aoe: replace kmalloc and then memcpy with kmemdup

Signed-off-by: Mihnea Dobrescu-Balaur <[e-mail]>
Cc: Ed Cashin <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/block/aoe/aoechr.c

···
 		return;
 	}
 
-	mp = kmalloc(n, GFP_ATOMIC);
+	mp = kmemdup(msg, n, GFP_ATOMIC);
 	if (mp == NULL) {
 		printk(KERN_ERR "aoe: allocation failure, len=%ld\n", n);
 		goto bail;
 	}
 
-	memcpy(mp, msg, n);
 	em->msg = mp;
 	em->flags |= EMFL_VALID;
 	em->len = n;