[patch]trivial: un-needed add-store operation wastes a few bytes

[nkalmala]

Un-needed add-store operation wastes a few bytes.
8 bytes wasted with -O2, on a ppc.

Signed-off-by: nkalmala <nkalmala@xxxxxxxxx>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b55bb35..bf2f6cf 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -853,7 +853,7 @@ again:
		pcp = &zone_pcp(zone, cpu)->pcp[cold];
		local_irq_save(flags);
		if (!pcp->count) {
-			pcp->count += rmqueue_bulk(zone, 0,
+			pcp->count = rmqueue_bulk(zone, 0,
						pcp->batch, &pcp->list);
			if (unlikely(!pcp->count))
				goto failed;


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