From: Christoph Hellwig <hch@infradead.org>
Date: Thu, 30 Oct 2008 06:21:10 +0000 (+1100)
Subject: [XFS] fix instant oops with tracing enabled
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3471394ba56f44761ce1c300f139478dbfb49d4a;p=linux-beck.git

[XFS] fix instant oops with tracing enabled

We can only read inode->i_count if the inode is actually there and not a
NULL pointer. This was introduced in one of the recent sync patches.

SGI-PV: 988255

SGI-Modid: xfs-linux-melb:xfs-kern:32315a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
---

diff --git a/fs/xfs/linux-2.6/xfs_vnode.c b/fs/xfs/linux-2.6/xfs_vnode.c
index dceb6dbaa2da..ac827d231490 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.c
+++ b/fs/xfs/linux-2.6/xfs_vnode.c
@@ -92,7 +92,7 @@ static inline int xfs_icount(struct xfs_inode *ip)
 {
 	struct inode *inode = VFS_I(ip);
 
-	if (!inode)
+	if (inode)
 		return atomic_read(&inode->i_count);
 	return -1;
 }