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

[YueHaibing]

Use kmemdup rather than duplicating its implementation

Signed-off-by: YueHaibing <yuehaib...@huawei.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),