linux-kernel - [PATCH] Fix compilation warning for fs/ocfs2/xattr.c

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Date:	Tue, 14 Jul 2009 01:19:31 +0530
From:	Subrata Modak <subrata@...ux.vnet.ibm.com>
To:	ocfs2-devel@....oracle.com, Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <joel.becker@...cle.com>
Cc:	Sachin P Sant <sachinp@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Subrata Modak <subrata@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] Fix compilation warning for fs/ocfs2/xattr.c

Hi,

gcc 4.4.1 generates the following build warning on i386:

CC [M]  fs/ocfs2/xattr.o
fs/ocfs2/xattr.c: In function ‘ocfs2_xattr_block_get’:
fs/ocfs2/xattr.c:1055: warning: ‘block_off’ may be used uninitialized in this function

The following fix is based on a similar approach by David Howells
few days back: http://lkml.org/lkml/2009/7/9/109,

Signed-off-by: Subrata Modak<subrata@...ux.vnet.ibm.com>,
---

--- a/fs/ocfs2/xattr.c	2009-06-17 17:47:21.000000000 +0530
+++ b/fs/ocfs2/xattr.c	2009-07-14 01:02:22.000000000 +0530
@@ -1052,7 +1052,8 @@ static int ocfs2_xattr_block_get(struct 
 	struct ocfs2_xattr_block *xb;
 	struct ocfs2_xattr_value_root *xv;
 	size_t size;
-	int ret = -ENODATA, name_offset, name_len, block_off, i;
+	int ret = -ENODATA, name_offset, name_len, i;
+	int uninitialized_var(block_off);
 
 	xs->bucket = ocfs2_xattr_bucket_new(inode);
 	if (!xs->bucket) {

---
Regards--
Subrata

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