linux-kernel - [PATCH] omfs: Use kmemdup instead of duplicating its function

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Message-Id: <20181206090210.39624-1-wen.yang99@zte.com.cn>
Date:   Thu, 6 Dec 2018 17:02:10 +0800
From:   Wen Yang <wen.yang99@....com.cn>
To:     Bob Copeland <me@...copeland.com>
Cc:     linux-karma-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, zhong.weidong@....com.cn,
        Wen Yang <wen.yang99@....com.cn>
Subject: [PATCH] omfs: Use kmemdup instead of duplicating its function

kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.

This issue was detected with the help of coccinelle.

Signed-off-by: Wen Yang <wen.yang99@....com.cn>
CC: Bob Copeland <me@...copeland.com>
CC: linux-karma-devel@...ts.sourceforge.net
CC: linux-kernel@...r.kernel.org
---
 fs/omfs/inode.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index e5258fefcd2b..195c6baa3c8e 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -363,12 +363,11 @@ static int omfs_get_imap(struct super_block *sb)
 		bh = sb_bread(sb, block++);
 		if (!bh)
 			goto nomem_free;
-		*ptr = kmalloc(sb->s_blocksize, GFP_KERNEL);
+		*ptr = kmemdup(bh->b_data, sb->s_blocksize, GFP_KERNEL);
 		if (!*ptr) {
 			brelse(bh);
 			goto nomem_free;
 		}
-		memcpy(*ptr, bh->b_data, sb->s_blocksize);
 		if (count < sb->s_blocksize)
 			memset((void *)*ptr + count, 0xff,
 				sb->s_blocksize - count);
-- 
2.19.1