linux-kernel - [PATCH 2/2] mm, nobootmem: do memset() after memblock

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Message-Id: <1366619113-28017-2-git-send-email-iamjoonsoo.kim@lge.com>
Date:	Mon, 22 Apr 2013 17:25:13 +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 2/2] 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 a31be7a..bdd3fa2 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -45,9 +45,9 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
 	if (!addr)
 		return NULL;
 
+	memblock_reserve(addr, size);
 	ptr = phys_to_virt(addr);
 	memset(ptr, 0, size);
-	memblock_reserve(addr, 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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