[PATCH] mark struct file_operations const 6

Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

[PATCH] mark struct file_operations const 6
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Arjan van de Ven · Linus Torvalds
1 parent d54b1fdb1d
Showing 45 changed files with 91 additions and 91 deletions Side-by-side Diff
drivers/sbus/char/bpp.c
drivers/sbus/char/cpwatchdog.c
drivers/sbus/char/display7seg.c
drivers/sbus/char/envctrl.c
drivers/sbus/char/flash.c
drivers/sbus/char/jsflash.c
drivers/sbus/char/openprom.c
drivers/sbus/char/riowatchdog.c
drivers/sbus/char/rtc.c
drivers/sbus/char/uctrl.c
drivers/sbus/char/vfc_dev.c
drivers/scsi/3w-9xxx.c
drivers/scsi/3w-xxxx.c
drivers/scsi/aacraid/linit.c
drivers/scsi/ch.c
drivers/scsi/dpt_i2o.c
drivers/scsi/gdth.c
drivers/scsi/megaraid.c
drivers/scsi/megaraid/megaraid_mm.c
drivers/scsi/megaraid/megaraid_sas.c
@@ -846,7 +846,7 @@
       return errno;
 }
  
-static struct file_operations bpp_fops = {
+static const struct file_operations bpp_fops = {
 	.owner =	THIS_MODULE,
 	.read =		bpp_read,
 	.write =	bpp_write,
@@ -459,7 +459,7 @@
 	return IRQ_HANDLED;
 }
  
-static struct file_operations wd_fops = {
+static const struct file_operations wd_fops = {
 	.owner =	THIS_MODULE,
 	.ioctl =	wd_ioctl,
 	.compat_ioctl =	wd_compat_ioctl,
@@ -166,7 +166,7 @@
 	return error;
 }
  
-static struct file_operations d7s_fops = {
+static const struct file_operations d7s_fops = {
 	.owner =		THIS_MODULE,
 	.unlocked_ioctl =	d7s_ioctl,
 	.compat_ioctl =		d7s_ioctl,
@@ -705,7 +705,7 @@
 	return 0;
 }
  
-static struct file_operations envctrl_fops = {
+static const struct file_operations envctrl_fops = {
 	.owner =		THIS_MODULE,
 	.read =			envctrl_read,
 	.unlocked_ioctl =	envctrl_ioctl,
@@ -142,7 +142,7 @@
 	return 0;
 }
  
-static struct file_operations flash_fops = {
+static const struct file_operations flash_fops = {
 	/* no write to the Flash, use mmap
 	 * and play flash dependent tricks.
 	 */
@@ -431,7 +431,7 @@
 	return 0;
 }
  
-static struct file_operations jsf_fops = {
+static const struct file_operations jsf_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	jsf_lseek,
 	.read =		jsf_read,
@@ -704,7 +704,7 @@
 	return 0;
 }
  
-static struct file_operations openprom_fops = {
+static const struct file_operations openprom_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.ioctl =	openprom_ioctl,
@@ -193,7 +193,7 @@
 	return 0;
 }
  
-static struct file_operations riowd_fops = {
+static const struct file_operations riowd_fops = {
 	.owner =	THIS_MODULE,
 	.ioctl =	riowd_ioctl,
 	.open =		riowd_open,
@@ -233,7 +233,7 @@
 	return 0;
 }
  
-static struct file_operations rtc_fops = {
+static const struct file_operations rtc_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.ioctl =	rtc_ioctl,
@@ -224,7 +224,7 @@
 	return IRQ_HANDLED;
 }
  
-static struct file_operations uctrl_fops = {
+static const struct file_operations uctrl_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.ioctl =	uctrl_ioctl,
@@ -44,7 +44,7 @@
 #include "vfc.h"
 #include <asm/vfc_ioctls.h>
  
-static struct file_operations vfc_fops;
+static const struct file_operations vfc_fops;
 struct vfc_dev **vfc_dev_lst;
 static char vfcstr[]="vfc";
 static unsigned char saa9051_init_array[VFC_SAA9051_NR] = {
@@ -633,7 +633,7 @@
 }
  
  
-static struct file_operations vfc_fops = {
+static const struct file_operations vfc_fops = {
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.ioctl =	vfc_ioctl,
@@ -197,7 +197,7 @@
 };
  
 /* File operations struct for character device */
-static struct file_operations twa_fops = {
+static const struct file_operations twa_fops = {
 	.owner		= THIS_MODULE,
 	.ioctl		= twa_chrdev_ioctl,
 	.open		= twa_chrdev_open,
@@ -1040,7 +1040,7 @@
 } /* End tw_chrdev_open() */
  
 /* File operations struct for character device */
-static struct file_operations tw_fops = {
+static const struct file_operations tw_fops = {
 	.owner		= THIS_MODULE,
 	.ioctl		= tw_chrdev_ioctl,
 	.open		= tw_chrdev_open,
@@ -774,7 +774,7 @@
 };
  
  
-static struct file_operations aac_cfg_fops = {
+static const struct file_operations aac_cfg_fops = {
 	.owner		= THIS_MODULE,
 	.ioctl		= aac_cfg_ioctl,
 #ifdef CONFIG_COMPAT
@@ -129,7 +129,7 @@
 	},
 };
  
-static struct file_operations changer_fops =
+static const struct file_operations changer_fops =
 {
 	.owner        = THIS_MODULE,
 	.open         = ch_open,
@@ -116,7 +116,7 @@
 static adpt_hba* hba_chain = NULL;
 static int hba_count = 0;
  
-static struct file_operations adpt_fops = {
+static const struct file_operations adpt_fops = {
 	.ioctl		= adpt_ioctl,
 	.open		= adpt_open,
 	.release	= adpt_close
@@ -687,7 +687,7 @@
 MODULE_LICENSE("GPL");
  
 /* ioctl interface */
-static struct file_operations gdth_fops = {
+static const struct file_operations gdth_fops = {
     .ioctl   = gdth_ioctl,
     .open    = gdth_open,
     .release = gdth_close,
@@ -92,7 +92,7 @@
 /*
  * The File Operations structure for the serial/ioctl interface of the driver
  */
-static struct file_operations megadev_fops = {
+static const struct file_operations megadev_fops = {
 	.owner		= THIS_MODULE,
 	.ioctl		= megadev_ioctl,
 	.open		= megadev_open,
@@ -67,7 +67,7 @@
  
 static wait_queue_head_t wait_q;
  
-static struct file_operations lsi_fops = {
+static const struct file_operations lsi_fops = {
 	.open	= mraid_mm_open,
 	.ioctl	= mraid_mm_ioctl,
 #ifdef CONFIG_COMPAT
@@ -2913,7 +2913,7 @@
 /*
  * File operations structure for management interface
  */
-static struct file_operations megasas_mgmt_fops = {
+static const struct file_operations megasas_mgmt_fops = {
 	.owner = THIS_MODULE,
 	.open = megasas_mgmt_open,
 	.release = megasas_mgmt_release,
@@ -5522,7 +5522,7 @@
  
 #endif
  
-static struct file_operations osst_fops = {
+static const struct file_operations osst_fops = {
 	.owner =        THIS_MODULE,
 	.read =         osst_read,
 	.write =        osst_write,
@@ -308,7 +308,7 @@
 	return single_open(file, proc_scsi_show, NULL);
 }
  
-static struct file_operations proc_scsi_operations = {
+static const struct file_operations proc_scsi_operations = {
 	.open		= proc_scsi_open,
 	.read		= seq_read,
 	.write		= proc_scsi_write,
@@ -280,7 +280,7 @@
 	return 0;
 }
  
-static struct file_operations tgt_fops = {
+static const struct file_operations tgt_fops = {
 	.owner		= THIS_MODULE,
 	.open		= tgt_open,
 	.poll		= tgt_poll,
@@ -3864,7 +3864,7 @@
  
 #endif
  
-static struct file_operations st_fops =
+static const struct file_operations st_fops =
 {
 	.owner =	THIS_MODULE,
 	.read =		st_read,
@@ -6663,7 +6663,7 @@
 	return fasync_helper(fd, file_p, mode, &j->async_queue);
 }
  
-static struct file_operations ixj_fops =
+static const struct file_operations ixj_fops =
 {
         .owner          = THIS_MODULE,
         .read           = ixj_enhanced_read,
@@ -127,7 +127,7 @@
 }
  
  
-static struct file_operations phone_fops =
+static const struct file_operations phone_fops =
 {
 	.owner		= THIS_MODULE,
 	.open		= phone_open,
@@ -644,7 +644,7 @@
 }
  
 /* file operations needed when we register this driver */
-static struct file_operations adu_fops = {
+static const struct file_operations adu_fops = {
 	.owner = THIS_MODULE,
 	.read  = adu_read,
 	.write = adu_write,
@@ -1209,7 +1209,7 @@
 	return retval;
 }
  
-static struct file_operations ftdi_elan_fops = {
+static const struct file_operations ftdi_elan_fops = {
         .owner = THIS_MODULE,
         .llseek = no_llseek,
         .ioctl = ftdi_elan_ioctl,
@@ -170,37 +170,37 @@
 }
  
  
-static struct file_operations sysconf_fops = {
+static const struct file_operations sysconf_fops = {
 	.read = sysconf_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };
  
-static struct file_operations clock_fops = {
+static const struct file_operations clock_fops = {
 	.read = clock_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };
  
-static struct file_operations display_fops = {
+static const struct file_operations display_fops = {
 	.read = display_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };
  
-static struct file_operations gsctl_fops = {
+static const struct file_operations gsctl_fops = {
 	.read = gsctl_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };
  
-static struct file_operations sdram_fops = {
+static const struct file_operations sdram_fops = {
 	.read = sdram_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
 };
  
-static struct file_operations misc_fops = {
+static const struct file_operations misc_fops = {
 	.read = misc_read_file,
 	.write = write_file_dummy,
 	.open = open_file_generic,
@@ -75,7 +75,7 @@
 	return nbytes;
 }
  
-static struct file_operations proc_bus_zorro_operations = {
+static const struct file_operations proc_bus_zorro_operations = {
 	.llseek		= proc_bus_zorro_lseek,
 	.read		= proc_bus_zorro_read,
 };
@@ -254,7 +254,7 @@
 			blob->size);
 }
  
-static struct file_operations fops_blob = {
+static const struct file_operations fops_blob = {
 	.read =		read_file_blob,
 	.open =		default_open,
 };
@@ -287,7 +287,7 @@
 	return 0;
 }
  
-static struct file_operations rsb_fops = {
+static const struct file_operations rsb_fops = {
 	.owner   = THIS_MODULE,
 	.open    = rsb_open,
 	.read    = seq_read,
@@ -331,7 +331,7 @@
 	return rv;
 }
  
-static struct file_operations waiters_fops = {
+static const struct file_operations waiters_fops = {
 	.owner   = THIS_MODULE,
 	.open    = waiters_open,
 	.read    = waiters_read
@@ -25,7 +25,7 @@
  
 static const char *name_prefix="dlm";
 static struct miscdevice ctl_device;
-static struct file_operations device_fops;
+static const struct file_operations device_fops;
  
 #ifdef CONFIG_COMPAT
  
@@ -759,7 +759,7 @@
 	return 0;
 }
  
-static struct file_operations device_fops = {
+static const struct file_operations device_fops = {
 	.open    = device_open,
 	.release = device_close,
 	.read    = device_read,
@@ -768,7 +768,7 @@
 	.owner   = THIS_MODULE,
 };
  
-static struct file_operations ctl_device_fops = {
+static const struct file_operations ctl_device_fops = {
 	.open    = ctl_device_open,
 	.release = ctl_device_close,
 	.write   = device_write,
@@ -264,7 +264,7 @@
 	return 0;
 }
  
-static struct file_operations dev_fops = {
+static const struct file_operations dev_fops = {
 	.read    = dev_read,
 	.write   = dev_write,
 	.poll    = dev_poll,
@@ -1173,7 +1173,7 @@
 	.show	= nfs_server_list_show,
 };
  
-static struct file_operations nfs_server_list_fops = {
+static const struct file_operations nfs_server_list_fops = {
 	.open		= nfs_server_list_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -1193,7 +1193,7 @@
 	.show	= nfs_volume_list_show,
 };
  
-static struct file_operations nfs_volume_list_fops = {
+static const struct file_operations nfs_volume_list_fops = {
 	.open		= nfs_volume_list_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -62,7 +62,7 @@
 #include "cluster/masklog.h"
  
 static struct super_operations dlmfs_ops;
-static struct file_operations dlmfs_file_operations;
+static const struct file_operations dlmfs_file_operations;
 static struct inode_operations dlmfs_dir_inode_operations;
 static struct inode_operations dlmfs_root_inode_operations;
 static struct inode_operations dlmfs_file_inode_operations;
@@ -540,7 +540,7 @@
 	return 0;
 }
  
-static struct file_operations dlmfs_file_operations = {
+static const struct file_operations dlmfs_file_operations = {
 	.open		= dlmfs_file_open,
 	.release	= dlmfs_file_release,
 	.read		= dlmfs_file_read,
@@ -94,7 +94,7 @@
 	char *name;
 	mode_t mode;
 	struct inode_operations *iop;
-	struct file_operations *fop;
+	const struct file_operations *fop;
 	union proc_op op;
 };
  
@@ -424,7 +424,7 @@
 	return res;
 }
  
-static struct file_operations proc_mounts_operations = {
+static const struct file_operations proc_mounts_operations = {
 	.open		= mounts_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -462,7 +462,7 @@
 	return ret;
 }
  
-static struct file_operations proc_mountstats_operations = {
+static const struct file_operations proc_mountstats_operations = {
 	.open		= mountstats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -501,7 +501,7 @@
 	return length;
 }
  
-static struct file_operations proc_info_file_operations = {
+static const struct file_operations proc_info_file_operations = {
 	.read		= proc_info_read,
 };
  
@@ -646,7 +646,7 @@
 	return file->f_pos;
 }
  
-static struct file_operations proc_mem_operations = {
+static const struct file_operations proc_mem_operations = {
 	.llseek		= mem_lseek,
 	.read		= mem_read,
 	.write		= mem_write,
@@ -710,7 +710,7 @@
 	return end - buffer;
 }
  
-static struct file_operations proc_oom_adjust_operations = {
+static const struct file_operations proc_oom_adjust_operations = {
 	.read		= oom_adjust_read,
 	.write		= oom_adjust_write,
 };
@@ -777,7 +777,7 @@
 	return length;
 }
  
-static struct file_operations proc_loginuid_operations = {
+static const struct file_operations proc_loginuid_operations = {
 	.read		= proc_loginuid_read,
 	.write		= proc_loginuid_write,
 };
@@ -849,7 +849,7 @@
 	return result;
 }
  
-static struct file_operations proc_seccomp_operations = {
+static const struct file_operations proc_seccomp_operations = {
 	.read		= seccomp_read,
 	.write		= seccomp_write,
 };
@@ -908,7 +908,7 @@
 	return end - buffer;
 }
  
-static struct file_operations proc_fault_inject_operations = {
+static const struct file_operations proc_fault_inject_operations = {
 	.read		= proc_fault_inject_read,
 	.write		= proc_fault_inject_write,
 };
@@ -1408,7 +1408,7 @@
 	return retval;
 }
  
-static struct file_operations proc_fd_operations = {
+static const struct file_operations proc_fd_operations = {
 	.read		= generic_read_dir,
 	.readdir	= proc_readfd,
 };
@@ -1623,7 +1623,7 @@
 	return length;
 }
  
-static struct file_operations proc_pid_attr_operations = {
+static const struct file_operations proc_pid_attr_operations = {
 	.read		= proc_pid_attr_read,
 	.write		= proc_pid_attr_write,
 };
@@ -1644,7 +1644,7 @@
 				   attr_dir_stuff,ARRAY_SIZE(attr_dir_stuff));
 }
  
-static struct file_operations proc_attr_dir_operations = {
+static const struct file_operations proc_attr_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= proc_attr_dir_readdir,
 };
@@ -1834,7 +1834,7 @@
 /*
  * Thread groups
  */
-static struct file_operations proc_task_operations;
+static const struct file_operations proc_task_operations;
 static struct inode_operations proc_task_inode_operations;
  
 static struct pid_entry tgid_base_stuff[] = {
@@ -1894,7 +1894,7 @@
 				   tgid_base_stuff,ARRAY_SIZE(tgid_base_stuff));
 }
  
-static struct file_operations proc_tgid_base_operations = {
+static const struct file_operations proc_tgid_base_operations = {
 	.read		= generic_read_dir,
 	.readdir	= proc_tgid_base_readdir,
 };
@@ -2177,7 +2177,7 @@
 				  tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
 }
  
-static struct file_operations proc_tid_base_operations = {
+static const struct file_operations proc_tid_base_operations = {
 	.read		= generic_read_dir,
 	.readdir	= proc_tid_base_readdir,
 };
@@ -2414,7 +2414,7 @@
 	.setattr	= proc_setattr,
 };
  
-static struct file_operations proc_task_operations = {
+static const struct file_operations proc_task_operations = {
 	.read		= generic_read_dir,
 	.readdir	= proc_task_readdir,
 };
@@ -39,7 +39,7 @@
 	return !memcmp(name, de->name, len);
 }
  
-static struct file_operations proc_file_operations = {
+static const struct file_operations proc_file_operations = {
 	.llseek		= proc_file_lseek,
 	.read		= proc_file_read,
 	.write		= proc_file_write,
@@ -497,7 +497,7 @@
  * use the in-memory "struct proc_dir_entry" tree to parse
  * the /proc directory.
  */
-static struct file_operations proc_dir_operations = {
+static const struct file_operations proc_dir_operations = {
 	.read			= generic_read_dir,
 	.readdir		= proc_readdir,
 };
@@ -38,13 +38,13 @@
 extern int proc_pid_status(struct task_struct *, char *);
 extern int proc_pid_statm(struct task_struct *, char *);
  
-extern struct file_operations proc_maps_operations;
-extern struct file_operations proc_numa_maps_operations;
-extern struct file_operations proc_smaps_operations;
+extern const struct file_operations proc_maps_operations;
+extern const struct file_operations proc_numa_maps_operations;
+extern const struct file_operations proc_smaps_operations;
  
-extern struct file_operations proc_maps_operations;
-extern struct file_operations proc_numa_maps_operations;
-extern struct file_operations proc_smaps_operations;
+extern const struct file_operations proc_maps_operations;
+extern const struct file_operations proc_numa_maps_operations;
+extern const struct file_operations proc_smaps_operations;
  
  
 void free_proc_entry(struct proc_dir_entry *de);
@@ -128,7 +128,7 @@
 	return seq_open(file, &proc_nommu_vma_list_seqop);
 }
  
-static struct file_operations proc_nommu_vma_list_operations = {
+static const struct file_operations proc_nommu_vma_list_operations = {
 	.open    = proc_nommu_vma_list_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
@@ -223,7 +223,7 @@
 	return seq_open(file, &fragmentation_op);
 }
  
-static struct file_operations fragmentation_file_operations = {
+static const struct file_operations fragmentation_file_operations = {
 	.open		= fragmentation_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -236,7 +236,7 @@
 	return seq_open(file, &zoneinfo_op);
 }
  
-static struct file_operations proc_zoneinfo_file_operations = {
+static const struct file_operations proc_zoneinfo_file_operations = {
 	.open		= zoneinfo_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -261,7 +261,7 @@
 	return seq_open(file, &cpuinfo_op);
 }
  
-static struct file_operations proc_cpuinfo_operations = {
+static const struct file_operations proc_cpuinfo_operations = {
 	.open		= cpuinfo_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -320,7 +320,7 @@
 	return seq_open(filp, &devinfo_ops);
 }
  
-static struct file_operations proc_devinfo_operations = {
+static const struct file_operations proc_devinfo_operations = {
 	.open		= devinfo_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -332,7 +332,7 @@
 {
 	return seq_open(file, &vmstat_op);
 }
-static struct file_operations proc_vmstat_file_operations = {
+static const struct file_operations proc_vmstat_file_operations = {
 	.open		= vmstat_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -363,7 +363,7 @@
 {
 	return seq_open(file, &partitions_op);
 }
-static struct file_operations proc_partitions_operations = {
+static const struct file_operations proc_partitions_operations = {
 	.open		= partitions_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -375,7 +375,7 @@
 {
 	return seq_open(file, &diskstats_op);
 }
-static struct file_operations proc_diskstats_operations = {
+static const struct file_operations proc_diskstats_operations = {
 	.open		= diskstats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -389,7 +389,7 @@
 {
 	return seq_open(file, &modules_op);
 }
-static struct file_operations proc_modules_operations = {
+static const struct file_operations proc_modules_operations = {
 	.open		= modules_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -404,7 +404,7 @@
 {
 	return seq_open(file, &slabinfo_op);
 }
-static struct file_operations proc_slabinfo_operations = {
+static const struct file_operations proc_slabinfo_operations = {
 	.open		= slabinfo_open,
 	.read		= seq_read,
 	.write		= slabinfo_write,
@@ -438,7 +438,7 @@
 	return seq_release(inode, file);
 }
  
-static struct file_operations proc_slabstats_operations = {
+static const struct file_operations proc_slabstats_operations = {
 	.open		= slabstats_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -551,7 +551,7 @@
 		kfree(buf);
 	return res;
 }
-static struct file_operations proc_stat_operations = {
+static const struct file_operations proc_stat_operations = {
 	.open		= stat_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -593,7 +593,7 @@
 	return seq_open(filp, &int_seq_ops);
 }
  
-static struct file_operations proc_interrupts_operations = {
+static const struct file_operations proc_interrupts_operations = {
 	.open		= interrupts_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -650,7 +650,7 @@
 	return count;
 }
  
-static struct file_operations proc_sysrq_trigger_operations = {
+static const struct file_operations proc_sysrq_trigger_operations = {
 	.write		= write_sysrq_trigger,
 };
 #endif
@@ -138,7 +138,7 @@
 	return seq_open(file, &tty_drivers_op);
 }
  
-static struct file_operations proc_tty_drivers_operations = {
+static const struct file_operations proc_tty_drivers_operations = {
 	.open		= tty_drivers_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -136,7 +136,7 @@
  * <pid> directories. Thus we don't use the generic
  * directory handling functions for that..
  */
-static struct file_operations proc_root_operations = {
+static const struct file_operations proc_root_operations = {
 	.read		 = generic_read_dir,
 	.readdir	 = proc_root_readdir,
 };
@@ -434,7 +434,7 @@
 	return do_maps_open(inode, file, &proc_pid_maps_op);
 }
  
-struct file_operations proc_maps_operations = {
+const struct file_operations proc_maps_operations = {
 	.open		= maps_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -456,7 +456,7 @@
 	return do_maps_open(inode, file, &proc_pid_numa_maps_op);
 }
  
-struct file_operations proc_numa_maps_operations = {
+const struct file_operations proc_numa_maps_operations = {
 	.open		= numa_maps_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -469,7 +469,7 @@
 	return do_maps_open(inode, file, &proc_pid_smaps_op);
 }
  
-struct file_operations proc_smaps_operations = {
+const struct file_operations proc_smaps_operations = {
 	.open		= smaps_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
@@ -220,7 +220,7 @@
 	return ret;
 }
  
-struct file_operations proc_maps_operations = {
+const struct file_operations proc_maps_operations = {
 	.open		= maps_open,
 	.read		= seq_read,
 	.llseek		= seq_lseek,
...	...	@@ -846,7 +846,7 @@
846	846	return errno;
847	847	}
848	848
849		-static struct file_operations bpp_fops = {
	849	+static const struct file_operations bpp_fops = {
850	850	.owner = THIS_MODULE,
851	851	.read = bpp_read,
852	852	.write = bpp_write,
...	...	@@ -459,7 +459,7 @@
459	459	return IRQ_HANDLED;
460	460	}
461	461
462		-static struct file_operations wd_fops = {
	462	+static const struct file_operations wd_fops = {
463	463	.owner = THIS_MODULE,
464	464	.ioctl = wd_ioctl,
465	465	.compat_ioctl = wd_compat_ioctl,
...	...	@@ -166,7 +166,7 @@
166	166	return error;
167	167	}
168	168
169		-static struct file_operations d7s_fops = {
	169	+static const struct file_operations d7s_fops = {
170	170	.owner = THIS_MODULE,
171	171	.unlocked_ioctl = d7s_ioctl,
172	172	.compat_ioctl = d7s_ioctl,
...	...	@@ -705,7 +705,7 @@
705	705	return 0;
706	706	}
707	707
708		-static struct file_operations envctrl_fops = {
	708	+static const struct file_operations envctrl_fops = {
709	709	.owner = THIS_MODULE,
710	710	.read = envctrl_read,
711	711	.unlocked_ioctl = envctrl_ioctl,
...	...	@@ -142,7 +142,7 @@
142	142	return 0;
143	143	}
144	144
145		-static struct file_operations flash_fops = {
	145	+static const struct file_operations flash_fops = {
146	146	/* no write to the Flash, use mmap
147	147	* and play flash dependent tricks.
148	148	*/
...	...	@@ -431,7 +431,7 @@
431	431	return 0;
432	432	}
433	433
434		-static struct file_operations jsf_fops = {
	434	+static const struct file_operations jsf_fops = {
435	435	.owner = THIS_MODULE,
436	436	.llseek = jsf_lseek,
437	437	.read = jsf_read,
...	...	@@ -704,7 +704,7 @@
704	704	return 0;
705	705	}
706	706
707		-static struct file_operations openprom_fops = {
	707	+static const struct file_operations openprom_fops = {
708	708	.owner = THIS_MODULE,
709	709	.llseek = no_llseek,
710	710	.ioctl = openprom_ioctl,
...	...	@@ -193,7 +193,7 @@
193	193	return 0;
194	194	}
195	195
196		-static struct file_operations riowd_fops = {
	196	+static const struct file_operations riowd_fops = {
197	197	.owner = THIS_MODULE,
198	198	.ioctl = riowd_ioctl,
199	199	.open = riowd_open,
...	...	@@ -233,7 +233,7 @@
233	233	return 0;
234	234	}
235	235
236		-static struct file_operations rtc_fops = {
	236	+static const struct file_operations rtc_fops = {
237	237	.owner = THIS_MODULE,
238	238	.llseek = no_llseek,
239	239	.ioctl = rtc_ioctl,
...	...	@@ -224,7 +224,7 @@
224	224	return IRQ_HANDLED;
225	225	}
226	226
227		-static struct file_operations uctrl_fops = {
	227	+static const struct file_operations uctrl_fops = {
228	228	.owner = THIS_MODULE,
229	229	.llseek = no_llseek,
230	230	.ioctl = uctrl_ioctl,