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authorAl Viro <viro@zeniv.linux.org.uk>2011-11-23 19:34:49 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-03 22:52:36 -0500
commitafac7cba7ed31968a95e181dc25e204e45009ea8 (patch)
tree282cf7da6bc3915093df622ebfcd39f44f6fd1cd /fs/pnode.c
parentb2dba1af3c4157040303a76d25216b1713d333d0 (diff)
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vfs: more mnt_parent cleanups
a) mount --move is checking that ->mnt_parent is non-NULL before looking if that parent happens to be shared; ->mnt_parent is never NULL and it's not even an misspelled !mnt_has_parent() b) pivot_root open-codes is_path_reachable(), poorly. c) so does path_is_under(), while we are at it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/pnode.c')
-rw-r--r--fs/pnode.c15
1 files changed, 0 insertions, 15 deletions
diff --git a/fs/pnode.c b/fs/pnode.c
index f1cd958..4d5a06e 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -28,21 +28,6 @@ static inline struct vfsmount *next_slave(struct vfsmount *p)
return list_entry(p->mnt_slave.next, struct vfsmount, mnt_slave);
}
-/*
- * Return true if path is reachable from root
- *
- * namespace_sem is held, and mnt is attached
- */
-static bool is_path_reachable(struct vfsmount *mnt, struct dentry *dentry,
- const struct path *root)
-{
- while (mnt != root->mnt && mnt_has_parent(mnt)) {
- dentry = mnt->mnt_mountpoint;
- mnt = mnt->mnt_parent;
- }
- return mnt == root->mnt && is_subdir(dentry, root->dentry);
-}
-
static struct vfsmount *get_peer_under_root(struct vfsmount *mnt,
struct mnt_namespace *ns,
const struct path *root)