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init/main.c
24.7 KB
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/* * linux/init/main.c * * Copyright (C) 1991, 1992 Linus Torvalds * * GK 2/5/95 - Changed to support mounting root fs via NFS * Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96 * Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96 |
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* Simplified starting of init: Michael A. Griffith <grif@acm.org> |
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*/ |
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#define DEBUG /* Enable initcall_debug */ |
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#include <linux/types.h> #include <linux/module.h> #include <linux/proc_fs.h> |
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#include <linux/kernel.h> #include <linux/syscalls.h> |
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#include <linux/stackprotector.h> |
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#include <linux/string.h> #include <linux/ctype.h> #include <linux/delay.h> |
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#include <linux/ioport.h> #include <linux/init.h> |
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#include <linux/initrd.h> |
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#include <linux/bootmem.h> |
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#include <linux/acpi.h> |
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#include <linux/tty.h> |
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#include <linux/percpu.h> #include <linux/kmod.h> |
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#include <linux/vmalloc.h> |
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#include <linux/kernel_stat.h> |
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#include <linux/start_kernel.h> |
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#include <linux/security.h> |
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#include <linux/smp.h> |
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#include <linux/profile.h> #include <linux/rcupdate.h> #include <linux/moduleparam.h> #include <linux/kallsyms.h> #include <linux/writeback.h> #include <linux/cpu.h> #include <linux/cpuset.h> |
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#include <linux/cgroup.h> |
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#include <linux/efi.h> |
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#include <linux/tick.h> |
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#include <linux/interrupt.h> |
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#include <linux/taskstats_kern.h> |
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#include <linux/delayacct.h> |
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#include <linux/unistd.h> #include <linux/rmap.h> #include <linux/mempolicy.h> #include <linux/key.h> |
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#include <linux/buffer_head.h> |
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#include <linux/page_ext.h> |
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#include <linux/debug_locks.h> |
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#include <linux/debugobjects.h> |
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#include <linux/lockdep.h> |
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#include <linux/kmemleak.h> |
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#include <linux/pid_namespace.h> |
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#include <linux/device.h> |
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#include <linux/kthread.h> |
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#include <linux/sched.h> |
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#include <linux/signal.h> |
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#include <linux/idr.h> |
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#include <linux/kgdb.h> |
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#include <linux/ftrace.h> |
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#include <linux/async.h> |
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#include <linux/kmemcheck.h> |
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#include <linux/sfi.h> |
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#include <linux/shmem_fs.h> |
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#include <linux/slab.h> |
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#include <linux/perf_event.h> |
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#include <linux/file.h> |
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#include <linux/ptrace.h> |
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#include <linux/blkdev.h> #include <linux/elevator.h> |
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#include <linux/sched_clock.h> |
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#include <linux/context_tracking.h> |
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#include <linux/random.h> |
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#include <linux/list.h> |
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#include <linux/integrity.h> |
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#include <linux/proc_ns.h> |
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#include <linux/io.h> |
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#include <asm/io.h> #include <asm/bugs.h> #include <asm/setup.h> |
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#include <asm/sections.h> |
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#include <asm/cacheflush.h> |
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|
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static int kernel_init(void *); |
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extern void init_IRQ(void); |
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extern void fork_init(void); |
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extern void radix_tree_init(void); |
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#ifndef CONFIG_DEBUG_RODATA static inline void mark_rodata_ro(void) { } #endif |
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/* * Debug helper: via this flag we know that we are in 'early bootup code' * where only the boot processor is running with IRQ disabled. This means * two things - IRQ must not be enabled before the flag is cleared and some * operations which are not allowed with IRQ disabled are allowed while the * flag is set. */ bool early_boot_irqs_disabled __read_mostly; |
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enum system_states system_state __read_mostly; |
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EXPORT_SYMBOL(system_state); /* * Boot command-line arguments */ #define MAX_INIT_ARGS CONFIG_INIT_ENV_ARG_LIMIT #define MAX_INIT_ENVS CONFIG_INIT_ENV_ARG_LIMIT extern void time_init(void); /* Default late time init is NULL. archs can override this later. */ |
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void (*__initdata late_time_init)(void); |
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/* Untouched command line saved by arch-specific code. */ char __initdata boot_command_line[COMMAND_LINE_SIZE]; /* Untouched saved command line (eg. for /proc) */ char *saved_command_line; /* Command line for parameter parsing */ static char *static_command_line; |
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/* Command line for per-initcall parameter parsing */ static char *initcall_command_line; |
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static char *execute_command; |
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static char *ramdisk_execute_command; |
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|
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/* |
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* Used to generate warnings if static_key manipulation functions are used * before jump_label_init is called. */ |
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bool static_key_initialized __read_mostly; |
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EXPORT_SYMBOL_GPL(static_key_initialized); /* |
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* If set, this is an indication to the drivers that reset the underlying * device before going ahead with the initialization otherwise driver might * rely on the BIOS and skip the reset operation. * * This is useful if kernel is booting in an unreliable environment. |
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* For ex. kdump situation where previous kernel has crashed, BIOS has been |
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* skipped and devices will be in unknown state. */ unsigned int reset_devices; EXPORT_SYMBOL(reset_devices); |
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static int __init set_reset_devices(char *str) { reset_devices = 1; return 1; } __setup("reset_devices", set_reset_devices); |
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static const char *argv_init[MAX_INIT_ARGS+2] = { "init", NULL, }; const char *envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, }; |
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static const char *panic_later, *panic_param; |
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extern const struct obs_kernel_param __setup_start[], __setup_end[]; |
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static int __init obsolete_checksetup(char *line) { |
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const struct obs_kernel_param *p; |
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int had_early_param = 0; |
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p = __setup_start; do { int n = strlen(p->str); |
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if (parameqn(line, p->str, n)) { |
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if (p->early) { |
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/* Already done in parse_early_param? * (Needs exact match on param part). * Keep iterating, as we can have early * params and __setups of same names 8( */ |
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if (line[n] == '\0' || line[n] == '=') |
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had_early_param = 1; |
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} else if (!p->setup_func) { |
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pr_warn("Parameter %s is obsolete, ignored ", p->str); |
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return 1; } else if (p->setup_func(line + n)) return 1; } p++; } while (p < __setup_end); |
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return had_early_param; |
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} /* * This should be approx 2 Bo*oMips to start (note initial shift), and will * still work even if initially too large, it will just take slightly longer */ unsigned long loops_per_jiffy = (1<<12); |
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EXPORT_SYMBOL(loops_per_jiffy); static int __init debug_kernel(char *str) { |
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console_loglevel = CONSOLE_LOGLEVEL_DEBUG; |
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return 0; |
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} static int __init quiet_kernel(char *str) { |
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console_loglevel = CONSOLE_LOGLEVEL_QUIET; |
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return 0; |
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} |
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early_param("debug", debug_kernel); early_param("quiet", quiet_kernel); |
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static int __init loglevel(char *str) { |
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int newlevel; /* * Only update loglevel value when a correct setting was passed, * to prevent blind crashes (when loglevel being set to 0) that * are quite hard to debug */ if (get_option(&str, &newlevel)) { console_loglevel = newlevel; return 0; } return -EINVAL; |
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} |
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early_param("loglevel", loglevel); |
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|
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/* Change NUL term back to "=", to make "param" the whole string. */ |
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static int __init repair_env_string(char *param, char *val, const char *unused, void *arg) |
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{ |
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if (val) { /* param=val or param="val"? */ if (val == param+strlen(param)+1) val[-1] = '='; else if (val == param+strlen(param)+2) { val[-2] = '='; memmove(val-1, val, strlen(val)+1); val--; } else BUG(); } |
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return 0; } |
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/* Anything after -- gets handed straight to init. */ |
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static int __init set_init_arg(char *param, char *val, const char *unused, void *arg) |
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{ unsigned int i; if (panic_later) return 0; |
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repair_env_string(param, val, unused, NULL); |
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for (i = 0; argv_init[i]; i++) { if (i == MAX_INIT_ARGS) { panic_later = "init"; panic_param = param; return 0; } } argv_init[i] = param; return 0; } |
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/* * Unknown boot options get handed to init, unless they look like * unused parameters (modprobe will find them in /proc/cmdline). */ |
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static int __init unknown_bootoption(char *param, char *val, const char *unused, void *arg) |
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{ |
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repair_env_string(param, val, unused, NULL); |
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/* Handle obsolete-style parameters */ if (obsolete_checksetup(param)) return 0; |
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/* Unused module parameter. */ if (strchr(param, '.') && (!val || strchr(param, '.') < val)) |
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return 0; |
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if (panic_later) return 0; if (val) { /* Environment option */ unsigned int i; for (i = 0; envp_init[i]; i++) { if (i == MAX_INIT_ENVS) { |
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panic_later = "env"; |
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panic_param = param; } if (!strncmp(param, envp_init[i], val - param)) break; } envp_init[i] = param; } else { /* Command line option */ unsigned int i; for (i = 0; argv_init[i]; i++) { if (i == MAX_INIT_ARGS) { |
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panic_later = "init"; |
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panic_param = param; } } argv_init[i] = param; } return 0; } static int __init init_setup(char *str) { unsigned int i; execute_command = str; /* * In case LILO is going to boot us with default command line, * it prepends "auto" before the whole cmdline which makes * the shell think it should execute a script with such name. * So we ignore all arguments entered _before_ init=... [MJ] */ for (i = 1; i < MAX_INIT_ARGS; i++) argv_init[i] = NULL; return 1; } __setup("init=", init_setup); |
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static int __init rdinit_setup(char *str) { unsigned int i; ramdisk_execute_command = str; /* See "auto" comment in init_setup */ for (i = 1; i < MAX_INIT_ARGS; i++) argv_init[i] = NULL; return 1; } __setup("rdinit=", rdinit_setup); |
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#ifndef CONFIG_SMP |
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static const unsigned int setup_max_cpus = NR_CPUS; |
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static inline void setup_nr_cpu_ids(void) { } |
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static inline void smp_prepare_cpus(unsigned int maxcpus) { } |
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#endif /* |
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* We need to store the untouched command line for future reference. * We also need to store the touched command line since the parameter * parsing is performed in place, and we should allow a component to * store reference of name/value for future reference. */ static void __init setup_command_line(char *command_line) { |
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saved_command_line = memblock_virt_alloc(strlen(boot_command_line) + 1, 0); initcall_command_line = memblock_virt_alloc(strlen(boot_command_line) + 1, 0); static_command_line = memblock_virt_alloc(strlen(command_line) + 1, 0); |
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strcpy(saved_command_line, boot_command_line); strcpy(static_command_line, command_line); |
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} /* |
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* We need to finalize in a non-__init function or else race conditions * between the root thread and the init thread may cause start_kernel to * be reaped by free_initmem before the root thread has proceeded to * cpu_idle. * * gcc-3.4 accidentally inlines this function, so use noinline. */ |
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static __initdata DECLARE_COMPLETION(kthreadd_done); |
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static noinline void __init_refok rest_init(void) |
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{ |
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int pid; |
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rcu_scheduler_starting(); |
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smpboot_thread_init(); |
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/* |
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* We need to spawn init first so that it obtains pid 1, however |
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* the init task will end up wanting to create kthreads, which, if * we schedule it before we create kthreadd, will OOPS. */ |
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kernel_thread(kernel_init, NULL, CLONE_FS); |
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numa_default_policy(); |
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pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES); |
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rcu_read_lock(); |
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kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns); |
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rcu_read_unlock(); |
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complete(&kthreadd_done); |
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/* * The boot idle thread must execute schedule() |
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* at least once to get things moving: |
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*/ |
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init_idle_bootup_task(current); |
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schedule_preempt_disabled(); |
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/* Call into cpu_idle with preempt disabled */ |
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cpu_startup_entry(CPUHP_ONLINE); |
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} |
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/* Check for early params. */ |
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static int __init do_early_param(char *param, char *val, const char *unused, void *arg) |
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{ |
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const struct obs_kernel_param *p; |
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for (p = __setup_start; p < __setup_end; p++) { |
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if ((p->early && parameq(param, p->str)) || |
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(strcmp(param, "console") == 0 && strcmp(p->str, "earlycon") == 0) ) { |
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if (p->setup_func(val) != 0) |
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pr_warn("Malformed early option '%s' ", param); |
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} } /* We accept everything at this stage. */ return 0; } |
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void __init parse_early_options(char *cmdline) { |
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parse_args("early options", cmdline, NULL, 0, 0, 0, NULL, do_early_param); |
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} |
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/* Arch code calls this early on, or if not, just before other parsing. */ void __init parse_early_param(void) { |
dd4d9fecb init/main.c: code... |
427 428 |
static int done __initdata; static char tmp_cmdline[COMMAND_LINE_SIZE] __initdata; |
1da177e4c Linux-2.6.12-rc2 |
429 430 431 432 433 |
if (done) return; /* All fall through to do_early_param. */ |
30d7e0d46 [PATCH] Dynamic k... |
434 |
strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); |
13977091a Driver Core: earl... |
435 |
parse_early_options(tmp_cmdline); |
1da177e4c Linux-2.6.12-rc2 |
436 437 438 439 440 441 |
done = 1; } /* * Activate the first processor. */ |
44fd22992 [PATCH] Register ... |
442 443 444 445 |
static void __init boot_cpu_init(void) { int cpu = smp_processor_id(); /* Mark the boot cpu "present", "online" etc for SMP and UP case */ |
915441b60 cpumask: Use acce... |
446 |
set_cpu_online(cpu, true); |
933b0618d sched: Mark boot-... |
447 |
set_cpu_active(cpu, true); |
915441b60 cpumask: Use acce... |
448 449 |
set_cpu_present(cpu, true); set_cpu_possible(cpu, true); |
44fd22992 [PATCH] Register ... |
450 |
} |
839ad62e7 [POWERPC] Use __w... |
451 |
void __init __weak smp_setup_processor_id(void) |
033ab7f8e [PATCH] add smp_s... |
452 453 |
{ } |
eded09ccf FRV: gcc-4.1.2 al... |
454 |
# if THREAD_SIZE >= PAGE_SIZE |
8c9843e57 [POWERPC] Add thr... |
455 456 457 |
void __init __weak thread_info_cache_init(void) { } |
eded09ccf FRV: gcc-4.1.2 al... |
458 |
#endif |
8c9843e57 [POWERPC] Add thr... |
459 |
|
444f478f6 init: introduce m... |
460 461 462 463 464 |
/* * Set up kernel memory allocators */ static void __init mm_init(void) { |
eefa864b7 mm/page_ext: resu... |
465 466 467 468 469 |
/* * page_ext requires contiguous pages, * bigger than MAX_ORDER unless SPARSEMEM. */ page_ext_init_flatmem(); |
444f478f6 init: introduce m... |
470 471 |
mem_init(); kmem_cache_init(); |
099a19d91 percpu: allow lim... |
472 |
percpu_init_late(); |
b35f1819a mm: create a sepa... |
473 |
pgtable_init(); |
444f478f6 init: introduce m... |
474 |
vmalloc_init(); |
0ddab1d2e lib/ioremap.c: ad... |
475 |
ioremap_huge_init(); |
444f478f6 init: introduce m... |
476 |
} |
722a9f929 asmlinkage: Add e... |
477 |
asmlinkage __visible void __init start_kernel(void) |
1da177e4c Linux-2.6.12-rc2 |
478 |
{ |
dd4d9fecb init/main.c: code... |
479 480 |
char *command_line; char *after_dashes; |
033ab7f8e [PATCH] add smp_s... |
481 |
|
fbb9ce953 [PATCH] lockdep: ... |
482 483 484 485 486 |
/* * Need to run as early as possible, to initialize the * lockdep hash: */ lockdep_init(); |
d4311ff1a init/main.c: Give... |
487 |
set_task_stack_end_magic(&init_task); |
73839c5b2 init/main.c: Exec... |
488 |
smp_setup_processor_id(); |
3ac7fe5a4 infrastructure to... |
489 |
debug_objects_early_init(); |
420594296 x86: fix the stac... |
490 491 492 493 494 |
/* * Set up the the initial canary ASAP: */ boot_init_stack_canary(); |
ddbcc7e8e Task Control Grou... |
495 |
cgroup_init_early(); |
fbb9ce953 [PATCH] lockdep: ... |
496 497 |
local_irq_disable(); |
2ce802f62 lockdep: Move ear... |
498 |
early_boot_irqs_disabled = true; |
fbb9ce953 [PATCH] lockdep: ... |
499 |
|
1da177e4c Linux-2.6.12-rc2 |
500 501 502 503 |
/* * Interrupts are still disabled. Do necessary setups, then * enable them */ |
44fd22992 [PATCH] Register ... |
504 |
boot_cpu_init(); |
1da177e4c Linux-2.6.12-rc2 |
505 |
page_address_init(); |
ea676e846 init/main.c: conv... |
506 |
pr_notice("%s", linux_banner); |
1da177e4c Linux-2.6.12-rc2 |
507 |
setup_arch(&command_line); |
6345d24da mm: Fix boot cras... |
508 |
mm_init_cpumask(&init_mm); |
30d7e0d46 [PATCH] Dynamic k... |
509 |
setup_command_line(command_line); |
e0982e90c init: move setup ... |
510 |
setup_nr_cpu_ids(); |
d6647bdf9 init: set nr_cpu_... |
511 |
setup_per_cpu_areas(); |
44fd22992 [PATCH] Register ... |
512 |
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ |
1da177e4c Linux-2.6.12-rc2 |
513 |
|
9adb62a5d mm/hotplug: corre... |
514 |
build_all_zonelists(NULL, NULL); |
83b519e8b slab: setup alloc... |
515 |
page_alloc_init(); |
ea676e846 init/main.c: conv... |
516 517 |
pr_notice("Kernel command line: %s ", boot_command_line); |
83b519e8b slab: setup alloc... |
518 |
parse_early_param(); |
51e158c12 param: hand argum... |
519 520 521 |
after_dashes = parse_args("Booting kernel", static_command_line, __start___param, __stop___param - __start___param, |
ecc861705 module: add extra... |
522 |
-1, -1, NULL, &unknown_bootoption); |
3438cf549 param: fix crash ... |
523 |
if (!IS_ERR_OR_NULL(after_dashes)) |
51e158c12 param: hand argum... |
524 |
parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, |
ecc861705 module: add extra... |
525 |
NULL, set_init_arg); |
97ce2c88f jump-label: initi... |
526 527 |
jump_label_init(); |
83b519e8b slab: setup alloc... |
528 529 530 531 |
/* * These use large bootmem allocations and must precede * kmem_cache_init() */ |
162a7e750 printk: allocate ... |
532 |
setup_log_buf(0); |
83b519e8b slab: setup alloc... |
533 |
pidhash_init(); |
83b519e8b slab: setup alloc... |
534 535 536 |
vfs_caches_init_early(); sort_main_extable(); trap_init(); |
444f478f6 init: introduce m... |
537 |
mm_init(); |
de03c72cf mm: convert mm->c... |
538 |
|
1da177e4c Linux-2.6.12-rc2 |
539 540 541 542 543 544 545 546 547 548 549 |
/* * Set up the scheduler prior starting any interrupts (such as the * timer interrupt). Full topology setup happens at smp_init() * time - but meanwhile we still have a functioning scheduler. */ sched_init(); /* * Disable preemption - early bootup scheduling is extremely * fragile until we cpu_idle() for the first time. */ preempt_disable(); |
dd4d9fecb init/main.c: code... |
550 551 552 |
if (WARN(!irqs_disabled(), "Interrupts were enabled *very* early, fixing it ")) |
c4a68306b [PATCH] start_ker... |
553 |
local_irq_disable(); |
9f58a205c init: Initialized... |
554 |
idr_init_cache(); |
1da177e4c Linux-2.6.12-rc2 |
555 |
rcu_init(); |
5f893b263 tracing: Move ena... |
556 557 558 |
/* trace_printk() and trace points may be used after this */ trace_init(); |
65f382fd0 context_tracking:... |
559 |
context_tracking_init(); |
773e3eb7b init: Move radix_... |
560 |
radix_tree_init(); |
0b8f1efad sparse irq_desc[]... |
561 562 |
/* init some links before init_ISA_irqs() */ early_irq_init(); |
1da177e4c Linux-2.6.12-rc2 |
563 |
init_IRQ(); |
ad2b13536 tick: Call tick_i... |
564 |
tick_init(); |
d6dd50e07 Merge branch 'cor... |
565 |
rcu_init_nohz(); |
1da177e4c Linux-2.6.12-rc2 |
566 |
init_timers(); |
c0a313296 [PATCH] hrtimer: ... |
567 |
hrtimers_init(); |
1da177e4c Linux-2.6.12-rc2 |
568 |
softirq_init(); |
ad596171e [PATCH] Time: Use... |
569 |
timekeeping_init(); |
88fecaa27 [PATCH] time init... |
570 |
time_init(); |
38ff87f77 sched_clock: Make... |
571 |
sched_clock_postinit(); |
9e6302056 perf: Use hrtimer... |
572 |
perf_event_init(); |
93e028148 [PATCH] lockdep: ... |
573 |
profile_init(); |
d8ad7d112 generic-ipi: Fix ... |
574 |
call_function_init(); |
f91eb62f7 init: scream bloo... |
575 576 |
WARN(!irqs_disabled(), "Interrupts were enabled early "); |
2ce802f62 lockdep: Move ear... |
577 |
early_boot_irqs_disabled = false; |
93e028148 [PATCH] lockdep: ... |
578 |
local_irq_enable(); |
dcce284a2 mm: Extend gfp ma... |
579 |
|
7e85ee0c1 slab,slub: don't ... |
580 |
kmem_cache_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
581 582 583 584 585 586 587 588 |
/* * HACK ALERT! This is early. We're enabling the console before * we've done PCI setups etc, and console_init() must be aware of * this. But we do want output early, in case something goes wrong. */ console_init(); if (panic_later) |
499a4584d init: fix possibl... |
589 590 |
panic("Too many boot %s vars at `%s'", panic_later, panic_param); |
fbb9ce953 [PATCH] lockdep: ... |
591 592 |
lockdep_info(); |
9a11b49a8 [PATCH] lockdep: ... |
593 594 595 596 597 598 |
/* * Need to run this when irqs are enabled, because it wants * to self-test [hard/soft]-irqs on/off lock inversion bugs * too: */ locking_selftest(); |
1da177e4c Linux-2.6.12-rc2 |
599 600 |
#ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && !initrd_below_start_ok && |
bd673c7c3 initrd: cast `ini... |
601 |
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) { |
ea676e846 init/main.c: conv... |
602 603 |
pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it. ", |
bd673c7c3 initrd: cast `ini... |
604 605 |
page_to_pfn(virt_to_page((void *)initrd_start)), min_low_pfn); |
1da177e4c Linux-2.6.12-rc2 |
606 607 608 |
initrd_start = 0; } #endif |
eefa864b7 mm/page_ext: resu... |
609 |
page_ext_init(); |
3ac7fe5a4 infrastructure to... |
610 |
debug_objects_mem_init(); |
9b090f2da kmemleak: Initial... |
611 |
kmemleak_init(); |
e7c8d5c99 [PATCH] node loca... |
612 |
setup_per_cpu_pageset(); |
1da177e4c Linux-2.6.12-rc2 |
613 614 615 |
numa_policy_init(); if (late_time_init) late_time_init(); |
fa84e9eec init: Move sched_... |
616 |
sched_clock_init(); |
1da177e4c Linux-2.6.12-rc2 |
617 618 |
calibrate_delay(); pidmap_init(); |
1da177e4c Linux-2.6.12-rc2 |
619 |
anon_vma_init(); |
c4e1acbb3 ACPI / init: Invo... |
620 |
acpi_early_init(); |
11520e5e7 Revert "x86-64/ef... |
621 |
#ifdef CONFIG_X86 |
83e681897 efi: Make 'efi_en... |
622 |
if (efi_enabled(EFI_RUNTIME_SERVICES)) |
11520e5e7 Revert "x86-64/ef... |
623 624 |
efi_enter_virtual_mode(); #endif |
197725de6 x86, espfix: Make... |
625 |
#ifdef CONFIG_X86_ESPFIX64 |
3891a04aa x86-64, espfix: D... |
626 627 628 |
/* Should be run before the first non-init thread is created */ init_espfix_bsp(); #endif |
8c9843e57 [POWERPC] Add thr... |
629 |
thread_info_cache_init(); |
d84f4f992 CRED: Inaugurate ... |
630 |
cred_init(); |
ff691f6e0 kernel/fork.c: ne... |
631 |
fork_init(); |
1da177e4c Linux-2.6.12-rc2 |
632 633 |
proc_caches_init(); buffer_init(); |
1da177e4c Linux-2.6.12-rc2 |
634 635 |
key_init(); security_init(); |
0b4b3827d x86, kgdb, init: ... |
636 |
dbg_late_init(); |
4248b0da4 fs, file table: r... |
637 |
vfs_caches_init(); |
1da177e4c Linux-2.6.12-rc2 |
638 639 640 |
signals_init(); /* rootfs populating might need page-writeback */ page_writeback_init(); |
1da177e4c Linux-2.6.12-rc2 |
641 |
proc_root_init(); |
e149ed2b8 take the targets ... |
642 |
nsfs_init(); |
1da177e4c Linux-2.6.12-rc2 |
643 |
cpuset_init(); |
695df2132 cpuset: initializ... |
644 |
cgroup_init(); |
c757249af [PATCH] per-task-... |
645 |
taskstats_init_early(); |
ca74e92b4 [PATCH] per-task-... |
646 |
delayacct_init(); |
1da177e4c Linux-2.6.12-rc2 |
647 648 |
check_bugs(); |
b064a8fa7 ACPI / init: Swit... |
649 |
acpi_subsystem_init(); |
6ae6996a4 SFI: add platform... |
650 |
sfi_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
651 |
|
83e681897 efi: Make 'efi_en... |
652 |
if (efi_enabled(EFI_RUNTIME_SERVICES)) { |
2223af389 efi: Fix the ACPI... |
653 |
efi_late_init(); |
785107923 efi: Defer freein... |
654 |
efi_free_boot_services(); |
2223af389 efi: Fix the ACPI... |
655 |
} |
785107923 efi: Defer freein... |
656 |
|
68bf21aa1 ftrace: mcount ca... |
657 |
ftrace_init(); |
1da177e4c Linux-2.6.12-rc2 |
658 659 660 |
/* Do the rest non-__init'ed, we're now alive */ rest_init(); } |
b99b87f70 kernel: construct... |
661 662 663 664 |
/* Call all constructor functions linked into the kernel. */ static void __init do_ctors(void) { #ifdef CONFIG_CONSTRUCTORS |
196a15b4e init/main.c: fix ... |
665 |
ctor_fn_t *fn = (ctor_fn_t *) __ctors_start; |
b99b87f70 kernel: construct... |
666 |
|
196a15b4e init/main.c: fix ... |
667 668 |
for (; fn < (ctor_fn_t *) __ctors_end; fn++) (*fn)(); |
b99b87f70 kernel: construct... |
669 670 |
#endif } |
2329abfa3 module_param: mak... |
671 |
bool initcall_debug; |
d0ea3d7d2 Make initcall_deb... |
672 |
core_param(initcall_debug, initcall_debug, bool, 0644); |
1da177e4c Linux-2.6.12-rc2 |
673 |
|
7b0b73d76 init/main.c: add ... |
674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 |
#ifdef CONFIG_KALLSYMS struct blacklist_entry { struct list_head next; char *buf; }; static __initdata_or_module LIST_HEAD(blacklisted_initcalls); static int __init initcall_blacklist(char *str) { char *str_entry; struct blacklist_entry *entry; /* str argument is a comma-separated list of functions */ do { str_entry = strsep(&str, ","); if (str_entry) { pr_debug("blacklisting initcall %s ", str_entry); entry = alloc_bootmem(sizeof(*entry)); entry->buf = alloc_bootmem(strlen(str_entry) + 1); strcpy(entry->buf, str_entry); list_add(&entry->next, &blacklisted_initcalls); } } while (str_entry); return 0; } static bool __init_or_module initcall_blacklisted(initcall_t fn) { struct list_head *tmp; struct blacklist_entry *entry; char *fn_name; fn_name = kasprintf(GFP_KERNEL, "%pf", fn); if (!fn_name) return false; list_for_each(tmp, &blacklisted_initcalls) { entry = list_entry(tmp, struct blacklist_entry, next); if (!strcmp(fn_name, entry->buf)) { pr_debug("initcall %s blacklisted ", fn_name); kfree(fn_name); return true; } } kfree(fn_name); return false; } #else static int __init initcall_blacklist(char *str) { pr_warn("initcall_blacklist requires CONFIG_KALLSYMS "); return 0; } static bool __init_or_module initcall_blacklisted(initcall_t fn) { return false; } #endif __setup("initcall_blacklist=", initcall_blacklist); |
e44612713 init/main.c: mark... |
740 |
static int __init_or_module do_one_initcall_debug(initcall_t fn) |
1da177e4c Linux-2.6.12-rc2 |
741 |
{ |
742390728 tracing/fastboot:... |
742 |
ktime_t calltime, delta, rettime; |
30dbb20e6 tracing: Remove b... |
743 744 |
unsigned long long duration; int ret; |
1da177e4c Linux-2.6.12-rc2 |
745 |
|
d62cf8152 init/main.c: don'... |
746 747 |
printk(KERN_DEBUG "calling %pF @ %i ", fn, task_pid_nr(current)); |
22c5c03b4 init/main.c: fix ... |
748 |
calltime = ktime_get(); |
30dbb20e6 tracing: Remove b... |
749 |
ret = fn(); |
22c5c03b4 init/main.c: fix ... |
750 751 752 |
rettime = ktime_get(); delta = ktime_sub(rettime, calltime); duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
d62cf8152 init/main.c: don'... |
753 754 |
printk(KERN_DEBUG "initcall %pF returned %d after %lld usecs ", |
ea676e846 init/main.c: conv... |
755 |
fn, ret, duration); |
1da177e4c Linux-2.6.12-rc2 |
756 |
|
22c5c03b4 init/main.c: fix ... |
757 758 |
return ret; } |
e44612713 init/main.c: mark... |
759 |
int __init_or_module do_one_initcall(initcall_t fn) |
22c5c03b4 init/main.c: fix ... |
760 761 762 |
{ int count = preempt_count(); int ret; |
ff1c8fac8 init: remove perm... |
763 |
char msgbuf[64]; |
22c5c03b4 init/main.c: fix ... |
764 |
|
7b0b73d76 init/main.c: add ... |
765 766 |
if (initcall_blacklisted(fn)) return -EPERM; |
22c5c03b4 init/main.c: fix ... |
767 768 769 770 |
if (initcall_debug) ret = do_one_initcall_debug(fn); else ret = fn(); |
8f0c45cdf enhance initcall_... |
771 |
|
e0df154f4 Split up 'do_init... |
772 |
msgbuf[0] = 0; |
e662e1cfd init: don't lose ... |
773 |
|
e0df154f4 Split up 'do_init... |
774 |
if (preempt_count() != count) { |
bf5d770bd init: Do not warn... |
775 |
sprintf(msgbuf, "preemption imbalance "); |
4a2b4b222 sched: Introduce ... |
776 |
preempt_count_set(count); |
1da177e4c Linux-2.6.12-rc2 |
777 |
} |
e0df154f4 Split up 'do_init... |
778 |
if (irqs_disabled()) { |
a76bfd0da initcalls: Fix m6... |
779 |
strlcat(msgbuf, "disabled interrupts ", sizeof(msgbuf)); |
e0df154f4 Split up 'do_init... |
780 781 |
local_irq_enable(); } |
f91eb62f7 init: scream bloo... |
782 783 |
WARN(msgbuf[0], "initcall %pF returned with %s ", fn, msgbuf); |
59f9415ff modules: extend i... |
784 |
|
30dbb20e6 tracing: Remove b... |
785 |
return ret; |
e0df154f4 Split up 'do_init... |
786 |
} |
026cee008 params: <level>_i... |
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 |
extern initcall_t __initcall_start[]; extern initcall_t __initcall0_start[]; extern initcall_t __initcall1_start[]; extern initcall_t __initcall2_start[]; extern initcall_t __initcall3_start[]; extern initcall_t __initcall4_start[]; extern initcall_t __initcall5_start[]; extern initcall_t __initcall6_start[]; extern initcall_t __initcall7_start[]; extern initcall_t __initcall_end[]; static initcall_t *initcall_levels[] __initdata = { __initcall0_start, __initcall1_start, __initcall2_start, __initcall3_start, __initcall4_start, __initcall5_start, __initcall6_start, __initcall7_start, __initcall_end, }; |
96263d286 init: add comment... |
809 |
/* Keep these in sync with initcalls in include/linux/init.h */ |
026cee008 params: <level>_i... |
810 |
static char *initcall_level_names[] __initdata = { |
9fb48c744 params: add 3rd a... |
811 812 813 814 815 816 817 818 |
"early", "core", "postcore", "arch", "subsys", "fs", "device", "late", |
026cee008 params: <level>_i... |
819 |
}; |
026cee008 params: <level>_i... |
820 |
static void __init do_initcall_level(int level) |
e0df154f4 Split up 'do_init... |
821 |
{ |
196a15b4e init/main.c: fix ... |
822 |
initcall_t *fn; |
e0df154f4 Split up 'do_init... |
823 |
|
08746a65c init: fix in-plac... |
824 |
strcpy(initcall_command_line, saved_command_line); |
026cee008 params: <level>_i... |
825 |
parse_args(initcall_level_names[level], |
08746a65c init: fix in-plac... |
826 |
initcall_command_line, __start___param, |
026cee008 params: <level>_i... |
827 828 |
__stop___param - __start___param, level, level, |
ecc861705 module: add extra... |
829 |
NULL, &repair_env_string); |
026cee008 params: <level>_i... |
830 831 |
for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++) |
196a15b4e init/main.c: fix ... |
832 |
do_one_initcall(*fn); |
1da177e4c Linux-2.6.12-rc2 |
833 |
} |
026cee008 params: <level>_i... |
834 835 836 |
static void __init do_initcalls(void) { int level; |
19efb72fd init: Drop initca... |
837 |
for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) |
026cee008 params: <level>_i... |
838 839 |
do_initcall_level(level); } |
1da177e4c Linux-2.6.12-rc2 |
840 841 842 843 844 845 846 847 848 |
/* * Ok, the machine is now initialized. None of the devices * have been touched yet, but the CPU subsystem is up and * running, and memory and process management works. * * Now we can finally start doing some real work.. */ static void __init do_basic_setup(void) { |
759ee0915 init,cpuset: fix ... |
849 |
cpuset_init_smp(); |
41ffe5d5c tmpfs: miscellane... |
850 |
shmem_init(); |
1da177e4c Linux-2.6.12-rc2 |
851 |
driver_init(); |
b04c3afb2 [PATCH] sysctl: m... |
852 |
init_irq_proc(); |
b99b87f70 kernel: construct... |
853 |
do_ctors(); |
d5767c535 bootup: move 'use... |
854 |
usermodehelper_enable(); |
b0f84374b bootup: move 'use... |
855 |
do_initcalls(); |
47d06e532 random: run rando... |
856 |
random_int_secret_init(); |
1da177e4c Linux-2.6.12-rc2 |
857 |
} |
7babe8db9 Full conversion t... |
858 |
static void __init do_pre_smp_initcalls(void) |
c2147a509 Better interface ... |
859 |
{ |
196a15b4e init/main.c: fix ... |
860 |
initcall_t *fn; |
c2147a509 Better interface ... |
861 |
|
026cee008 params: <level>_i... |
862 |
for (fn = __initcall_start; fn < __initcall0_start; fn++) |
196a15b4e init/main.c: fix ... |
863 |
do_one_initcall(*fn); |
c2147a509 Better interface ... |
864 |
} |
bb813f4c9 init, block: try ... |
865 866 867 868 869 870 871 872 873 874 |
/* * This function requests modules which should be loaded by default and is * called twice right after initrd is mounted and right before init is * exec'd. If such modules are on either initrd or rootfs, they will be * loaded before control is passed to userland. */ void __init load_default_modules(void) { load_default_elevator_module(); } |
a74fb73c1 infrastructure fo... |
875 |
static int run_init_process(const char *init_filename) |
1da177e4c Linux-2.6.12-rc2 |
876 877 |
{ argv_init[0] = init_filename; |
c4ad8f98b execve: use 'stru... |
878 |
return do_execve(getname_kernel(init_filename), |
ae903caae Bury the conditio... |
879 880 |
(const char __user *const __user *)argv_init, (const char __user *const __user *)envp_init); |
1da177e4c Linux-2.6.12-rc2 |
881 |
} |
ba24762bd init: make init f... |
882 883 884 885 886 887 888 889 890 891 892 893 894 895 |
static int try_to_run_init_process(const char *init_filename) { int ret; ret = run_init_process(init_filename); if (ret && ret != -ENOENT) { pr_err("Starting init: %s exists but couldn't execute it (error %d) ", init_filename, ret); } return ret; } |
f80b0c904 Ensure that kerne... |
896 |
static noinline void __init kernel_init_freeable(void); |
d6b212380 make sure that we... |
897 898 |
static int __ref kernel_init(void *unused) |
ee5bfa642 [PATCH] generic: ... |
899 |
{ |
ba24762bd init: make init f... |
900 |
int ret; |
d6b212380 make sure that we... |
901 |
kernel_init_freeable(); |
22a9d6456 async: Asynchrono... |
902 903 |
/* need to finish all async __init code before freeing the memory */ async_synchronize_full(); |
ee5bfa642 [PATCH] generic: ... |
904 |
free_initmem(); |
ee5bfa642 [PATCH] generic: ... |
905 906 907 |
mark_rodata_ro(); system_state = SYSTEM_RUNNING; numa_default_policy(); |
4a9d4b024 switch fput to ta... |
908 |
flush_delayed_fput(); |
fae5fa44f signals: fix /sbi... |
909 |
|
ee5bfa642 [PATCH] generic: ... |
910 |
if (ramdisk_execute_command) { |
ba24762bd init: make init f... |
911 912 |
ret = run_init_process(ramdisk_execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
913 |
return 0; |
ba24762bd init: make init f... |
914 915 916 |
pr_err("Failed to execute %s (error %d) ", ramdisk_execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
917 918 919 920 921 922 923 924 925 |
} /* * We try each of these until one succeeds. * * The Bourne shell can be used instead of init if we are * trying to recover a really broken machine. */ if (execute_command) { |
ba24762bd init: make init f... |
926 927 |
ret = run_init_process(execute_command); if (!ret) |
a74fb73c1 infrastructure fo... |
928 |
return 0; |
6ef4536e2 init: allow CONFI... |
929 930 |
panic("Requested init %s failed (error %d).", execute_command, ret); |
ee5bfa642 [PATCH] generic: ... |
931 |
} |
ba24762bd init: make init f... |
932 933 934 935 |
if (!try_to_run_init_process("/sbin/init") || !try_to_run_init_process("/etc/init") || !try_to_run_init_process("/bin/init") || !try_to_run_init_process("/bin/sh")) |
a74fb73c1 infrastructure fo... |
936 |
return 0; |
ee5bfa642 [PATCH] generic: ... |
937 |
|
ba24762bd init: make init f... |
938 |
panic("No working init found. Try passing init= option to kernel. " |
9a85b8d60 init/main.c: impr... |
939 |
"See Linux Documentation/init.txt for guidance."); |
ee5bfa642 [PATCH] generic: ... |
940 |
} |
f80b0c904 Ensure that kerne... |
941 |
static noinline void __init kernel_init_freeable(void) |
1da177e4c Linux-2.6.12-rc2 |
942 |
{ |
b433c3d45 init, sched: Fix ... |
943 944 945 946 |
/* * Wait until kthreadd is all set-up. */ wait_for_completion(&kthreadd_done); |
31a67102f Fix blocking allo... |
947 948 949 |
/* Now the scheduler is fully set up and can do blocking allocations */ gfp_allowed_mask = __GFP_BITS_MASK; |
58568d2a8 cpuset,mm: update... |
950 951 952 |
/* * init can allocate pages on any node */ |
3c466d46a init: use N_MEMOR... |
953 |
set_mems_allowed(node_states[N_MEMORY]); |
1da177e4c Linux-2.6.12-rc2 |
954 955 956 |
/* * init can run on any cpu. */ |
1a2142afa cpumask: remove d... |
957 |
set_cpus_allowed_ptr(current, cpu_all_mask); |
1da177e4c Linux-2.6.12-rc2 |
958 |
|
9ec52099e [PATCH] replace c... |
959 |
cad_pid = task_pid(current); |
ca74a6f84 x86: optimize loc... |
960 |
smp_prepare_cpus(setup_max_cpus); |
1da177e4c Linux-2.6.12-rc2 |
961 962 |
do_pre_smp_initcalls(); |
004417a6d perf, arch: Clean... |
963 |
lockup_detector_init(); |
1da177e4c Linux-2.6.12-rc2 |
964 |
|
1da177e4c Linux-2.6.12-rc2 |
965 966 |
smp_init(); sched_init_smp(); |
0e1cc95b4 mm: meminit: fini... |
967 |
page_alloc_init_late(); |
1da177e4c Linux-2.6.12-rc2 |
968 |
do_basic_setup(); |
2bd3a997b init: Open /dev/c... |
969 970 |
/* Open the /dev/console on the rootfs, this should never fail */ if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0) |
ea676e846 init/main.c: conv... |
971 972 |
pr_err("Warning: unable to open an initial console. "); |
2bd3a997b init: Open /dev/c... |
973 974 975 |
(void) sys_dup(0); (void) sys_dup(0); |
1da177e4c Linux-2.6.12-rc2 |
976 977 978 979 |
/* * check if there is an early userspace init. If yes, let it do all * the work */ |
ffdfc4097 [PATCH] Add rdini... |
980 981 982 983 984 985 |
if (!ramdisk_execute_command) ramdisk_execute_command = "/init"; if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) { ramdisk_execute_command = NULL; |
1da177e4c Linux-2.6.12-rc2 |
986 |
prepare_namespace(); |
ffdfc4097 [PATCH] Add rdini... |
987 |
} |
1da177e4c Linux-2.6.12-rc2 |
988 989 990 991 992 |
/* * Ok, we have completed the initial bootup, and * we're essentially up and running. Get rid of the * initmem segments and start the user-mode stuff.. |
c9cd2ce2b integrity: provid... |
993 994 995 |
* * rootfs is available now, try loading the public keys * and default modules |
1da177e4c Linux-2.6.12-rc2 |
996 |
*/ |
bb813f4c9 init, block: try ... |
997 |
|
c9cd2ce2b integrity: provid... |
998 |
integrity_load_keys(); |
bb813f4c9 init, block: try ... |
999 |
load_default_modules(); |
1da177e4c Linux-2.6.12-rc2 |
1000 |
} |