From: Miklos Szeredi <mszeredi@suse.cz>
Date: Mon, 21 May 2012 15:30:08 +0000 (+0200)
Subject: vfs: do_last(): use inode variable
X-Git-Tag: v3.5-rc1~15^2~12
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=decf3400879d02d0eafedea52c7f208587be062a;p=users%2Fdwmw2%2Flinux.git

vfs: do_last(): use inode variable

Use helper variable instead of path->dentry->d_inode before complete_walk().
This will allow this code to be used in RCU mode.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namei.c b/fs/namei.c
index f6b31c94c1107..41445e7fd3398 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2358,15 +2358,17 @@ static struct file *do_last(struct nameidata *nd, struct path *path,
 	if (error)
 		nd->flags |= LOOKUP_JUMPED;
 
+	BUG_ON(nd->flags & LOOKUP_RCU);
+	inode = path->dentry->d_inode;
 	error = -ENOENT;
-	if (!path->dentry->d_inode)
+	if (!inode)
 		goto exit_dput;
 
-	if (path->dentry->d_inode->i_op->follow_link)
+	if (inode->i_op->follow_link)
 		return NULL;
 
 	path_to_nameidata(path, nd);
-	nd->inode = path->dentry->d_inode;
+	nd->inode = inode;
 	/* Why this, you ask?  _Now_ we might have grown LOOKUP_JUMPED... */
 	error = complete_walk(nd);
 	if (error)