Commit 209a7fb2 authored by Al Viro's avatar Al Viro

lookup_fast(): clean up the logics around the fallback to non-rcu mode

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent ad1633a1
......@@ -1558,12 +1558,7 @@ static int lookup_fast(struct nameidata *nd,
*seqp = seq;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE))
status = d_revalidate(dentry, nd->flags);
if (unlikely(status <= 0)) {
if (unlazy_walk(nd, dentry, seq))
return -ECHILD;
if (status == -ECHILD)
status = d_revalidate(dentry, nd->flags);
} else {
if (likely(status > 0)) {
/*
* Note: do negative dentry check after revalidation in
* case that drops it.
......@@ -1574,9 +1569,12 @@ static int lookup_fast(struct nameidata *nd,
path->dentry = dentry;
if (likely(__follow_mount_rcu(nd, path, inode, seqp)))
return 1;
if (unlazy_walk(nd, dentry, seq))
return -ECHILD;
}
if (unlazy_walk(nd, dentry, seq))
return -ECHILD;
if (unlikely(status == -ECHILD))
/* we'd been told to redo it in non-rcu mode */
status = d_revalidate(dentry, nd->flags);
} else {
dentry = __d_lookup(parent, &nd->last);
if (unlikely(!dentry))
......
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