mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare()

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Link: http://lkml.kernel.org/r/bae25b04-2ce2-7137-a71c-50d7b4f06431@users.sourceforge.netSigned-off-by: Markus Elfring <elfring@users.sourceforge.net>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjenning@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/zswap.c

@@ -371,10 +371,9 @@ static int zswap_dstmem_prepare(unsigned int cpu)
 	u8 *dst;
 
 	dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu));
-	if (!dst) {
-		pr_err("can't allocate compressor buffer\n");
+	if (!dst)
 		return -ENOMEM;
-	}
+
 	per_cpu(zswap_dstmem, cpu) = dst;
 	return 0;
 }