linux-kernel - [PATCH] ocfs2: Use kmemdup rather than duplicating its implementation

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Date:	Sat, 12 Nov 2011 18:02:25 +0100
From:	Thomas Meyer <thomas@...3r.de>
To:	ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org
Subject: [PATCH] ocfs2: Use kmemdup rather than duplicating its
 implementation

Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@...3r.de>
---

diff -u -p a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
--- a/fs/ocfs2/localalloc.c 2011-11-07 19:38:23.787162856 +0100
+++ b/fs/ocfs2/localalloc.c 2011-11-08 10:34:40.993095086 +0100
@@ -434,12 +434,11 @@ void ocfs2_shutdown_local_alloc(struct o
 	bh = osb->local_alloc_bh;
 	alloc = (struct ocfs2_dinode *) bh->b_data;
 
-	alloc_copy = kmalloc(bh->b_size, GFP_NOFS);
+	alloc_copy = kmemdup(alloc, bh->b_size, GFP_NOFS);
 	if (!alloc_copy) {
 		status = -ENOMEM;
 		goto out_commit;
 	}
-	memcpy(alloc_copy, alloc, bh->b_size);
 
 	status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode),
 					 bh, OCFS2_JOURNAL_ACCESS_WRITE);
@@ -1249,13 +1248,12 @@ static int ocfs2_local_alloc_slide_windo
 	 * local alloc shutdown won't try to double free main bitmap
 	 * bits. Make a copy so the sync function knows which bits to
 	 * free. */
-	alloc_copy = kmalloc(osb->local_alloc_bh->b_size, GFP_NOFS);
+	alloc_copy = kmemdup(alloc, osb->local_alloc_bh->b_size, GFP_NOFS);
 	if (!alloc_copy) {
 		status = -ENOMEM;
 		mlog_errno(status);
 		goto bail;
 	}
-	memcpy(alloc_copy, alloc, osb->local_alloc_bh->b_size);
 
 	status = ocfs2_journal_access_di(handle,
 					 INODE_CACHE(local_alloc_inode),



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