linux-kernel - [tip:x86/mm] x86: reserve exact size of mptable

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Message-ID: <tip-f62432395ec54e93f113091bcb2e2017eeed7683@git.kernel.org>
Date:	Wed, 4 Mar 2009 20:01:00 GMT
From:	Yinghai Lu <yinghai@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	yinghai@...nel.org, akpm@...ux-foundation.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:x86/mm] x86: reserve exact size of mptable

Commit-ID:  f62432395ec54e93f113091bcb2e2017eeed7683
Gitweb:     http://git.kernel.org/tip/f62432395ec54e93f113091bcb2e2017eeed7683
Author:     "Yinghai Lu" <yinghai@...nel.org>
AuthorDate: Wed, 4 Mar 2009 01:25:54 -0800
Commit:     Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 4 Mar 2009 20:55:04 +0100

x86: reserve exact size of mptable

Impact: save a bit of RAM

Get the exact size for the reserve_bootmem() call.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
LKML-Reference: <49AE4922.605@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/mpparse.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index ae9060c..e819240 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -716,10 +716,10 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
 
 			if (!reserve)
 				return 1;
-			reserve_bootmem_generic(virt_to_phys(mpf), PAGE_SIZE,
+			reserve_bootmem_generic(virt_to_phys(mpf), sizeof(*mpf),
 					BOOTMEM_DEFAULT);
 			if (mpf->physptr) {
-				unsigned long size = PAGE_SIZE;
+				unsigned long size = get_mpc_size(mpf->physptr);
 #ifdef CONFIG_X86_32
 				/*
 				 * We cannot access to MPC table to compute
--
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