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

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Date:   Thu, 29 Nov 2018 02:01:14 +0000
From:   YueHaibing <yuehaibing@...wei.com>
To:     Mark Fasheh <mark@...heh.com>, Joel Becker <jlbec@...lplan.org>
CC:     YueHaibing <yuehaibing@...wei.com>, <ocfs2-devel@....oracle.com>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] ocfs2: Use kmemdup rather than duplicating its implementation

Use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <yuehaibing@...wei.com>
---
 fs/ocfs2/localalloc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 308f05b..3572204 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -433,12 +433,11 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
 	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);
@@ -1281,13 +1280,12 @@ static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
 	 * 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),