;
  		unsigned long lval;
  		if (val < 0) {
  			*negp = -1;
  			lval = (unsigned long)-val;
  		} else {
  			*negp = 0;
  			lval = (unsigned long)val;
  		}
  		*lvalp = jiffies_to_clock_t(lval);
  	}
  	return 0;
  }
  
  static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp,
  					    int *valp,
  					    int write, void *data)
  {
  	if (write) {
  		*valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
  	} else {
  		int val = *valp;
  		unsigned long lval;
  		if (val < 0) {
  			*negp = -1;
  			lval = (unsigned long)-val;
  		} else {
  			*negp = 0;
  			lval = (unsigned long)val;
  		}
  		*lvalp = jiffies_to_msecs(lval);
  	}
  	return 0;
  }
  
  /**
   * proc_dointvec_jiffies - read a vector of integers as seconds
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer
   * @ppos: file position
   *
   * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
   * values from/to the user buffer, treated as an ASCII string. 
   * The values read are assumed to be in seconds, and are converted into
   * jiffies.
   *
   * Returns 0 on success.
   */

  int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,

  			  void __user *buffer, size_t *lenp, loff_t *ppos)
  {
      return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
  		    	    do_proc_dointvec_jiffies_conv,NULL);
  }
  
  /**
   * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer

   * @ppos: pointer to the file position

   *
   * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
   * values from/to the user buffer, treated as an ASCII string. 
   * The values read are assumed to be in 1/USER_HZ seconds, and 
   * are converted into jiffies.
   *
   * Returns 0 on success.
   */

  int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,

  				 void __user *buffer, size_t *lenp, loff_t *ppos)
  {
      return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
  		    	    do_proc_dointvec_userhz_jiffies_conv,NULL);
  }
  
  /**
   * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
   * @table: the sysctl table
   * @write: %TRUE if this is a write to the sysctl file
   * @filp: the file structure
   * @buffer: the user buffer
   * @lenp: the size of the user buffer

   * @ppos: file position
   * @ppos: the current position in the file

   *
   * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
   * values from/to the user buffer, treated as an ASCII string. 
   * The values read are assumed to be in 1/1000 seconds, and 
   * are converted into jiffies.
   *
   * Returns 0 on success.
   */

  int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,

  			     void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
  				do_proc_dointvec_ms_jiffies_conv, NULL);
  }

  static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp,

  			   void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	struct pid *new_pid;
  	pid_t tmp;
  	int r;

  	tmp = pid_vnr(cad_pid);

  
  	r = __do_proc_dointvec(&tmp, table, write, filp, buffer,
  			       lenp, ppos, NULL, NULL);
  	if (r || !write)
  		return r;
  
  	new_pid = find_get_pid(tmp);
  	if (!new_pid)
  		return -ESRCH;
  
  	put_pid(xchg(&cad_pid, new_pid));
  	return 0;
  }

  #else /* CONFIG_PROC_FS */

  int proc_dostring(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_dointvec(struct ctl_table *table, int write, struct file *filp,

  		  void __user *buffer, size_t *lenp, loff_t *ppos)

  {
  	return -ENOSYS;
  }

  int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,

  		    void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_dointvec_jiffies(struct ctl_table *table, int write, struct file *filp,

  		    void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write, struct file *filp,

  		    void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_dointvec_ms_jiffies(struct ctl_table *table, int write, struct file *filp,

  			     void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_doulongvec_minmax(struct ctl_table *table, int write, struct file *filp,

  		    void __user *buffer, size_t *lenp, loff_t *ppos)
  {
  	return -ENOSYS;
  }

  int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,

  				      struct file *filp,
  				      void __user *buffer,
  				      size_t *lenp, loff_t *ppos)
  {
      return -ENOSYS;
  }
  
  
  #endif /* CONFIG_PROC_FS */

  #ifdef CONFIG_SYSCTL_SYSCALL

  /*
   * General sysctl support routines 
   */

  /* The generic sysctl data routine (used if no strategy routine supplied) */

  int sysctl_data(struct ctl_table *table,

  		void __user *oldval, size_t __user *oldlenp,
  		void __user *newval, size_t newlen)
  {
  	size_t len;
  
  	/* Get out of I don't have a variable */
  	if (!table->data || !table->maxlen)
  		return -ENOTDIR;
  
  	if (oldval && oldlenp) {
  		if (get_user(len, oldlenp))
  			return -EFAULT;
  		if (len) {
  			if (len > table->maxlen)
  				len = table->maxlen;
  			if (copy_to_user(oldval, table->data, len))
  				return -EFAULT;
  			if (put_user(len, oldlenp))
  				return -EFAULT;
  		}
  	}
  
  	if (newval && newlen) {
  		if (newlen > table->maxlen)
  			newlen = table->maxlen;
  
  		if (copy_from_user(table->data, newval, newlen))
  			return -EFAULT;
  	}
  	return 1;
  }

  /* The generic string strategy routine: */

  int sysctl_string(struct ctl_table *table,

  		  void __user *oldval, size_t __user *oldlenp,

  		  void __user *newval, size_t newlen)

  {

  	if (!table->data || !table->maxlen) 
  		return -ENOTDIR;
  	
  	if (oldval && oldlenp) {

  		size_t bufsize;
  		if (get_user(bufsize, oldlenp))

  			return -EFAULT;

  		if (bufsize) {
  			size_t len = strlen(table->data), copied;
  
  			/* This shouldn't trigger for a well-formed sysctl */
  			if (len > table->maxlen)

  				len = table->maxlen;

  
  			/* Copy up to a max of bufsize-1 bytes of the string */
  			copied = (len >= bufsize) ? bufsize - 1 : len;
  
  			if (copy_to_user(oldval, table->data, copied) ||
  			    put_user(0, (char __user *)(oldval + copied)))

  				return -EFAULT;

  			if (put_user(len, oldlenp))

  				return -EFAULT;
  		}
  	}
  	if (newval && newlen) {

  		size_t len = newlen;

  		if (len > table->maxlen)
  			len = table->maxlen;
  		if(copy_from_user(table->data, newval, len))
  			return -EFAULT;
  		if (len == table->maxlen)
  			len--;
  		((char *) table->data)[len] = 0;
  	}

  	return 1;

  }
  
  /*
   * This function makes sure that all of the integers in the vector
   * are between the minimum and maximum values given in the arrays
   * table->extra1 and table->extra2, respectively.
   */

  int sysctl_intvec(struct ctl_table *table,

  		void __user *oldval, size_t __user *oldlenp,

  		void __user *newval, size_t newlen)

  {
  
  	if (newval && newlen) {
  		int __user *vec = (int __user *) newval;
  		int *min = (int *) table->extra1;
  		int *max = (int *) table->extra2;
  		size_t length;
  		int i;
  
  		if (newlen % sizeof(int) != 0)
  			return -EINVAL;
  
  		if (!table->extra1 && !table->extra2)
  			return 0;
  
  		if (newlen > table->maxlen)
  			newlen = table->maxlen;
  		length = newlen / sizeof(int);
  
  		for (i = 0; i < length; i++) {
  			int value;
  			if (get_user(value, vec + i))
  				return -EFAULT;
  			if (min && value < min[i])
  				return -EINVAL;
  			if (max && value > max[i])
  				return -EINVAL;
  		}
  	}
  	return 0;
  }
  
  /* Strategy function to convert jiffies to seconds */ 

  int sysctl_jiffies(struct ctl_table *table,

  		void __user *oldval, size_t __user *oldlenp,

  		void __user *newval, size_t newlen)