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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/dcache.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/dcache.c')
-rw-r--r--fs/dcache.c25
1 files changed, 0 insertions, 25 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 8a75e3b0f49..64c8ce4c147 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2853,31 +2853,6 @@ int is_subdir(struct dentry *new_dentry, struct dentry *old_dentry)
return result;
}
-int path_is_under(struct path *path1, struct path *path2)
-{
- struct vfsmount *mnt = path1->mnt;
- struct dentry *dentry = path1->dentry;
- int res;
-
- br_read_lock(vfsmount_lock);
- if (mnt != path2->mnt) {
- for (;;) {
- if (!mnt_has_parent(mnt)) {
- br_read_unlock(vfsmount_lock);
- return 0;
- }
- if (mnt->mnt_parent == path2->mnt)
- break;
- mnt = mnt->mnt_parent;
- }
- dentry = mnt->mnt_mountpoint;
- }
- res = is_subdir(dentry, path2->dentry);
- br_read_unlock(vfsmount_lock);
- return res;
-}
-EXPORT_SYMBOL(path_is_under);
-
void d_genocide(struct dentry *root)
{
struct dentry *this_parent;