linux-kernel - [PATCH] x86: do not reserve brk for DMI if it's not going to be used

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Message-Id: <1265758732-19320-1-git-send-email-cascardo@holoscopio.com>
Date:	Tue,  9 Feb 2010 21:38:45 -0200
From:	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
To:	linux-kernel@...r.kernel.org
Cc:	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Yinghai Lu <yinghai@...nel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH] x86: do not reserve brk for DMI if it's not going to be used

This will save 65536 bytes from memory when loading linux, which is good
for embedded systems.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>
---
 arch/x86/kernel/setup.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 3499b4f..cb42109 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -121,7 +121,9 @@
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
 
+#ifdef CONFIG_DMI
 RESERVE_BRK(dmi_alloc, 65536);
+#endif
 
 unsigned int boot_cpu_id __read_mostly;
 
-- 
1.6.6.1

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