[PATCH] VFS: Remove lives_below_in_same_fs()

[Jan Blunck <jblunck@suse.de>]

This is another cleanup which removes lives_below_in_same_fs() since
is_subdir() from fs/dcache.c is providing the same functionality and is more
widespreadly used.

Signed-off-by: Jan Blunck <jblunck@suse.de>
---
 fs/namespace.c |   13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

Index: b/fs/namespace.c
===================================================================
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1036,17 +1036,6 @@ static bool permit_mount(struct nameidat
 	return true;
 }
 
-static int lives_below_in_same_fs(struct dentry *d, struct dentry *dentry)
-{
-	while (1) {
-		if (d == dentry)
-			return 1;
-		if (d == NULL || d == d->d_parent)
-			return 0;
-		d = d->d_parent;
-	}
-}
-
 struct vfsmount *copy_tree(struct vfsmount *mnt, struct dentry *dentry,
 					int flag, uid_t owner)
 {
@@ -1063,7 +1052,7 @@ struct vfsmount *copy_tree(struct vfsmou
 
 	p = mnt;
 	list_for_each_entry(r, &mnt->mnt_mounts, mnt_child) {
-		if (!lives_below_in_same_fs(r->mnt_mountpoint, dentry))
+		if (!is_subdir(r->mnt_mountpoint, dentry))
 			continue;
 
 		for (s = r; s; s = next_mnt(s, r)) {