namei: unlazy_walk() doesn't need to mess with current->fs anymore
now that we have ->root_seq, legitimize_path(&nd->root, nd->root_seq)
will do just fine...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index a5ed0d0..0cccb24 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -651,7 +651,6 @@
*/
static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq)
{
- struct fs_struct *fs = current->fs;
struct dentry *parent = nd->path.dentry;
BUG_ON(!(nd->flags & LOOKUP_RCU));
@@ -691,13 +690,11 @@
* still valid and get it if required.
*/
if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) {
- spin_lock(&fs->lock);
- if (unlikely(!path_equal(&nd->root, &fs->root))) {
- spin_unlock(&fs->lock);
- goto drop_dentry;
+ if (unlikely(!legitimize_path(nd, &nd->root, nd->root_seq))) {
+ rcu_read_unlock();
+ dput(dentry);
+ return -ECHILD;
}
- path_get(&nd->root);
- spin_unlock(&fs->lock);
}
rcu_read_unlock();