linux-kernel - [PATCH 3/3] mm, nobootmem: do memset() after memblock

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Date:	Tue, 19 Mar 2013 14:16:01 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Yinghai Lu <yinghai@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Jiang Liu <liuj97@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 3/3] mm, nobootmem: do memset() after memblock_reserve()

Currently, we do memset() before reserving the area.
This may not cause any problem, but it is somewhat weird.
So change execution order.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 589c673..f11ec1c 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -46,8 +46,8 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
 		return NULL;
 
 	ptr = phys_to_virt(addr);
-	memset(ptr, 0, size);
 	memblock_reserve(addr, size);
+	memset(ptr, 0, size);
 	/*
 	 * The min_count is set to 0 so that bootmem allocated blocks
 	 * are never reported as leaks.
-- 
1.7.9.5

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