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-rw-r--r--fs/namei.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 0e1b9c3eb36d..c6dcb4c8f86c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -672,6 +672,16 @@ static int follow_up_rcu(struct path *path)
672 return 1; 672 return 1;
673} 673}
674 674
675/*
676 * follow_up - Find the mountpoint of path's vfsmount
677 *
678 * Given a path, find the mountpoint of its source file system.
679 * Replace @path with the path of the mountpoint in the parent mount.
680 * Up is towards /.
681 *
682 * Return 1 if we went up a level and 0 if we were already at the
683 * root.
684 */
675int follow_up(struct path *path) 685int follow_up(struct path *path)
676{ 686{
677 struct mount *mnt = real_mount(path->mnt); 687 struct mount *mnt = real_mount(path->mnt);