[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>

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 = {

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,

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");
 

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)

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;
 

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},

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);
 	

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? */

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);

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;

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;

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 */

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;

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;

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];

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;

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);

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;

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)

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);