security: remove dead hook sb_post_remount

Unused hook.  Remove.
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

fs/namespace.c

@@ -1573,8 +1573,6 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
 	}
 	up_write(&sb->s_umount);
 	if (!err) {
-		security_sb_post_remount(path->mnt, flags, data);
-
 		spin_lock(&vfsmount_lock);
 		touch_mnt_namespace(path->mnt->mnt_ns);
 		spin_unlock(&vfsmount_lock);

include/linux/security.h

@@ -272,12 +272,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *	@mnt contains the mounted file system.
  *	@flags contains the unmount flags, e.g. MNT_FORCE.
  *	Return 0 if permission is granted.
- * @sb_post_remount:
- *	Update the security module's state when a filesystem is remounted.
- *	This hook is only called if the remount was successful.
- *	@mnt contains the mounted file system.
- *	@flags contains the new filesystem flags.
- *	@data contains the filesystem-specific data.
  * @sb_post_addmount:
  *	Update the security module's state when a filesystem is mounted.
  *	This hook is called any time a mount is successfully grafetd to
@@ -1468,8 +1462,6 @@ struct security_operations {
 	int (*sb_mount) (char *dev_name, struct path *path,
 			 char *type, unsigned long flags, void *data);
 	int (*sb_umount) (struct vfsmount *mnt, int flags);
-	void (*sb_post_remount) (struct vfsmount *mnt,
-				 unsigned long flags, void *data);
 	void (*sb_post_addmount) (struct vfsmount *mnt,
 				  struct path *mountpoint);
 	int (*sb_pivotroot) (struct path *old_path,
@@ -1764,7 +1756,6 @@ int security_sb_statfs(struct dentry *dentry);
 int security_sb_mount(char *dev_name, struct path *path,
 		      char *type, unsigned long flags, void *data);
 int security_sb_umount(struct vfsmount *mnt, int flags);
-void security_sb_post_remount(struct vfsmount *mnt, unsigned long flags, void *data);
 void security_sb_post_addmount(struct vfsmount *mnt, struct path *mountpoint);
 int security_sb_pivotroot(struct path *old_path, struct path *new_path);
 void security_sb_post_pivotroot(struct path *old_path, struct path *new_path);
@@ -2081,10 +2072,6 @@ static inline int security_sb_umount(struct vfsmount *mnt, int flags)
 	return 0;
 }
 
-static inline void security_sb_post_remount(struct vfsmount *mnt,
-					     unsigned long flags, void *data)
-{ }
-
 static inline void security_sb_post_addmount(struct vfsmount *mnt,
 					     struct path *mountpoint)
 { }

security/capability.c

@@ -85,11 +85,6 @@ static int cap_sb_umount(struct vfsmount *mnt, int flags)
 	return 0;
 }
 
-static void cap_sb_post_remount(struct vfsmount *mnt, unsigned long flags,
-				void *data)
-{
-}
-
 static void cap_sb_post_addmount(struct vfsmount *mnt, struct path *path)
 {
 }
@@ -929,7 +924,6 @@ void security_fixup_ops(struct security_operations *ops)
 	set_to_cap_if_null(ops, sb_statfs);
 	set_to_cap_if_null(ops, sb_mount);
 	set_to_cap_if_null(ops, sb_umount);
-	set_to_cap_if_null(ops, sb_post_remount);
 	set_to_cap_if_null(ops, sb_post_addmount);
 	set_to_cap_if_null(ops, sb_pivotroot);
 	set_to_cap_if_null(ops, sb_post_pivotroot);

security/security.c

@@ -311,11 +311,6 @@ int security_sb_umount(struct vfsmount *mnt, int flags)
 	return security_ops->sb_umount(mnt, flags);
 }
 
-void security_sb_post_remount(struct vfsmount *mnt, unsigned long flags, void *data)
-{
-	security_ops->sb_post_remount(mnt, flags, data);
-}
-
 void security_sb_post_addmount(struct vfsmount *mnt, struct path *mountpoint)
 {
 	security_ops->sb_post_addmount(mnt, mountpoint);