[PATCH] mark f_ops const in the inode

Mark the f_ops members of inodes as const, as well as fix the
ripple-through this causes by places that copy this f_ops and then "do
stuff" with it.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

42 files changed, 75 insertions, 74 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index b3962c3a0348..5be40aa483fd 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -103,7 +103,7 @@ spufs_setattr(struct dentry *dentry, struct iattr *attr)
 
 static int
 spufs_new_file(struct super_block *sb, struct dentry *dentry,
-                struct file_operations *fops, int mode,
+                const struct file_operations *fops, int mode,
                 struct spu_context *ctx)
 {
         static struct inode_operations spufs_file_iops = {
diff --git a/arch/ppc/kernel/ppc_htab.c b/arch/ppc/kernel/ppc_htab.c
index 2f5c7650274f..9b84bffdefce 100644
--- a/arch/ppc/kernel/ppc_htab.c
+++ b/arch/ppc/kernel/ppc_htab.c
@@ -52,7 +52,7 @@ static int ppc_htab_open(struct inode *inode, struct file *file)
         return single_open(file, ppc_htab_show, NULL);
 }
 
-struct file_operations ppc_htab_operations = {
+const struct file_operations ppc_htab_operations = {
         .open           = ppc_htab_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
diff --git a/drivers/char/drm/drm_fops.c b/drivers/char/drm/drm_fops.c
index 641f7633878c..b7f7951c4587 100644
--- a/drivers/char/drm/drm_fops.c
+++ b/drivers/char/drm/drm_fops.c
@@ -175,7 +175,7 @@ int drm_stub_open(struct inode *inode, struct file *filp)
         drm_device_t *dev = NULL;
         int minor = iminor(inode);
         int err = -ENODEV;
-        struct file_operations *old_fops;
+        const struct file_operations *old_fops;
 
         DRM_DEBUG("\n");
 
diff --git a/drivers/char/drm/i810_dma.c b/drivers/char/drm/i810_dma.c
index ae0aa6d7e0bb..c658dde3633b 100644
--- a/drivers/char/drm/i810_dma.c
+++ b/drivers/char/drm/i810_dma.c
@@ -126,7 +126,7 @@ static int i810_map_buffer(drm_buf_t * buf, struct file *filp)
         drm_device_t *dev = priv->head->dev;
         drm_i810_buf_priv_t *buf_priv = buf->dev_private;
         drm_i810_private_t *dev_priv = dev->dev_private;
-        struct file_operations *old_fops;
+        const struct file_operations *old_fops;
         int retcode = 0;
 
         if (buf_priv->currently_mapped == I810_BUF_MAPPED)
diff --git a/drivers/char/drm/i830_dma.c b/drivers/char/drm/i830_dma.c
index 163f2cbfe60d..b0f815d8cea8 100644
--- a/drivers/char/drm/i830_dma.c
+++ b/drivers/char/drm/i830_dma.c
@@ -128,7 +128,7 @@ static int i830_map_buffer(drm_buf_t * buf, struct file *filp)
         drm_device_t *dev = priv->head->dev;
         drm_i830_buf_priv_t *buf_priv = buf->dev_private;
         drm_i830_private_t *dev_priv = dev->dev_private;
-        struct file_operations *old_fops;
+        const struct file_operations *old_fops;
         unsigned long virtual;
         int retcode = 0;
 
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 5245ba1649ed..66719f9d294c 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -899,7 +899,7 @@ static const struct {
         unsigned int            minor;
         char                    *name;
         umode_t                 mode;
-        struct file_operations  *fops;
+        const struct file_operations    *fops;
 } devlist[] = { /* list of minor devices */
         {1, "mem",     S_IRUSR | S_IWUSR | S_IRGRP, &mem_fops},
         {2, "kmem",    S_IRUSR | S_IWUSR | S_IRGRP, &kmem_fops},
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 3e4c0414a01a..96eb2a709e21 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -129,7 +129,7 @@ static int misc_open(struct inode * inode, struct file * file)
         int minor = iminor(inode);
         struct miscdevice *c;
         int err = -ENODEV;
-        struct file_operations *old_fops, *new_fops = NULL;
+        const struct file_operations *old_fops, *new_fops = NULL;
         
         down(&misc_sem);
         
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 4fe3da3c667a..f8af0945964e 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -923,7 +923,7 @@ void input_unregister_handler(struct input_handler *handler)
 static int input_open_file(struct inode *inode, struct file *file)
 {
         struct input_handler *handler = input_table[iminor(inode) >> 5];
-        struct file_operations *old_fops, *new_fops = NULL;
+        const struct file_operations *old_fops, *new_fops = NULL;
         int err;
 
         /* No load-on-demand here? */
diff --git a/drivers/isdn/capi/kcapi_proc.c b/drivers/isdn/capi/kcapi_proc.c
index 2cc8b27e4c3b..ca9dc00a45c4 100644
--- a/drivers/isdn/capi/kcapi_proc.c
+++ b/drivers/isdn/capi/kcapi_proc.c
@@ -233,7 +233,7 @@ static struct file_operations proc_applstats_ops = {
 };
 
 static void
-create_seq_entry(char *name, mode_t mode, struct file_operations *f)
+create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 {
         struct proc_dir_entry *entry;
         entry = create_proc_entry(name, mode, NULL);
diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c
index 54f8b95717b0..96fe0ecae250 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/drivers/media/dvb/dvb-core/dvbdev.c
@@ -86,7 +86,7 @@ static int dvb_device_open(struct inode *inode, struct file *file)
 
         if (dvbdev && dvbdev->fops) {
                 int err = 0;
-                struct file_operations *old_fops;
+                const struct file_operations *old_fops;
 
                 file->private_data = dvbdev;
                 old_fops = file->f_op;
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index 75e3d41382f2..5f87dd5f1d0b 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -97,7 +97,7 @@ static int video_open(struct inode *inode, struct file *file)
         unsigned int minor = iminor(inode);
         int err = 0;
         struct video_device *vfl;
-        struct file_operations *old_fops;
+        const struct file_operations *old_fops;
 
         if(minor>=VIDEO_NUM_DEVICES)
                 return -ENODEV;
diff --git a/drivers/message/i2o/i2o_proc.c b/drivers/message/i2o/i2o_proc.c
index 2a0c42b8cda5..3d2e76eea93e 100644
--- a/drivers/message/i2o/i2o_proc.c
+++ b/drivers/message/i2o/i2o_proc.c
@@ -56,7 +56,7 @@
 typedef struct _i2o_proc_entry_t {
         char *name;             /* entry name */
         mode_t mode;            /* mode */
-        struct file_operations *fops;   /* open function */
+        const struct file_operations *fops;     /* open function */
 } i2o_proc_entry;
 
 /* global I2O /proc/i2o entry */
diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
index d6bae699749a..b62da9b0cbf0 100644
--- a/drivers/oprofile/oprofilefs.c
+++ b/drivers/oprofile/oprofilefs.c
@@ -130,7 +130,7 @@ static struct file_operations ulong_ro_fops = {
 
 
 static struct dentry * __oprofilefs_create_file(struct super_block * sb,
-        struct dentry * root, char const * name, struct file_operations * fops,
+        struct dentry * root, char const * name, const struct file_operations * fops,
         int perm)
 {
         struct dentry * dentry;
@@ -203,7 +203,7 @@ int oprofilefs_create_ro_atomic(struct super_block * sb, struct dentry * root,
 
  
 int oprofilefs_create_file(struct super_block * sb, struct dentry * root,
-        char const * name, struct file_operations * fops)
+        char const * name, const struct file_operations * fops)
 {
         if (!__oprofilefs_create_file(sb, root, name, fops, 0644))
                 return -EFAULT;
@@ -212,7 +212,7 @@ int oprofilefs_create_file(struct super_block * sb, struct dentry * root,
 
 
 int oprofilefs_create_file_perm(struct super_block * sb, struct dentry * root,
-        char const * name, struct file_operations * fops, int perm)
+        char const * name, const struct file_operations * fops, int perm)
 {
         if (!__oprofilefs_create_file(sb, root, name, fops, perm))
                 return -EFAULT;
diff --git a/drivers/telephony/phonedev.c b/drivers/telephony/phonedev.c
index 7a6db1c5c8c5..e166fffea86b 100644
--- a/drivers/telephony/phonedev.c
+++ b/drivers/telephony/phonedev.c
@@ -49,7 +49,7 @@ static int phone_open(struct inode *inode, struct file *file)
         unsigned int minor = iminor(inode);
         int err = 0;
         struct phone_device *p;
-        struct file_operations *old_fops, *new_fops = NULL;
+        const struct file_operations *old_fops, *new_fops = NULL;
 
         if (minor >= PHONE_NUM_DEVICES)
                 return -ENODEV;
diff --git a/drivers/usb/core/file.c b/drivers/usb/core/file.c
index 37b13368c814..b263a54a13c0 100644
--- a/drivers/usb/core/file.c
+++ b/drivers/usb/core/file.c
@@ -24,15 +24,15 @@
 #include "usb.h"
 
 #define MAX_USB_MINORS  256
-static struct file_operations *usb_minors[MAX_USB_MINORS];
+static const struct file_operations *usb_minors[MAX_USB_MINORS];
 static DEFINE_SPINLOCK(minor_lock);
 
 static int usb_open(struct inode * inode, struct file * file)
 {
         int minor = iminor(inode);
-        struct file_operations *c;
+        const struct file_operations *c;
         int err = -ENODEV;
-        struct file_operations *old_fops, *new_fops = NULL;
+        const struct file_operations *old_fops, *new_fops = NULL;
 
         spin_lock (&minor_lock);
         c = usb_minors[minor];
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index b44cfda76b61..3f618ce6998d 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1581,7 +1581,7 @@ restart:
 
 static struct inode *
 gadgetfs_create_file (struct super_block *sb, char const *name,
-                void *data, struct file_operations *fops,
+                void *data, const struct file_operations *fops,
                 struct dentry **dentry_p);
 
 static int activate_ep_files (struct dev_data *dev)
@@ -1955,7 +1955,7 @@ module_param (default_perm, uint, 0644);
 
 static struct inode *
 gadgetfs_make_inode (struct super_block *sb,
-                void *data, struct file_operations *fops,
+                void *data, const struct file_operations *fops,
                 int mode)
 {
         struct inode *inode = new_inode (sb);
@@ -1979,7 +1979,7 @@ gadgetfs_make_inode (struct super_block *sb,
  */
 static struct inode *
 gadgetfs_create_file (struct super_block *sb, char const *name,
-                void *data, struct file_operations *fops,
+                void *data, const struct file_operations *fops,
                 struct dentry **dentry_p)
 {
         struct dentry   *dentry;
diff --git a/fs/char_dev.c b/fs/char_dev.c
index 8c6eb04d31e2..b53dffa46bac 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -250,7 +250,7 @@ int alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
 }
 
 int register_chrdev(unsigned int major, const char *name,
-                    struct file_operations *fops)
+                    const struct file_operations *fops)
 {
         struct char_device_struct *cd;
         struct cdev *cdev;
@@ -473,7 +473,7 @@ struct cdev *cdev_alloc(void)
         return p;
 }
 
-void cdev_init(struct cdev *cdev, struct file_operations *fops)
+void cdev_init(struct cdev *cdev, const struct file_operations *fops)
 {
         memset(cdev, 0, sizeof *cdev);
         INIT_LIST_HEAD(&cdev->list);
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index d4f1a2cddd47..85d166cdcae4 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -191,7 +191,7 @@ static int debugfs_create_by_name(const char *name, mode_t mode,
  */
 struct dentry *debugfs_create_file(const char *name, mode_t mode,
                                    struct dentry *parent, void *data,
-                                   struct file_operations *fops)
+                                   const struct file_operations *fops)
 {
         struct dentry *dentry = NULL;
         int error;
diff --git a/fs/inode.c b/fs/inode.c
index 1fddf2803af8..32b7c3375021 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -104,7 +104,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 {
         static struct address_space_operations empty_aops;
         static struct inode_operations empty_iops;
-        static struct file_operations empty_fops;
+        static const struct file_operations empty_fops;
         struct inode *inode;
 
         if (sb->s_op->alloc_inode)
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 5320e5afaddb..31018333dc38 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -706,7 +706,7 @@ nfsd_close(struct file *filp)
  * after it.
  */
 static inline int nfsd_dosync(struct file *filp, struct dentry *dp,
-                              struct file_operations *fop)
+                              const struct file_operations *fop)
 {
         struct inode *inode = dp->d_inode;
         int (*fsync) (struct file *, struct dentry *, int);
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 47b7a20d45eb..4ba03009cf72 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -560,7 +560,7 @@ static void proc_kill_inodes(struct proc_dir_entry *de)
                 struct file * filp = list_entry(p, struct file, f_u.fu_list);
                 struct dentry * dentry = filp->f_dentry;
                 struct inode * inode;
-                struct file_operations *fops;
+                const struct file_operations *fops;
 
                 if (dentry->d_op != &proc_dentry_operations)
                         continue;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 95a1cf32b838..0502f17b860d 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -30,7 +30,7 @@ do {						\
 
 #endif
 
-extern void create_seq_entry(char *name, mode_t mode, struct file_operations *f);
+extern void create_seq_entry(char *name, mode_t mode, const struct file_operations *f);
 extern int proc_exe_link(struct inode *, struct dentry **, struct vfsmount **);
 extern int proc_tid_stat(struct task_struct *,  char *);
 extern int proc_tgid_stat(struct task_struct *, char *);
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 1edce0c34bfd..ef5a3323f4b5 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -731,7 +731,7 @@ static struct file_operations proc_sysrq_trigger_operations = {
 
 struct proc_dir_entry *proc_root_kcore;
 
-void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
+void create_seq_entry(char *name, mode_t mode, const struct file_operations *f)
 {
         struct proc_dir_entry *entry;
         entry = create_proc_entry(name, mode, NULL);
diff --git a/fs/select.c b/fs/select.c
index 05cd199a1127..b3a3a1326af6 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -220,7 +220,7 @@ int do_select(int n, fd_set_bits *fds, s64 *timeout)
                 for (i = 0; i < n; ++rinp, ++routp, ++rexp) {
                         unsigned long in, out, ex, all_bits, bit = 1, mask, j;
                         unsigned long res_in = 0, res_out = 0, res_ex = 0;
-                        struct file_operations *f_op = NULL;
+                        const struct file_operations *f_op = NULL;
                         struct file *file = NULL;
 
                         in = *inp++; out = *outp++; ex = *exp++;
diff --git a/include/linux/cdev.h b/include/linux/cdev.h
index 8da37e29cb87..2216638962d2 100644
--- a/include/linux/cdev.h
+++ b/include/linux/cdev.h
@@ -5,13 +5,13 @@
 struct cdev {
         struct kobject kobj;
         struct module *owner;
-        struct file_operations *ops;
+        const struct file_operations *ops;
         struct list_head list;
         dev_t dev;
         unsigned int count;
 };
 
-void cdev_init(struct cdev *, struct file_operations *);
+void cdev_init(struct cdev *, const struct file_operations *);
 
 struct cdev *cdev_alloc(void);
 
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 4b0428e335be..176e2d371577 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -29,7 +29,7 @@ struct debugfs_blob_wrapper {
 #if defined(CONFIG_DEBUG_FS)
 struct dentry *debugfs_create_file(const char *name, mode_t mode,
                                    struct dentry *parent, void *data,
-                                   struct file_operations *fops);
+                                   const struct file_operations *fops);
 
 struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 680d913350e7..ef355bc73714 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -496,7 +496,7 @@ struct inode {
         struct mutex            i_mutex;
         struct rw_semaphore     i_alloc_sem;
         struct inode_operations *i_op;
-        struct file_operations  *i_fop; /* former ->i_op->default_file_ops */
+        const struct file_operations    *i_fop; /* former ->i_op->default_file_ops */
         struct super_block      *i_sb;
         struct file_lock        *i_flock;
         struct address_space    *i_mapping;
@@ -636,7 +636,7 @@ struct file {
         } f_u;
         struct dentry           *f_dentry;
         struct vfsmount         *f_vfsmnt;
-        struct file_operations  *f_op;
+        const struct file_operations    *f_op;
         atomic_t                f_count;
         unsigned int            f_flags;
         mode_t                  f_mode;
@@ -1414,7 +1414,7 @@ extern void bd_release_from_disk(struct block_device *, struct gendisk *);
 extern int alloc_chrdev_region(dev_t *, unsigned, unsigned, const char *);
 extern int register_chrdev_region(dev_t, unsigned, const char *);
 extern int register_chrdev(unsigned int, const char *,
-                           struct file_operations *);
+                           const struct file_operations *);
 extern int unregister_chrdev(unsigned int, const char *);
 extern void unregister_chrdev_region(dev_t, unsigned);
 extern int chrdev_open(struct inode *, struct file *);
diff --git a/include/linux/input.h b/include/linux/input.h
index 6d4cc3c110d6..1d4e341b72e6 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -957,7 +957,7 @@ struct input_handler {
         struct input_handle* (*connect)(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id);
         void (*disconnect)(struct input_handle *handle);
 
-        struct file_operations *fops;
+        const struct file_operations *fops;
         int minor;
         char *name;
 
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 14ceebfc1efa..5b584dafb5a6 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -36,7 +36,7 @@ struct class_device;
 struct miscdevice  {
         int minor;
         const char *name;
-        struct file_operations *fops;
+        const struct file_operations *fops;
         struct list_head list;
         struct device *dev;
         struct class_device *class;
diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h
index b5b3197dfd4f..0d514b252454 100644
--- a/include/linux/oprofile.h
+++ b/include/linux/oprofile.h
@@ -84,10 +84,10 @@ void oprofile_add_trace(unsigned long eip);
  * the specified file operations.
  */
 int oprofilefs_create_file(struct super_block * sb, struct dentry * root,
-        char const * name, struct file_operations * fops);
+        char const * name, const struct file_operations * fops);
 
 int oprofilefs_create_file_perm(struct super_block * sb, struct dentry * root,
-        char const * name, struct file_operations * fops, int perm);
+        char const * name, const struct file_operations * fops, int perm);
  
 /** Create a file for read/write access to an unsigned long. */
 int oprofilefs_create_ulong(struct super_block * sb, struct dentry * root,
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index cb224cf653b1..6d03d025fcd5 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -58,7 +58,7 @@ struct proc_dir_entry {
         gid_t gid;
         loff_t size;
         struct inode_operations * proc_iops;
-        struct file_operations * proc_fops;
+        const struct file_operations * proc_fops;
         get_info_t *get_info;
         struct module *owner;
         struct proc_dir_entry *next, *parent, *subdir;
@@ -189,7 +189,7 @@ static inline struct proc_dir_entry *proc_net_create(const char *name,
 }
 
 static inline struct proc_dir_entry *proc_net_fops_create(const char *name,
-        mode_t mode, struct file_operations *fops)
+        mode_t mode, const struct file_operations *fops)
 {
         struct proc_dir_entry *res = create_proc_entry(name, mode, proc_net);
         if (res)
diff --git a/include/linux/sound.h b/include/linux/sound.h
index 72b9af4c3fd4..f63d8342ffa3 100644
--- a/include/linux/sound.h
+++ b/include/linux/sound.h
@@ -30,12 +30,12 @@
  */
  
 struct device;
-extern int register_sound_special(struct file_operations *fops, int unit);
-extern int register_sound_special_device(struct file_operations *fops, int unit, struct device *dev);
-extern int register_sound_mixer(struct file_operations *fops, int dev);
-extern int register_sound_midi(struct file_operations *fops, int dev);
-extern int register_sound_dsp(struct file_operations *fops, int dev);
-extern int register_sound_synth(struct file_operations *fops, int dev);
+extern int register_sound_special(const struct file_operations *fops, int unit);
+extern int register_sound_special_device(const struct file_operations *fops, int unit, struct device *dev);
+extern int register_sound_mixer(const struct file_operations *fops, int dev);
+extern int register_sound_midi(const struct file_operations *fops, int dev);
+extern int register_sound_dsp(const struct file_operations *fops, int dev);
+extern int register_sound_synth(const struct file_operations *fops, int dev);
 
 extern void unregister_sound_special(int unit);
 extern void unregister_sound_mixer(int unit);
diff --git a/include/linux/sunrpc/stats.h b/include/linux/sunrpc/stats.h
index 0d6ed3c8bdc4..d93c24b47f3f 100644
--- a/include/linux/sunrpc/stats.h
+++ b/include/linux/sunrpc/stats.h
@@ -50,7 +50,7 @@ struct proc_dir_entry *	rpc_proc_register(struct rpc_stat *);
 void                    rpc_proc_unregister(const char *);
 void                    rpc_proc_zero(struct rpc_program *);
 struct proc_dir_entry * svc_proc_register(struct svc_stat *,
-                                          struct file_operations *);
+                                          const struct file_operations *);
 void                    svc_proc_unregister(const char *);
 
 void                    svc_seq_show(struct seq_file *,
@@ -65,7 +65,7 @@ static inline void rpc_proc_unregister(const char *p) {}
 static inline void rpc_proc_zero(struct rpc_program *p) {}
 
 static inline struct proc_dir_entry *svc_proc_register(struct svc_stat *s,
-                                                       struct file_operations *f) { return NULL; }
+                                                       const struct file_operations *f) { return NULL; }
 static inline void svc_proc_unregister(const char *p) {}
 
 static inline void svc_seq_show(struct seq_file *seq,
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 130d125fda12..e34e5e3dce52 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -615,7 +615,7 @@ extern struct bus_type usb_bus_type;
  */
 struct usb_class_driver {
         char *name;
-        struct file_operations *fops;
+        const struct file_operations *fops;
         int minor_base;
 };
 
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 2275bfec5b68..af2d6155d3fe 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -75,7 +75,7 @@ struct video_device
         int minor;
 
         /* device ops + callbacks */
-        struct file_operations *fops;
+        const struct file_operations *fops;
         void (*release)(struct video_device *vfd);
 
 
diff --git a/include/sound/core.h b/include/sound/core.h
index 144bdc2f217f..7f32c12b4a0a 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -186,7 +186,7 @@ struct snd_minor {
         int type;                       /* SNDRV_DEVICE_TYPE_XXX */
         int card;                       /* card number */
         int device;                     /* device number */
-        struct file_operations *f_ops;  /* file operations */
+        const struct file_operations *f_ops;    /* file operations */
         void *private_data;             /* private data for f_ops->open */
         char name[0];                   /* device name (keep at the end of
                                                                 structure) */
@@ -200,14 +200,14 @@ extern int snd_ecards_limit;
 void snd_request_card(int card);
 
 int snd_register_device(int type, struct snd_card *card, int dev,
-                        struct file_operations *f_ops, void *private_data,
+                        const struct file_operations *f_ops, void *private_data,
                         const char *name);
 int snd_unregister_device(int type, struct snd_card *card, int dev);
 void *snd_lookup_minor_data(unsigned int minor, int type);
 
 #ifdef CONFIG_SND_OSSEMUL
 int snd_register_oss_device(int type, struct snd_card *card, int dev,
-                            struct file_operations *f_ops, void *private_data,
+                            const struct file_operations *f_ops, void *private_data,
                             const char *name);
 int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
 void *snd_lookup_oss_minor_data(unsigned int minor, int type);
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index aa4158be9900..cc673dd8433f 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -395,7 +395,7 @@ enum {
  */
 struct rpc_filelist {
         char *name;
-        struct file_operations *i_fop;
+        const struct file_operations *i_fop;
         int mode;
 };
 
diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c
index 790941e8af4d..dea529666d69 100644
--- a/net/sunrpc/stats.c
+++ b/net/sunrpc/stats.c
@@ -225,7 +225,7 @@ EXPORT_SYMBOL(rpc_print_iostats);
  * Register/unregister RPC proc files
  */
 static inline struct proc_dir_entry *
-do_register(const char *name, void *data, struct file_operations *fops)
+do_register(const char *name, void *data, const struct file_operations *fops)
 {
         struct proc_dir_entry *ent;
 
@@ -253,7 +253,7 @@ rpc_proc_unregister(const char *name)
 }
 
 struct proc_dir_entry *
-svc_proc_register(struct svc_stat *statp, struct file_operations *fops)
+svc_proc_register(struct svc_stat *statp, const struct file_operations *fops)
 {
         return do_register(statp->program->pg_name, statp, fops);
 }
diff --git a/sound/core/init.c b/sound/core/init.c
index ad68761abba1..5bb8a8b23d51 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -223,7 +223,8 @@ int snd_card_disconnect(struct snd_card *card)
         struct snd_monitor_file *mfile;
         struct file *file;
         struct snd_shutdown_f_ops *s_f_ops;
-        struct file_operations *f_ops, *old_f_ops;
+        struct file_operations *f_ops;
+        const struct file_operations *old_f_ops;
         int err;
 
         spin_lock(&card->files_lock);
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 4d28e5212611..108e430b5036 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -137,7 +137,7 @@ static int snd_open(struct inode *inode, struct file *file)
 {
         unsigned int minor = iminor(inode);
         struct snd_minor *mptr = NULL;
-        struct file_operations *old_fops;
+        const struct file_operations *old_fops;
         int err = 0;
 
         if (minor >= ARRAY_SIZE(snd_minors))
@@ -240,7 +240,7 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
  * Retrurns zero if successful, or a negative error code on failure.
  */
 int snd_register_device(int type, struct snd_card *card, int dev,
-                        struct file_operations *f_ops, void *private_data,
+                        const struct file_operations *f_ops, void *private_data,
                         const char *name)
 {
         int minor;
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c
index 4023d3b406de..9055c6de9587 100644
--- a/sound/core/sound_oss.c
+++ b/sound/core/sound_oss.c
@@ -95,7 +95,7 @@ static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
 }
 
 int snd_register_oss_device(int type, struct snd_card *card, int dev,
-                            struct file_operations *f_ops, void *private_data,
+                            const struct file_operations *f_ops, void *private_data,
                             const char *name)
 {
         int minor = snd_oss_kernel_minor(type, card, dev);
diff --git a/sound/sound_core.c b/sound/sound_core.c
index 394b53e20cb8..6f849720aef3 100644
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -53,7 +53,7 @@
 struct sound_unit
 {
         int unit_minor;
-        struct file_operations *unit_fops;
+        const struct file_operations *unit_fops;
         struct sound_unit *next;
         char name[32];
 };
@@ -73,7 +73,7 @@ EXPORT_SYMBOL(sound_class);
  *      join into it. Called with the lock asserted
  */
 
-static int __sound_insert_unit(struct sound_unit * s, struct sound_unit **list, struct file_operations *fops, int index, int low, int top)
+static int __sound_insert_unit(struct sound_unit * s, struct sound_unit **list, const struct file_operations *fops, int index, int low, int top)
 {
         int n=low;
 
@@ -153,7 +153,7 @@ static DEFINE_SPINLOCK(sound_loader_lock);
  *      list. Acquires locks as needed
  */
 
-static int sound_insert_unit(struct sound_unit **list, struct file_operations *fops, int index, int low, int top, const char *name, umode_t mode, struct device *dev)
+static int sound_insert_unit(struct sound_unit **list, const struct file_operations *fops, int index, int low, int top, const char *name, umode_t mode, struct device *dev)
 {
         struct sound_unit *s = kmalloc(sizeof(*s), GFP_KERNEL);
         int r;
@@ -237,7 +237,7 @@ static struct sound_unit *chains[SOUND_STEP];
  *      a negative error code is returned.
  */
  
-int register_sound_special_device(struct file_operations *fops, int unit,
+int register_sound_special_device(const struct file_operations *fops, int unit,
                                   struct device *dev)
 {
         const int chain = unit % SOUND_STEP;
@@ -301,7 +301,7 @@ int register_sound_special_device(struct file_operations *fops, int unit,
  
 EXPORT_SYMBOL(register_sound_special_device);
 
-int register_sound_special(struct file_operations *fops, int unit)
+int register_sound_special(const struct file_operations *fops, int unit)
 {
         return register_sound_special_device(fops, unit, NULL);
 }
@@ -318,7 +318,7 @@ EXPORT_SYMBOL(register_sound_special);
  *      number is returned, on failure a negative error code is returned.
  */
 
-int register_sound_mixer(struct file_operations *fops, int dev)
+int register_sound_mixer(const struct file_operations *fops, int dev)
 {
         return sound_insert_unit(&chains[0], fops, dev, 0, 128,
                                  "mixer", S_IRUSR | S_IWUSR, NULL);
@@ -336,7 +336,7 @@ EXPORT_SYMBOL(register_sound_mixer);
  *      number is returned, on failure a negative error code is returned.
  */
 
-int register_sound_midi(struct file_operations *fops, int dev)
+int register_sound_midi(const struct file_operations *fops, int dev)
 {
         return sound_insert_unit(&chains[2], fops, dev, 2, 130,
                                  "midi", S_IRUSR | S_IWUSR, NULL);
@@ -362,7 +362,7 @@ EXPORT_SYMBOL(register_sound_midi);
  *      and will always allocate them as a matching pair - eg dsp3/audio3
  */
 
-int register_sound_dsp(struct file_operations *fops, int dev)
+int register_sound_dsp(const struct file_operations *fops, int dev)
 {
         return sound_insert_unit(&chains[3], fops, dev, 3, 131,
                                  "dsp", S_IWUSR | S_IRUSR, NULL);
@@ -381,7 +381,7 @@ EXPORT_SYMBOL(register_sound_dsp);
  */
 
 
-int register_sound_synth(struct file_operations *fops, int dev)
+int register_sound_synth(const struct file_operations *fops, int dev)
 {
         return sound_insert_unit(&chains[9], fops, dev, 9, 137,
                                  "synth", S_IRUSR | S_IWUSR, NULL);
@@ -501,7 +501,7 @@ int soundcore_open(struct inode *inode, struct file *file)
         int chain;
         int unit = iminor(inode);
         struct sound_unit *s;
-        struct file_operations *new_fops = NULL;
+        const struct file_operations *new_fops = NULL;
 
         chain=unit&0x0F;
         if(chain==4 || chain==5)        /* dsp/audio/dsp16 */
@@ -540,7 +540,7 @@ int soundcore_open(struct inode *inode, struct file *file)
                  * switching ->f_op in the first place.
                  */
                 int err = 0;
-                struct file_operations *old_fops = file->f_op;
+                const struct file_operations *old_fops = file->f_op;
                 file->f_op = new_fops;
                 spin_unlock(&sound_loader_lock);
                 if(file->f_op->open)