[PATCH] staging: zsmalloc: fix uninit'ed variable warning

From: Seth Jennings <sjenning@linux.vnet.ibm.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>,
	Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH] staging: zsmalloc: fix uninit'ed variable warning
Date: Wed, 13 Jun 2012 16:03:42 -0500	[thread overview]
Message-ID: <1339621422-8449-1-git-send-email-sjenning@linux.vnet.ibm.com> (raw)

This patch fixes an uninitialized variable warning in
alloc_zspage().  It also fixes the secondary issue of
prev_page leaving scope on each loop iteration.  The only
reason this ever worked was because prev_page was occupying
the same space on the stack on each iteration.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
---
 drivers/staging/zsmalloc/zsmalloc-main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c
index fb54a9b..4af3dd6 100644
--- a/drivers/staging/zsmalloc/zsmalloc-main.c
+++ b/drivers/staging/zsmalloc/zsmalloc-main.c
@@ -400,7 +400,7 @@ static void init_zspage(struct page *first_page, struct size_class *class)
 static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
 {
 	int i, error;
-	struct page *first_page = NULL;
+	struct page *first_page = NULL, *uninitialized_var(prev_page);
 
 	/*
 	 * Allocate individual pages and link them together as:
@@ -415,7 +415,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags)
 	 */
 	error = -ENOMEM;
 	for (i = 0; i < class->pages_per_zspage; i++) {
-		struct page *page, *prev_page;
+		struct page *page;
 
 		page = alloc_page(flags);
 		if (!page)
-- 
1.7.9.5

