From: Yinghai Lu <Yinghai.Lu@Sun.COM>
Date: Wed, 30 Jan 2008 12:32:36 +0000 (+0100)
Subject: x86: not clear empty_zero_page again
X-Git-Tag: v3.12-rc1~24034^2~433
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=48ddb154cf55fb1e292af49c270b950ef2c6ef32;p=kernel%2Fkernel-generic.git

x86: not clear empty_zero_page again

empty_zero_page is in .bss section, and it is cleared in clear_bss by
x86_64_start_kernel(). So don't clear that again in mem_init

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 15e05a0..6c3f6eb 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -495,8 +495,7 @@ void __init mem_init(void)
 
 	pci_iommu_alloc();
 
-	/* clear the zero-page */
-	memset(empty_zero_page, 0, PAGE_SIZE);
+	/* clear_bss() already clear the empty_zero_page */
 
 	reservedpages = 0;