untangling do_lookup() - take __lookup_hash()-calling case out of line.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namei.c b/fs/namei.c
index a919aff..5eeec56 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1208,22 +1208,14 @@
dentry = __d_lookup(parent, name);
}
- if (dentry && unlikely(d_need_lookup(dentry))) {
- dput(dentry);
- dentry = NULL;
- }
-retry:
- if (unlikely(!dentry)) {
- struct inode *dir = parent->d_inode;
- BUG_ON(nd->inode != dir);
+ if (unlikely(!dentry))
+ goto need_lookup;
- mutex_lock(&dir->i_mutex);
- dentry = __lookup_hash(name, parent, nd);
- mutex_unlock(&dir->i_mutex);
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
- goto done;
+ if (unlikely(d_need_lookup(dentry))) {
+ dput(dentry);
+ goto need_lookup;
}
+
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval)
status = d_revalidate(dentry, nd);
if (unlikely(status <= 0)) {
@@ -1233,8 +1225,7 @@
}
if (!d_invalidate(dentry)) {
dput(dentry);
- dentry = NULL;
- goto retry;
+ goto need_lookup;
}
}
done:
@@ -1249,6 +1240,16 @@
nd->flags |= LOOKUP_JUMPED;
*inode = path->dentry->d_inode;
return 0;
+
+need_lookup:
+ BUG_ON(nd->inode != parent->d_inode);
+
+ mutex_lock(&parent->d_inode->i_mutex);
+ dentry = __lookup_hash(name, parent, nd);
+ mutex_unlock(&parent->d_inode->i_mutex);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+ goto done;
}
static inline int may_lookup(struct nameidata *nd)