linux-ext4 - [PATCH 1/4] ext4: remove unsafe and unnecessary memset()

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Message-Id: <1354257706-6582-1-git-send-email-yan@linux.vnet.ibm.com>
Date:	Fri, 30 Nov 2012 14:41:43 +0800
From:	Guo Chao <yan@...ux.vnet.ibm.com>
To:	tytso@....edu
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH 1/4] ext4: remove unsafe and unnecessary memset()

We memset this page before checking whether it's valid. But we need
not memset zeroed page at all.

Signed-off-by: Guo Chao <yan@...ux.vnet.ibm.com>
---
 fs/ext4/super.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ad6cd8a..66a4e20 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3206,7 +3206,6 @@ int ext4_calculate_overhead(struct super_block *sb)
 	ext4_fsblk_t overhead = 0;
 	char *buf = (char *) get_zeroed_page(GFP_KERNEL);
 
-	memset(buf, 0, PAGE_SIZE);
 	if (!buf)
 		return -ENOMEM;
 
-- 
1.7.9.5

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