.drop_inode     = generic_delete_inode,
 };
 
-static struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
+static const struct file_operations *ibmasmfs_dir_ops = &simple_dir_operations;
 
 static struct file_system_type ibmasmfs_type = {
        .owner          = THIS_MODULE,
 
 
 extern struct file_system_type v9fs_fs_type;
 extern struct address_space_operations v9fs_addr_operations;
-extern struct file_operations v9fs_file_operations;
-extern struct file_operations v9fs_dir_operations;
+extern const struct file_operations v9fs_file_operations;
+extern const struct file_operations v9fs_dir_operations;
 extern struct dentry_operations v9fs_dentry_operations;
 
 struct inode *v9fs_get_inode(struct super_block *sb, int mode);
 
        return 0;
 }
 
-struct file_operations v9fs_dir_operations = {
+const struct file_operations v9fs_dir_operations = {
        .read = generic_read_dir,
        .readdir = v9fs_dir_readdir,
        .open = v9fs_file_open,
 
        return total;
 }
 
-struct file_operations v9fs_file_operations = {
+const struct file_operations v9fs_file_operations = {
        .llseek = generic_file_llseek,
        .read = v9fs_file_read,
        .write = v9fs_file_write,
 
 
 /* dir_*.c */
 extern struct inode_operations adfs_dir_inode_operations;
-extern struct file_operations adfs_dir_operations;
+extern const struct file_operations adfs_dir_operations;
 extern struct dentry_operations adfs_dentry_operations;
 extern struct adfs_dir_ops adfs_f_dir_ops;
 extern struct adfs_dir_ops adfs_fplus_dir_ops;
 
 /* file.c */
 extern struct inode_operations adfs_file_inode_operations;
-extern struct file_operations adfs_file_operations;
+extern const struct file_operations adfs_file_operations;
 
 static inline __u32 signed_asl(__u32 val, signed int shift)
 {
 
        return ret;
 }
 
-struct file_operations adfs_dir_operations = {
+const struct file_operations adfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = adfs_readdir,
        .fsync          = file_fsync,
 
 
 #include "adfs.h"
 
-struct file_operations adfs_file_operations = {
+const struct file_operations adfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .mmap           = generic_file_mmap,
 
 extern struct inode_operations  affs_file_inode_operations;
 extern struct inode_operations  affs_dir_inode_operations;
 extern struct inode_operations   affs_symlink_inode_operations;
-extern struct file_operations   affs_file_operations;
-extern struct file_operations   affs_file_operations_ofs;
-extern struct file_operations   affs_dir_operations;
+extern const struct file_operations     affs_file_operations;
+extern const struct file_operations     affs_file_operations_ofs;
+extern const struct file_operations     affs_dir_operations;
 extern struct address_space_operations  affs_symlink_aops;
 extern struct address_space_operations  affs_aops;
 extern struct address_space_operations  affs_aops_ofs;
 
 
 static int affs_readdir(struct file *, void *, filldir_t);
 
-struct file_operations affs_dir_operations = {
+const struct file_operations affs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = affs_readdir,
        .fsync          = file_fsync,
 
 static int affs_file_open(struct inode *inode, struct file *filp);
 static int affs_file_release(struct inode *inode, struct file *filp);
 
-struct file_operations affs_file_operations = {
+const struct file_operations affs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
 static int afs_dir_lookup_filldir(void *_cookie, const char *name, int nlen,
                                  loff_t fpos, ino_t ino, unsigned dtype);
 
-struct file_operations afs_dir_file_operations = {
+const struct file_operations afs_dir_file_operations = {
        .open           = afs_dir_open,
        .readdir        = afs_dir_readdir,
 };
 
  * dir.c
  */
 extern struct inode_operations afs_dir_inode_operations;
-extern struct file_operations afs_dir_file_operations;
+extern const struct file_operations afs_dir_file_operations;
 
 /*
  * file.c
  * mntpt.c
  */
 extern struct inode_operations afs_mntpt_inode_operations;
-extern struct file_operations afs_mntpt_file_operations;
+extern const struct file_operations afs_mntpt_file_operations;
 extern struct afs_timer afs_mntpt_expiry_timer;
 extern struct afs_timer_ops afs_mntpt_expiry_timer_ops;
 extern unsigned long afs_mntpt_expiry_timeout;
 
 static int afs_mntpt_open(struct inode *inode, struct file *file);
 static void *afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd);
 
-struct file_operations afs_mntpt_file_operations = {
+const struct file_operations afs_mntpt_file_operations = {
        .open           = afs_mntpt_open,
 };
 
 
        .show   = afs_proc_cells_show,
 };
 
-static struct file_operations afs_proc_cells_fops = {
+static const struct file_operations afs_proc_cells_fops = {
        .open           = afs_proc_cells_open,
        .read           = seq_read,
        .write          = afs_proc_cells_write,
                                       const char __user *buf,
                                       size_t size, loff_t *_pos);
 
-static struct file_operations afs_proc_rootcell_fops = {
+static const struct file_operations afs_proc_rootcell_fops = {
        .open           = afs_proc_rootcell_open,
        .read           = afs_proc_rootcell_read,
        .write          = afs_proc_rootcell_write,
        .show   = afs_proc_cell_volumes_show,
 };
 
-static struct file_operations afs_proc_cell_volumes_fops = {
+static const struct file_operations afs_proc_cell_volumes_fops = {
        .open           = afs_proc_cell_volumes_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .show   = afs_proc_cell_vlservers_show,
 };
 
-static struct file_operations afs_proc_cell_vlservers_fops = {
+static const struct file_operations afs_proc_cell_vlservers_fops = {
        .open           = afs_proc_cell_vlservers_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
        .show   = afs_proc_cell_servers_show,
 };
 
-static struct file_operations afs_proc_cell_servers_fops = {
+static const struct file_operations afs_proc_cell_servers_fops = {
        .open           = afs_proc_cell_servers_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
 
 
 extern struct inode_operations autofs_root_inode_operations;
 extern struct inode_operations autofs_symlink_inode_operations;
-extern struct file_operations autofs_root_operations;
+extern const struct file_operations autofs_root_operations;
 
 /* Initializing function */
 
 
 static int autofs_root_mkdir(struct inode *,struct dentry *,int);
 static int autofs_root_ioctl(struct inode *, struct file *,unsigned int,unsigned long);
 
-struct file_operations autofs_root_operations = {
+const struct file_operations autofs_root_operations = {
        .read           = generic_read_dir,
        .readdir        = autofs_root_readdir,
        .ioctl          = autofs_root_ioctl,
 
 extern struct inode_operations autofs4_root_inode_operations;
 extern struct inode_operations autofs4_indirect_root_inode_operations;
 extern struct inode_operations autofs4_direct_root_inode_operations;
-extern struct file_operations autofs4_dir_operations;
-extern struct file_operations autofs4_root_operations;
+extern const struct file_operations autofs4_dir_operations;
+extern const struct file_operations autofs4_root_operations;
 
 /* Initializing function */
 
 
 static struct dentry *autofs4_lookup(struct inode *,struct dentry *, struct nameidata *);
 static void *autofs4_follow_link(struct dentry *, struct nameidata *);
 
-struct file_operations autofs4_root_operations = {
+const struct file_operations autofs4_root_operations = {
        .open           = dcache_dir_open,
        .release        = dcache_dir_close,
        .read           = generic_read_dir,
        .ioctl          = autofs4_root_ioctl,
 };
 
-struct file_operations autofs4_dir_operations = {
+const struct file_operations autofs4_dir_operations = {
        .open           = autofs4_dir_open,
        .release        = autofs4_dir_close,
        .read           = generic_read_dir,
 
 
 #define EIO_ERROR ((void *) (return_EIO))
 
-static struct file_operations bad_file_ops =
+static const struct file_operations bad_file_ops =
 {
        .llseek         = EIO_ERROR,
        .aio_read       = EIO_ERROR,
 
 /* slab cache for befs_inode_info objects */
 static kmem_cache_t *befs_inode_cachep;
 
-static struct file_operations befs_dir_operations = {
+static const struct file_operations befs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = befs_readdir,
 };
 
 
 /* file.c */
 extern struct inode_operations bfs_file_inops;
-extern struct file_operations bfs_file_operations;
+extern const struct file_operations bfs_file_operations;
 extern struct address_space_operations bfs_aops;
 
 /* dir.c */
 extern struct inode_operations bfs_dir_inops;
-extern struct file_operations bfs_dir_operations;
+extern const struct file_operations bfs_dir_operations;
 
 #endif /* _FS_BFS_BFS_H */
 
        return 0;       
 }
 
-struct file_operations bfs_dir_operations = {
+const struct file_operations bfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = bfs_readdir,
        .fsync          = file_fsync,
 
 #define dprintf(x...)
 #endif
 
-struct file_operations bfs_file_operations = {
+const struct file_operations bfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
        return count;
 }
 
-static struct file_operations bm_entry_operations = {
+static const struct file_operations bm_entry_operations = {
        .read           = bm_entry_read,
        .write          = bm_entry_write,
 };
        return count;
 }
 
-static struct file_operations bm_register_operations = {
+static const struct file_operations bm_register_operations = {
        .write          = bm_register_write,
 };
 
        return count;
 }
 
-static struct file_operations bm_status_operations = {
+static const struct file_operations bm_status_operations = {
        .read           = bm_status_read,
        .write          = bm_status_write,
 };
 
        .direct_IO      = blkdev_direct_IO,
 };
 
-struct file_operations def_blk_fops = {
+const struct file_operations def_blk_fops = {
        .open           = blkdev_open,
        .release        = blkdev_close,
        .llseek         = block_llseek,
 
  * is contain the open that then fills in the correct operations
  * depending on the special file...
  */
-struct file_operations def_chr_fops = {
+const struct file_operations def_chr_fops = {
        .open = chrdev_open,
 };
 
 
 #endif 
 };
 
-struct file_operations cifs_file_ops = {
+const struct file_operations cifs_file_ops = {
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_file_direct_ops = {
+const struct file_operations cifs_file_direct_ops = {
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
        .dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
-struct file_operations cifs_file_nobrl_ops = {
+const struct file_operations cifs_file_nobrl_ops = {
        .read = do_sync_read,
        .write = do_sync_write,
        .readv = generic_file_readv,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_file_direct_nobrl_ops = {
+const struct file_operations cifs_file_direct_nobrl_ops = {
        /* no mmap, no aio, no readv - 
           BB reevaluate whether they can be done with directio, no cache */
        .read = cifs_user_read,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
-struct file_operations cifs_dir_ops = {
+const struct file_operations cifs_dir_ops = {
        .readdir = cifs_readdir,
        .release = cifs_closedir,
        .read    = generic_read_dir,
 
 extern struct inode_operations cifs_symlink_inode_ops;
 
 /* Functions related to files and directories */
-extern struct file_operations cifs_file_ops;
-extern struct file_operations cifs_file_direct_ops; /* if directio mount */
-extern struct file_operations cifs_file_nobrl_ops;
-extern struct file_operations cifs_file_direct_nobrl_ops; /* if directio mount */
+extern const struct file_operations cifs_file_ops;
+extern const struct file_operations cifs_file_direct_ops; /* if directio mount */
+extern const struct file_operations cifs_file_nobrl_ops;
+extern const struct file_operations cifs_file_direct_nobrl_ops; /* if directio mount */
 extern int cifs_open(struct inode *inode, struct file *file);
 extern int cifs_close(struct inode *inode, struct file *file);
 extern int cifs_closedir(struct inode *inode, struct file *file);
 extern int cifs_fsync(struct file *, struct dentry *, int);
 extern int cifs_flush(struct file *);
 extern int cifs_file_mmap(struct file * , struct vm_area_struct *);
-extern struct file_operations cifs_dir_ops;
+extern const struct file_operations cifs_dir_ops;
 extern int cifs_dir_open(struct inode *inode, struct file *file);
 extern int cifs_readdir(struct file *file, void *direntry, filldir_t filldir);
 extern int cifs_dir_notify(struct file *, unsigned long arg);
 
        .setattr        = coda_setattr,
 };
 
-struct file_operations coda_dir_operations = {
+const struct file_operations coda_dir_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_read_dir,
        .readdir        = coda_readdir,
 
        return err;
 }
 
-struct file_operations coda_file_operations = {
+const struct file_operations coda_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = coda_file_read,
        .write          = coda_file_write,
 
        .setattr        = coda_setattr,
 };
 
-struct file_operations coda_ioctl_operations = {
+const struct file_operations coda_ioctl_operations = {
        .owner          = THIS_MODULE,
        .ioctl          = coda_pioctl,
 };
 
 }
 
 
-static struct file_operations coda_psdev_fops = {
+static const struct file_operations coda_psdev_fops = {
        .owner          = THIS_MODULE,
        .read           = coda_psdev_read,
        .write          = coda_psdev_write,
 
 
 extern struct rw_semaphore configfs_rename_sem;
 extern struct super_block * configfs_sb;
-extern struct file_operations configfs_dir_operations;
-extern struct file_operations configfs_file_operations;
-extern struct file_operations bin_fops;
+extern const struct file_operations configfs_dir_operations;
+extern const struct file_operations configfs_file_operations;
+extern const struct file_operations bin_fops;
 extern struct inode_operations configfs_dir_inode_operations;
 extern struct inode_operations configfs_symlink_inode_operations;
 
 
        return offset;
 }
 
-struct file_operations configfs_dir_operations = {
+const struct file_operations configfs_dir_operations = {
        .open           = configfs_dir_open,
        .release        = configfs_dir_close,
        .llseek         = configfs_dir_lseek,
 
        return 0;
 }
 
-struct file_operations configfs_file_operations = {
+const struct file_operations configfs_file_operations = {
        .read           = configfs_read_file,
        .write          = configfs_write_file,
        .llseek         = generic_file_llseek,
 
 
 static struct super_operations cramfs_ops;
 static struct inode_operations cramfs_dir_inode_operations;
-static struct file_operations cramfs_directory_operations;
+static const struct file_operations cramfs_directory_operations;
 static struct address_space_operations cramfs_aops;
 
 static DEFINE_MUTEX(read_mutex);
 /*
  * A directory can only readdir
  */
-static struct file_operations cramfs_directory_operations = {
+static const struct file_operations cramfs_directory_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_read_dir,
        .readdir        = cramfs_readdir,
 
        return 0;
 }
 
-struct file_operations debugfs_file_operations = {
+const struct file_operations debugfs_file_operations = {
        .read =         default_read_file,
        .write =        default_write_file,
        .open =         default_open,
        return count;
 }
 
-static struct file_operations fops_bool = {
+static const struct file_operations fops_bool = {
        .read =         read_file_bool,
        .write =        write_file_bool,
        .open =         default_open,
 
 #ifdef CONFIG_DEVFS_DEBUG
 static ssize_t stat_read(struct file *file, char __user *buf, size_t len,
                         loff_t * ppos);
-static struct file_operations stat_fops = {
+static const struct file_operations stat_fops = {
        .open = nonseekable_open,
        .read = stat_read,
 };
 #endif
 
 /*  Devfs daemon file operations  */
-static struct file_operations devfsd_fops = {
+static const struct file_operations devfsd_fops = {
        .open = nonseekable_open,
        .read = devfsd_read,
        .ioctl = devfsd_ioctl,
 
 static struct inode_operations devfs_iops;
 static struct inode_operations devfs_dir_iops;
-static struct file_operations devfs_fops;
-static struct file_operations devfs_dir_fops;
+static const struct file_operations devfs_fops;
+static const struct file_operations devfs_dir_fops;
 static struct inode_operations devfs_symlink_iops;
 
 static int devfs_notify_change(struct dentry *dentry, struct iattr *iattr)
        return err;
 }                              /*  End Function devfs_open  */
 
-static struct file_operations devfs_fops = {
+static const struct file_operations devfs_fops = {
        .open = devfs_open,
 };
 
-static struct file_operations devfs_dir_fops = {
+static const struct file_operations devfs_dir_fops = {
        .read = generic_read_dir,
        .readdir = devfs_readdir,
 };
 
 
 static int efs_readdir(struct file *, void *, filldir_t);
 
-struct file_operations efs_dir_operations = {
+const struct file_operations efs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = efs_readdir,
 };
 
 static struct vfsmount *eventpoll_mnt __read_mostly;
 
 /* File callbacks that implement the eventpoll file behaviour */
-static struct file_operations eventpoll_fops = {
+static const struct file_operations eventpoll_fops = {
        .release        = ep_eventpoll_close,
        .poll           = ep_eventpoll_poll
 };
 
        return 0;
 }
 
-struct file_operations ext2_dir_operations = {
+const struct file_operations ext2_dir_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_read_dir,
        .readdir        = ext2_readdir,
 
  */
 
 /* dir.c */
-extern struct file_operations ext2_dir_operations;
+extern const struct file_operations ext2_dir_operations;
 
 /* file.c */
 extern struct inode_operations ext2_file_inode_operations;
-extern struct file_operations ext2_file_operations;
-extern struct file_operations ext2_xip_file_operations;
+extern const struct file_operations ext2_file_operations;
+extern const struct file_operations ext2_xip_file_operations;
 
 /* inode.c */
 extern struct address_space_operations ext2_aops;
 
  * We have mostly NULL's here: the current defaults are ok for
  * the ext2 filesystem.
  */
-struct file_operations ext2_file_operations = {
+const struct file_operations ext2_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 };
 
 #ifdef CONFIG_EXT2_FS_XIP
-struct file_operations ext2_xip_file_operations = {
+const struct file_operations ext2_xip_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = xip_file_read,
        .write          = xip_file_write,
 
 static int ext3_release_dir (struct inode * inode,
                                struct file * filp);
 
-struct file_operations ext3_dir_operations = {
+const struct file_operations ext3_dir_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_read_dir,
        .readdir        = ext3_readdir,         /* we take BKL. needed?*/
 
        return ret;
 }
 
-struct file_operations ext3_file_operations = {
+const struct file_operations ext3_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
 
        return ret;
 }
 
-struct file_operations fat_dir_operations = {
+const struct file_operations fat_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = fat_readdir,
        .ioctl          = fat_dir_ioctl,
 
        }
 }
 
-struct file_operations fat_file_operations = {
+const struct file_operations fat_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
 
  * is contain the open that then fills in the correct operations
  * depending on the access mode of the file...
  */
-struct file_operations def_fifo_fops = {
+const struct file_operations def_fifo_fops = {
        .open           = fifo_open,    /* will set read or write pipe_fops */
 };
 
 
 /* vxfs_lookup.c */
 extern struct inode_operations vxfs_dir_inode_ops;
-extern struct file_operations  vxfs_dir_operations;
+extern const struct file_operations    vxfs_dir_operations;
 
 /* vxfs_olt.c */
 extern int                     vxfs_read_olt(struct super_block *, u_long);
 
        .lookup =               vxfs_lookup,
 };
 
-struct file_operations vxfs_dir_operations = {
+const struct file_operations vxfs_dir_operations = {
        .readdir =              vxfs_readdir,
 };
 
 
        return 0;
 }
 
-struct file_operations fuse_dev_operations = {
+const struct file_operations fuse_dev_operations = {
        .owner          = THIS_MODULE,
        .llseek         = no_llseek,
        .read           = fuse_dev_read,
 
        .removexattr    = fuse_removexattr,
 };
 
-static struct file_operations fuse_dir_operations = {
+static const struct file_operations fuse_dir_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_read_dir,
        .readdir        = fuse_readdir,
 
 #include <linux/slab.h>
 #include <linux/kernel.h>
 
-static struct file_operations fuse_direct_io_file_operations;
+static const struct file_operations fuse_direct_io_file_operations;
 
 static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
                          struct fuse_open_out *outargp)
        return 0;
 }
 
-static struct file_operations fuse_file_operations = {
+static const struct file_operations fuse_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
        .sendfile       = generic_file_sendfile,
 };
 
-static struct file_operations fuse_direct_io_file_operations = {
+static const struct file_operations fuse_direct_io_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = fuse_direct_read,
        .write          = fuse_direct_write,
 
 }
 
 /** Device operations */
-extern struct file_operations fuse_dev_operations;
+extern const struct file_operations fuse_dev_operations;
 
 /**
  * This is the single global spinlock which protects FUSE's structures
 
        return res;
 }
 
-struct file_operations hfs_dir_operations = {
+const struct file_operations hfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = hfs_readdir,
        .llseek         = generic_file_llseek,
 
 extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);
 
 /* dir.c */
-extern struct file_operations hfs_dir_operations;
+extern const struct file_operations hfs_dir_operations;
 extern struct inode_operations hfs_dir_inode_operations;
 
 /* extent.c */
 
 #include "hfs_fs.h"
 #include "btree.h"
 
-static struct file_operations hfs_file_operations;
+static const struct file_operations hfs_file_operations;
 static struct inode_operations hfs_file_inode_operations;
 
 /*================ Variable-like macros ================*/
 }
 
 
-static struct file_operations hfs_file_operations = {
+static const struct file_operations hfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
        .rename         = hfsplus_rename,
 };
 
-struct file_operations hfsplus_dir_operations = {
+const struct file_operations hfsplus_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = hfsplus_readdir,
        .ioctl          = hfsplus_ioctl,
 
        .listxattr      = hfsplus_listxattr,
 };
 
-static struct file_operations hfsplus_file_operations = {
+static const struct file_operations hfsplus_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
        return fsync_file(HOSTFS_I(dentry->d_inode)->fd, datasync);
 }
 
-static struct file_operations hostfs_file_fops = {
+static const struct file_operations hostfs_file_fops = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .sendfile       = generic_file_sendfile,
        .fsync          = hostfs_fsync,
 };
 
-static struct file_operations hostfs_dir_fops = {
+static const struct file_operations hostfs_dir_fops = {
        .llseek         = generic_file_llseek,
        .readdir        = hostfs_readdir,
        .read           = generic_read_dir,
 
        return ERR_PTR(-ENOENT);
 }
 
-struct file_operations hpfs_dir_ops =
+const struct file_operations hpfs_dir_ops =
 {
        .llseek         = hpfs_dir_lseek,
        .read           = generic_read_dir,
 
        return retval;
 }
 
-struct file_operations hpfs_file_ops =
+const struct file_operations hpfs_file_ops =
 {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
 
 /* dir.c */
 
 struct dentry *hpfs_lookup(struct inode *, struct dentry *, struct nameidata *);
-extern struct file_operations hpfs_dir_ops;
+extern const struct file_operations hpfs_dir_ops;
 
 /* dnode.c */
 
 /* file.c */
 
 int hpfs_file_fsync(struct file *, struct dentry *, int);
-extern struct file_operations hpfs_file_ops;
+extern const struct file_operations hpfs_file_ops;
 extern struct inode_operations hpfs_file_iops;
 extern struct address_space_operations hpfs_aops;
 
 
        return(default_llseek(file, off, where));
 }
 
-static struct file_operations hppfs_file_fops = {
+static const struct file_operations hppfs_file_fops = {
        .owner          = NULL,
        .llseek         = hppfs_llseek,
        .read           = hppfs_read,
        return(0);
 }
 
-static struct file_operations hppfs_dir_fops = {
+static const struct file_operations hppfs_dir_fops = {
        .owner          = NULL,
        .readdir        = hppfs_readdir,
        .open           = hppfs_dir_open,
 
 
 static struct super_operations hugetlbfs_ops;
 static struct address_space_operations hugetlbfs_aops;
-struct file_operations hugetlbfs_file_operations;
+const struct file_operations hugetlbfs_file_operations;
 static struct inode_operations hugetlbfs_dir_inode_operations;
 static struct inode_operations hugetlbfs_inode_operations;
 
                inode_init_once(&ei->vfs_inode);
 }
 
-struct file_operations hugetlbfs_file_operations = {
+const struct file_operations hugetlbfs_file_operations = {
        .mmap                   = hugetlbfs_file_mmap,
        .fsync                  = simple_sync_file,
        .get_unmapped_area      = hugetlb_get_unmapped_area,
 
        return ret;
 }
 
-static struct file_operations inotify_fops = {
+static const struct file_operations inotify_fops = {
        .poll           = inotify_poll,
        .read           = inotify_read,
        .release        = inotify_release,
 
 
 static int isofs_readdir(struct file *, void *, filldir_t);
 
-struct file_operations isofs_dir_operations =
+const struct file_operations isofs_dir_operations =
 {
        .read           = generic_read_dir,
        .readdir        = isofs_readdir,
 
 }
 
 extern struct inode_operations isofs_dir_inode_operations;
-extern struct file_operations isofs_dir_operations;
+extern const struct file_operations isofs_dir_operations;
 extern struct address_space_operations isofs_symlink_aops;
 extern struct export_operations isofs_export_ops;
 
 static int jffs_remove(struct inode *dir, struct dentry *dentry, int type);
 
 static struct super_operations jffs_ops;
-static struct file_operations jffs_file_operations;
+static const struct file_operations jffs_file_operations;
 static struct inode_operations jffs_file_inode_operations;
-static struct file_operations jffs_dir_operations;
+static const struct file_operations jffs_dir_operations;
 static struct inode_operations jffs_dir_inode_operations;
 static struct address_space_operations jffs_address_operations;
 
 }
 
 
-static struct file_operations jffs_file_operations =
+static const struct file_operations jffs_file_operations =
 {
        .open           = generic_file_open,
        .llseek         = generic_file_llseek,
 };
 
 
-static struct file_operations jffs_dir_operations =
+static const struct file_operations jffs_dir_operations =
 {
        .readdir        = jffs_readdir,
 };
 
 static int jffs2_rename (struct inode *, struct dentry *,
                         struct inode *, struct dentry *);
 
-struct file_operations jffs2_dir_operations =
+const struct file_operations jffs2_dir_operations =
 {
        .read =         generic_read_dir,
        .readdir =      jffs2_readdir,
 
        return 0;
 }
 
-struct file_operations jffs2_file_operations =
+const struct file_operations jffs2_file_operations =
 {
        .llseek =       generic_file_llseek,
        .open =         generic_file_open,
 
 void jffs2_garbage_collect_trigger(struct jffs2_sb_info *c);
 
 /* dir.c */
-extern struct file_operations jffs2_dir_operations;
+extern const struct file_operations jffs2_dir_operations;
 extern struct inode_operations jffs2_dir_inode_operations;
 
 /* file.c */
-extern struct file_operations jffs2_file_operations;
+extern const struct file_operations jffs2_file_operations;
 extern struct inode_operations jffs2_file_inode_operations;
 extern struct address_space_operations jffs2_file_address_operations;
 int jffs2_fsync(struct file *, struct dentry *, int);
 
 #endif
 };
 
-struct file_operations jfs_file_operations = {
+const struct file_operations jfs_file_operations = {
        .open           = jfs_open,
        .llseek         = generic_file_llseek,
        .write          = generic_file_write,
 
 
 extern struct address_space_operations jfs_aops;
 extern struct inode_operations jfs_dir_inode_operations;
-extern struct file_operations jfs_dir_operations;
+extern const struct file_operations jfs_dir_operations;
 extern struct inode_operations jfs_file_inode_operations;
-extern struct file_operations jfs_file_operations;
+extern const struct file_operations jfs_file_operations;
 extern struct inode_operations jfs_symlink_inode_operations;
 extern struct dentry_operations jfs_ci_dentry_operations;
 #endif                         /* _H_JFS_INODE */
 
 #endif
 };
 
-struct file_operations jfs_dir_operations = {
+const struct file_operations jfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = jfs_readdir,
        .fsync          = jfs_fsync,
 
        return -EISDIR;
 }
 
-struct file_operations simple_dir_operations = {
+const struct file_operations simple_dir_operations = {
        .open           = dcache_dir_open,
        .release        = dcache_dir_close,
        .llseek         = dcache_dir_lseek,
 
 
 static int minix_readdir(struct file *, void *, filldir_t);
 
-struct file_operations minix_dir_operations = {
+const struct file_operations minix_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = minix_readdir,
        .fsync          = minix_sync_file,
 
  */
 int minix_sync_file(struct file *, struct dentry *, int);
 
-struct file_operations minix_file_operations = {
+const struct file_operations minix_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
 
 extern struct inode_operations minix_file_inode_operations;
 extern struct inode_operations minix_dir_inode_operations;
-extern struct file_operations minix_file_operations;
-extern struct file_operations minix_dir_operations;
+extern const struct file_operations minix_file_operations;
+extern const struct file_operations minix_dir_operations;
 extern struct dentry_operations minix_dentry_operations;
 
 static inline struct minix_sb_info *minix_sb(struct super_block *sb)
 
 #define ncp_symlink NULL
 #endif
                      
-struct file_operations ncp_dir_operations =
+const struct file_operations ncp_dir_operations =
 {
        .read           = generic_read_dir,
        .readdir        = ncp_readdir,
 
        return 0;
 }
 
-struct file_operations ncp_file_operations =
+const struct file_operations ncp_file_operations =
 {
        .llseek         = remote_llseek,
        .read           = ncp_file_read,
 
 static int nfs_fsync_dir(struct file *, struct dentry *, int);
 static loff_t nfs_llseek_dir(struct file *, loff_t, int);
 
-struct file_operations nfs_dir_operations = {
+const struct file_operations nfs_dir_operations = {
        .llseek         = nfs_llseek_dir,
        .read           = generic_read_dir,
        .readdir        = nfs_readdir,
 
 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl);
 static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl);
 
-struct file_operations nfs_file_operations = {
+const struct file_operations nfs_file_operations = {
        .llseek         = nfs_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
 
        return simple_transaction_read(file, buf, size, pos);
 }
 
-static struct file_operations transaction_ops = {
+static const struct file_operations transaction_ops = {
        .write          = nfsctl_transaction_write,
        .read           = nfsctl_transaction_read,
        .release        = simple_transaction_release,
        return seq_open(file, &nfs_exports_op);
 }
 
-static struct file_operations exports_operations = {
+static const struct file_operations exports_operations = {
        .open           = exports_open,
        .read           = seq_read,
        .llseek         = seq_lseek,
 
        return single_open(file, nfsd_proc_show, NULL);
 }
 
-static struct file_operations nfsd_proc_fops = {
+static const struct file_operations nfsd_proc_fops = {
        .owner = THIS_MODULE,
        .open = nfsd_proc_open,
        .read  = seq_read,
 
 
 #endif /* NTFS_RW */
 
-struct file_operations ntfs_dir_ops = {
+const struct file_operations ntfs_dir_ops = {
        .llseek         = generic_file_llseek,  /* Seek inside directory. */
        .read           = generic_read_dir,     /* Return -EISDIR. */
        .readdir        = ntfs_readdir,         /* Read directory contents. */
 
 
 #endif /* NTFS_RW */
 
-struct file_operations ntfs_file_ops = {
+const struct file_operations ntfs_file_ops = {
        .llseek         = generic_file_llseek,   /* Seek inside file. */
        .read           = generic_file_read,     /* Read from file. */
        .aio_read       = generic_file_aio_read, /* Async read from file. */
 #endif /* NTFS_RW */
 };
 
-struct file_operations ntfs_empty_file_ops = {};
+const struct file_operations ntfs_empty_file_ops = {};
 
 struct inode_operations ntfs_empty_inode_ops = {};
 
 extern struct address_space_operations ntfs_aops;
 extern struct address_space_operations ntfs_mst_aops;
 
-extern struct  file_operations ntfs_file_ops;
+extern const struct  file_operations ntfs_file_ops;
 extern struct inode_operations ntfs_file_inode_ops;
 
-extern struct  file_operations ntfs_dir_ops;
+extern const struct  file_operations ntfs_dir_ops;
 extern struct inode_operations ntfs_dir_inode_ops;
 
-extern struct  file_operations ntfs_empty_file_ops;
+extern const struct  file_operations ntfs_empty_file_ops;
 extern struct inode_operations ntfs_empty_inode_ops;
 
 extern struct export_operations ntfs_export_ops;
 
        return ret;
 }
 
-static struct file_operations ocfs2_dlm_debug_fops = {
+static const struct file_operations ocfs2_dlm_debug_fops = {
        .open =         ocfs2_dlm_debug_open,
        .release =      ocfs2_dlm_debug_release,
        .read =         seq_read,
 
        .getattr        = ocfs2_getattr,
 };
 
-struct file_operations ocfs2_fops = {
+const struct file_operations ocfs2_fops = {
        .read           = do_sync_read,
        .write          = do_sync_write,
        .sendfile       = generic_file_sendfile,
        .aio_write      = ocfs2_file_aio_write,
 };
 
-struct file_operations ocfs2_dops = {
+const struct file_operations ocfs2_dops = {
        .read           = generic_read_dir,
        .readdir        = ocfs2_readdir,
        .fsync          = ocfs2_sync_file,
 
 #ifndef OCFS2_FILE_H
 #define OCFS2_FILE_H
 
-extern struct file_operations ocfs2_fops;
-extern struct file_operations ocfs2_dops;
+extern const struct file_operations ocfs2_fops;
+extern const struct file_operations ocfs2_dops;
 extern struct inode_operations ocfs2_file_iops;
 extern struct inode_operations ocfs2_special_file_iops;
 struct ocfs2_alloc_context;
 
        return 0;
 }
 
-static struct file_operations openpromfs_prop_ops = {
+static const struct file_operations openpromfs_prop_ops = {
        .read           = property_read,
        .write          = property_write,
        .release        = property_release,
 };
 
-static struct file_operations openpromfs_nodenum_ops = {
+static const struct file_operations openpromfs_nodenum_ops = {
        .read           = nodenum_read,
 };
 
-static struct file_operations openprom_operations = {
+static const struct file_operations openprom_operations = {
        .read           = generic_read_dir,
        .readdir        = openpromfs_readdir,
 };
 
  * The file_operations structs are not static because they
  * are also used in linux/fs/fifo.c to do operations on FIFOs.
  */
-struct file_operations read_fifo_fops = {
+const struct file_operations read_fifo_fops = {
        .llseek         = no_llseek,
        .read           = pipe_read,
        .readv          = pipe_readv,
        .fasync         = pipe_read_fasync,
 };
 
-struct file_operations write_fifo_fops = {
+const struct file_operations write_fifo_fops = {
        .llseek         = no_llseek,
        .read           = bad_pipe_r,
        .write          = pipe_write,
        .fasync         = pipe_write_fasync,
 };
 
-struct file_operations rdwr_fifo_fops = {
+const struct file_operations rdwr_fifo_fops = {
        .llseek         = no_llseek,
        .read           = pipe_read,
        .readv          = pipe_readv,
 
 
 static ssize_t read_kcore(struct file *, char __user *, size_t, loff_t *);
 
-struct file_operations proc_kcore_operations = {
+const struct file_operations proc_kcore_operations = {
        .read           = read_kcore,
        .open           = open_kcore,
 };
 
 }
 
 
-struct file_operations proc_kmsg_operations = {
+const struct file_operations proc_kmsg_operations = {
        .read           = kmsg_read,
        .poll           = kmsg_poll,
        .open           = kmsg_open,
 
        return 0;
 }
 
-struct file_operations proc_vmcore_operations = {
+const struct file_operations proc_vmcore_operations = {
        .read           = read_vmcore,
        .open           = open_vmcore,
 };
 
        return 0;
 }
 
-struct file_operations qnx4_dir_operations =
+const struct file_operations qnx4_dir_operations =
 {
        .read           = generic_read_dir,
        .readdir        = qnx4_readdir,
 
  * We have mostly NULL's here: the current defaults are ok for
  * the qnx4 filesystem.
  */
-struct file_operations qnx4_file_operations =
+const struct file_operations qnx4_file_operations =
 {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
 
        .commit_write   = simple_commit_write
 };
 
-struct file_operations ramfs_file_operations = {
+const struct file_operations ramfs_file_operations = {
        .read           = generic_file_read,
        .write          = generic_file_write,
        .mmap           = generic_file_mmap,
 
        .commit_write           = simple_commit_write
 };
 
-struct file_operations ramfs_file_operations = {
+const struct file_operations ramfs_file_operations = {
        .mmap                   = ramfs_nommu_mmap,
        .get_unmapped_area      = ramfs_nommu_get_unmapped_area,
        .read                   = generic_file_read,
 
 
 
 extern struct address_space_operations ramfs_aops;
-extern struct file_operations ramfs_file_operations;
+extern const struct file_operations ramfs_file_operations;
 extern struct inode_operations ramfs_file_inode_operations;
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
-struct file_operations generic_ro_fops = {
+const struct file_operations generic_ro_fops = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .mmap           = generic_file_readonly_mmap,
 
 static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
                              int datasync);
 
-struct file_operations reiserfs_dir_operations = {
+const struct file_operations reiserfs_dir_operations = {
        .read = generic_read_dir,
        .readdir = reiserfs_readdir,
        .fsync = reiserfs_dir_fsync,
 
        return generic_file_aio_write(iocb, buf, count, pos);
 }
 
-struct file_operations reiserfs_file_operations = {
+const struct file_operations reiserfs_file_operations = {
        .read = generic_file_read,
        .write = reiserfs_file_write,
        .ioctl = reiserfs_ioctl,
 
        return ret;
 }
 
-static struct file_operations r_file_operations = {
+static const struct file_operations r_file_operations = {
        .open = r_open,
        .read = seq_read,
        .llseek = seq_lseek,
 
        .readpage = romfs_readpage
 };
 
-static struct file_operations romfs_dir_operations = {
+static const struct file_operations romfs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = romfs_readdir,
 };
 
 static int smb_make_node(struct inode *,struct dentry *,int,dev_t);
 static int smb_link(struct dentry *, struct inode *, struct dentry *);
 
-struct file_operations smb_dir_operations =
+const struct file_operations smb_dir_operations =
 {
        .read           = generic_read_dir,
        .readdir        = smb_readdir,
 
        return error;
 }
 
-struct file_operations smb_file_operations =
+const struct file_operations smb_file_operations =
 {
        .llseek         = remote_llseek,
        .read           = smb_file_read,
 
 extern int smb_proc_link(struct smb_sb_info *server, struct dentry *dentry, struct dentry *new_dentry);
 extern void smb_install_null_ops(struct smb_ops *ops);
 /* dir.c */
-extern struct file_operations smb_dir_operations;
+extern const struct file_operations smb_dir_operations;
 extern struct inode_operations smb_dir_inode_operations;
 extern struct inode_operations smb_dir_inode_operations_unix;
 extern void smb_new_dentry(struct dentry *dentry);
 extern int smb_notify_change(struct dentry *dentry, struct iattr *attr);
 /* file.c */
 extern struct address_space_operations smb_file_aops;
-extern struct file_operations smb_file_operations;
+extern const struct file_operations smb_file_operations;
 extern struct inode_operations smb_file_inode_operations;
 /* ioctl.c */
 extern int smb_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg);
 
        return 0;
 }
 
-struct file_operations bin_fops = {
+const struct file_operations bin_fops = {
        .read           = read,
        .write          = write,
        .mmap           = mmap,
 
        return offset;
 }
 
-struct file_operations sysfs_dir_operations = {
+const struct file_operations sysfs_dir_operations = {
        .open           = sysfs_dir_open,
        .release        = sysfs_dir_close,
        .llseek         = sysfs_dir_lseek,
 
        return 0;
 }
 
-struct file_operations sysfs_file_operations = {
+const struct file_operations sysfs_file_operations = {
        .read           = sysfs_read_file,
        .write          = sysfs_write_file,
        .llseek         = generic_file_llseek,
 
 
 extern struct rw_semaphore sysfs_rename_sem;
 extern struct super_block * sysfs_sb;
-extern struct file_operations sysfs_dir_operations;
-extern struct file_operations sysfs_file_operations;
-extern struct file_operations bin_fops;
+extern const struct file_operations sysfs_dir_operations;
+extern const struct file_operations sysfs_file_operations;
+extern const struct file_operations bin_fops;
 extern struct inode_operations sysfs_dir_inode_operations;
 extern struct inode_operations sysfs_symlink_inode_operations;
 
 
 
 static int sysv_readdir(struct file *, void *, filldir_t);
 
-struct file_operations sysv_dir_operations = {
+const struct file_operations sysv_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = sysv_readdir,
        .fsync          = sysv_sync_file,
 
  * We have mostly NULLs here: the current defaults are OK for
  * the coh filesystem.
  */
-struct file_operations sysv_file_operations = {
+const struct file_operations sysv_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
 extern struct inode_operations sysv_file_inode_operations;
 extern struct inode_operations sysv_dir_inode_operations;
 extern struct inode_operations sysv_fast_symlink_inode_operations;
-extern struct file_operations sysv_file_operations;
-extern struct file_operations sysv_dir_operations;
+extern const struct file_operations sysv_file_operations;
+extern const struct file_operations sysv_dir_operations;
 extern struct address_space_operations sysv_aops;
 extern struct super_operations sysv_sops;
 extern struct dentry_operations sysv_dentry_operations;
 
 
 /* readdir and lookup functions */
 
-struct file_operations udf_dir_operations = {
+const struct file_operations udf_dir_operations = {
        .read                   = generic_read_dir,
        .readdir                = udf_readdir,
        .ioctl                  = udf_ioctl,
 
        return 0;
 }
 
-struct file_operations udf_file_operations = {
+const struct file_operations udf_file_operations = {
        .read                   = generic_file_read,
        .ioctl                  = udf_ioctl,
        .open                   = generic_file_open,
 
 struct super_block;
 
 extern struct inode_operations udf_dir_inode_operations;
-extern struct file_operations udf_dir_operations;
+extern const struct file_operations udf_dir_operations;
 extern struct inode_operations udf_file_inode_operations;
-extern struct file_operations udf_file_operations;
+extern const struct file_operations udf_file_operations;
 extern struct address_space_operations udf_aops;
 extern struct address_space_operations udf_adinicb_aops;
 extern struct address_space_operations udf_symlink_aops;
 
        return 1;
 }
 
-struct file_operations ufs_dir_operations = {
+const struct file_operations ufs_dir_operations = {
        .read           = generic_read_dir,
        .readdir        = ufs_readdir,
        .fsync          = file_fsync,
 
  * the ufs filesystem.
  */
  
-struct file_operations ufs_file_operations = {
+const struct file_operations ufs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .write          = generic_file_write,
 
 }
 #endif /* HAVE_FOP_OPEN_EXEC */
 
-struct file_operations xfs_file_operations = {
+const struct file_operations xfs_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
 #endif
 };
 
-struct file_operations xfs_invis_file_operations = {
+const struct file_operations xfs_invis_file_operations = {
        .llseek         = generic_file_llseek,
        .read           = do_sync_read,
        .write          = do_sync_write,
 };
 
 
-struct file_operations xfs_dir_file_operations = {
+const struct file_operations xfs_dir_file_operations = {
        .read           = generic_read_dir,
        .readdir        = xfs_file_readdir,
        .unlocked_ioctl = xfs_file_ioctl,
 
 extern struct inode_operations xfs_dir_inode_operations;
 extern struct inode_operations xfs_symlink_inode_operations;
 
-extern struct file_operations xfs_file_operations;
-extern struct file_operations xfs_dir_file_operations;
-extern struct file_operations xfs_invis_file_operations;
+extern const struct file_operations xfs_file_operations;
+extern const struct file_operations xfs_dir_file_operations;
+extern const struct file_operations xfs_invis_file_operations;
 
 extern int xfs_ioctl(struct bhv_desc *, struct inode *, struct file *,
                         int, unsigned int, void __user *);
 
 extern struct address_space_operations coda_file_aops;
 extern struct address_space_operations coda_symlink_aops;
 
-extern struct file_operations coda_dir_operations;
-extern struct file_operations coda_file_operations;
-extern struct file_operations coda_ioctl_operations;
+extern const struct file_operations coda_dir_operations;
+extern const struct file_operations coda_file_operations;
+extern const struct file_operations coda_ioctl_operations;
 
 /* operations shared over more than one file */
 int coda_open(struct inode *i, struct file *f);
 
 extern unsigned long long elfcorehdr_addr;
 extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
                                                unsigned long, int);
-extern struct file_operations proc_vmcore_operations;
+extern const struct file_operations proc_vmcore_operations;
 extern struct proc_dir_entry *proc_vmcore;
 
 #endif /* CONFIG_CRASH_DUMP */
 
 struct statfs;
 
 extern struct inode_operations efs_dir_inode_operations;
-extern struct file_operations efs_dir_operations;
+extern const struct file_operations efs_dir_operations;
 extern struct address_space_operations efs_symlink_aops;
 
 extern void efs_read_inode(struct inode *);
 
  */
 
 /* dir.c */
-extern struct file_operations ext3_dir_operations;
+extern const struct file_operations ext3_dir_operations;
 
 /* file.c */
 extern struct inode_operations ext3_file_inode_operations;
-extern struct file_operations ext3_file_operations;
+extern const struct file_operations ext3_file_operations;
 
 /* namei.c */
 extern struct inode_operations ext3_dir_inode_operations;
 
 extern void bd_forget(struct inode *inode);
 extern void bdput(struct block_device *);
 extern struct block_device *open_by_devnum(dev_t, unsigned);
-extern struct file_operations def_blk_fops;
+extern const struct file_operations def_blk_fops;
 extern struct address_space_operations def_blk_aops;
-extern struct file_operations def_chr_fops;
-extern struct file_operations bad_sock_fops;
-extern struct file_operations def_fifo_fops;
+extern const struct file_operations def_chr_fops;
+extern const struct file_operations bad_sock_fops;
+extern const struct file_operations def_fifo_fops;
 extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
 extern int blkdev_ioctl(struct inode *, struct file *, unsigned, unsigned long);
 extern long compat_blkdev_ioctl(struct file *, unsigned, unsigned long);
 extern void make_bad_inode(struct inode *);
 extern int is_bad_inode(struct inode *);
 
-extern struct file_operations read_fifo_fops;
-extern struct file_operations write_fifo_fops;
-extern struct file_operations rdwr_fifo_fops;
+extern const struct file_operations read_fifo_fops;
+extern const struct file_operations write_fifo_fops;
+extern const struct file_operations rdwr_fifo_fops;
 
 extern int fs_may_remount_ro(struct super_block *);
 
                                nr_segs, get_block, end_io, DIO_OWN_LOCKING);
 }
 
-extern struct file_operations generic_ro_fops;
+extern const struct file_operations generic_ro_fops;
 
 #define special_file(m) (S_ISCHR(m)||S_ISBLK(m)||S_ISFIFO(m)||S_ISSOCK(m))
 
 
 extern struct dentry *simple_lookup(struct inode *, struct dentry *, struct nameidata *);
 extern ssize_t generic_read_dir(struct file *, char __user *, size_t, loff_t *);
-extern struct file_operations simple_dir_operations;
+extern const struct file_operations simple_dir_operations;
 extern struct inode_operations simple_dir_inode_operations;
-struct tree_descr { char *name; struct file_operations *ops; int mode; };
+struct tree_descr { char *name; const struct file_operations *ops; int mode; };
 struct dentry *d_alloc_name(struct dentry *, const char *);
 extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
 extern int simple_pin_fs(char *name, struct vfsmount **mount, int *count);
 
        return sb->s_fs_info;
 }
 
-extern struct file_operations hugetlbfs_file_operations;
+extern const struct file_operations hugetlbfs_file_operations;
 extern struct vm_operations_struct hugetlb_vm_ops;
 struct file *hugetlb_zero_setup(size_t);
 int hugetlb_extend_reservation(struct hugetlbfs_inode_info *info,
 
                    unsigned long *mapped_blocks);
 
 /* fat/dir.c */
-extern struct file_operations fat_dir_operations;
+extern const struct file_operations fat_dir_operations;
 extern int fat_search_long(struct inode *inode, const unsigned char *name,
                           int name_len, struct fat_slot_info *sinfo);
 extern int fat_dir_empty(struct inode *dir);
 /* fat/file.c */
 extern int fat_generic_ioctl(struct inode *inode, struct file *filp,
                             unsigned int cmd, unsigned long arg);
-extern struct file_operations fat_file_operations;
+extern const struct file_operations fat_file_operations;
 extern struct inode_operations fat_file_inode_operations;
 extern int fat_notify_change(struct dentry * dentry, struct iattr * attr);
 extern void fat_truncate(struct inode *inode);
 
 
 /* linux/fs/ncpfs/dir.c */
 extern struct inode_operations ncp_dir_inode_operations;
-extern struct file_operations ncp_dir_operations;
+extern const struct file_operations ncp_dir_operations;
 int ncp_conn_logged_in(struct super_block *);
 int ncp_date_dos2unix(__le16 time, __le16 date);
 void ncp_date_unix2dos(int unix_date, __le16 * time, __le16 * date);
 
 /* linux/fs/ncpfs/file.c */
 extern struct inode_operations ncp_file_inode_operations;
-extern struct file_operations ncp_file_operations;
+extern const struct file_operations ncp_file_operations;
 int ncp_make_open(struct inode *, int);
 
 /* linux/fs/ncpfs/mmap.c */
 
 #ifdef CONFIG_NFS_V3
 extern struct inode_operations nfs3_file_inode_operations;
 #endif /* CONFIG_NFS_V3 */
-extern struct file_operations nfs_file_operations;
+extern const struct file_operations nfs_file_operations;
 extern struct address_space_operations nfs_file_aops;
 
 static inline struct rpc_cred *nfs_file_cred(struct file *file)
 #ifdef CONFIG_NFS_V3
 extern struct inode_operations nfs3_dir_inode_operations;
 #endif /* CONFIG_NFS_V3 */
-extern struct file_operations nfs_dir_operations;
+extern const struct file_operations nfs_dir_operations;
 extern struct dentry_operations nfs_dentry_operations;
 
 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
 
 extern int proc_readdir(struct file *, void *, filldir_t);
 extern struct dentry *proc_lookup(struct inode *, struct dentry *, struct nameidata *);
 
-extern struct file_operations proc_kcore_operations;
-extern struct file_operations proc_kmsg_operations;
-extern struct file_operations ppc_htab_operations;
+extern const struct file_operations proc_kcore_operations;
+extern const struct file_operations proc_kmsg_operations;
+extern const struct file_operations ppc_htab_operations;
 
 /*
  * proc_tty.c
 
 
 extern struct inode_operations qnx4_file_inode_operations;
 extern struct inode_operations qnx4_dir_inode_operations;
-extern struct file_operations qnx4_file_operations;
-extern struct file_operations qnx4_dir_operations;
+extern const struct file_operations qnx4_file_operations;
+extern const struct file_operations qnx4_dir_operations;
 extern int qnx4_is_free(struct super_block *sb, long block);
 extern int qnx4_set_bitmap(struct super_block *sb, long block, int busy);
 extern int qnx4_create(struct inode *inode, struct dentry *dentry, int mode, struct nameidata *nd);
 
 extern int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma);
 #endif
 
-extern struct file_operations ramfs_file_operations;
+extern const struct file_operations ramfs_file_operations;
 extern struct vm_operations_struct generic_file_vm_ops;
 
 #endif
 
 extern struct inode_operations reiserfs_dir_inode_operations;
 extern struct inode_operations reiserfs_symlink_inode_operations;
 extern struct inode_operations reiserfs_special_inode_operations;
-extern struct file_operations reiserfs_dir_operations;
+extern const struct file_operations reiserfs_dir_operations;
 
 /* tail_conversion.c */
 int direct2indirect(struct reiserfs_transaction_handle *, struct inode *,
 
 /* file.c */
 extern struct inode_operations reiserfs_file_inode_operations;
-extern struct file_operations reiserfs_file_operations;
+extern const struct file_operations reiserfs_file_operations;
 extern struct address_space_operations reiserfs_address_space_operations;
 
 /* fix_nodes.c */
 
 
 /* file.c */
 extern struct inode_operations ufs_file_inode_operations;
-extern struct file_operations ufs_file_operations;
+extern const struct file_operations ufs_file_operations;
 
 extern struct address_space_operations ufs_aops;
 
 extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
 
 /* namei.c */
-extern struct file_operations ufs_dir_operations;
+extern const struct file_operations ufs_dir_operations;
         
 /* super.c */
 extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 
        return -ENXIO;
 }
 
-struct file_operations bad_sock_fops = {
+const struct file_operations bad_sock_fops = {
        .owner = THIS_MODULE,
        .open = sock_no_open,
 };
 
        return -ENXIO;
 }
 
-struct file_operations bad_sock_fops = {
+const struct file_operations bad_sock_fops = {
        .owner = THIS_MODULE,
        .open = sock_no_open,
 };