fs: omfs: use kmemdup() rather than kmalloc+memcpy

Issue identified with Coccinelle.

Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Acked-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: alexdewar

fs/omfs/inode.c

@@ -362,12 +362,11 @@ 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);