linux-kernel - [PATCH 06/16] vfs: do_last(): make ENOENT exit RCU safe

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Date:	Mon, 21 May 2012 17:30:10 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	viro@...IV.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	hch@...radead.org, torvalds@...ux-foundation.org, mszeredi@...e.cz
Subject: [PATCH 06/16] vfs: do_last(): make ENOENT exit RCU safe

From: Miklos Szeredi <mszeredi@...e.cz>

This will allow this code to be used in RCU mode.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
 fs/namei.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 67bddd6..3f4b286 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2363,8 +2363,10 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 	BUG_ON(nd->flags & LOOKUP_RCU);
 	inode = path->dentry->d_inode;
 	error = -ENOENT;
-	if (!inode)
-		goto exit_dput;
+	if (!inode) {
+		path_to_nameidata(path, nd);
+		goto exit;
+	}
 
 	if (should_follow_link(inode, !symlink_ok)) {
 		if (nd->flags & LOOKUP_RCU) {
-- 
1.7.7

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