constify fsnotify_parent()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index e6ea675..0cf34d6c 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -247,7 +247,7 @@ struct fsnotify_mark {
 /* main fsnotify call to send events */
 extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
 		    const unsigned char *name, u32 cookie);
-extern int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask);
+extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask);
 extern void __fsnotify_inode_delete(struct inode *inode);
 extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt);
 extern u32 fsnotify_get_cookie(void);
@@ -363,7 +363,7 @@ static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data,
 	return 0;
 }
 
-static inline int __fsnotify_parent(struct path *path, struct dentry *dentry, __u32 mask)
+static inline int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask)
 {
 	return 0;
 }