linux-kernel - [PATCH 1/2] x86, numa, emu: move size calculation into if block

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Date:	Wed, 02 Mar 2011 17:25:06 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tejun Heo <tj@...nel.org>,
	David Rientjes <rientjes@...gle.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] x86, numa, emu: move size calculation into if block



don't need to assign them that early.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/mm/numa_64.c        |   11 +++++------
 arch/x86/mm/numa_emulation.c |    3 ++-
 2 files changed, 7 insertions(+), 7 deletions(-)

Index: linux-2.6/arch/x86/mm/numa_64.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/numa_64.c
+++ linux-2.6/arch/x86/mm/numa_64.c
@@ -390,13 +390,12 @@ static void __init numa_nodemask_from_me
  */
 void __init numa_reset_distance(void)
 {
-	size_t size = numa_distance_cnt * numa_distance_cnt * sizeof(numa_distance[0]);
-
 	/* numa_distance could be 1LU marking allocation failure, test cnt */
-	if (numa_distance_cnt)
-		memblock_x86_free_range(__pa(numa_distance),
-					__pa(numa_distance) + size);
-	numa_distance_cnt = 0;
+	if (numa_distance_cnt) {
+		size_t size = numa_distance_cnt * numa_distance_cnt * sizeof(numa_distance[0]);
+		memblock_x86_free_range(__pa(numa_distance), __pa(numa_distance) + size);
+		numa_distance_cnt = 0;
+	}
 	numa_distance = NULL;	/* enable table creation */
 }
 
Index: linux-2.6/arch/x86/mm/numa_emulation.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/numa_emulation.c
+++ linux-2.6/arch/x86/mm/numa_emulation.c
@@ -300,7 +300,7 @@ void __init numa_emulation(struct numa_m
 	static struct numa_meminfo pi __initdata;
 	const u64 max_addr = max_pfn << PAGE_SHIFT;
 	u8 *phys_dist = NULL;
-	size_t phys_size = numa_dist_cnt * numa_dist_cnt * sizeof(phys_dist[0]);
+	size_t phys_size = 0;
 	int i, j, ret;
 
 	if (!emu_cmdline)
@@ -341,6 +341,7 @@ void __init numa_emulation(struct numa_m
 	if (numa_dist_cnt) {
 		u64 phys;
 
+		phys_size = numa_dist_cnt * numa_dist_cnt * sizeof(phys_dist[0]);
 		phys = memblock_find_in_range(0,
 					      (u64)max_pfn_mapped << PAGE_SHIFT,
 					      phys_size, PAGE_SIZE);
--
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