linux-kernel - [PATCH -tip] kmemcheck: use set_memory_4k() on x86

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Message-ID: <20081005172230.GA24825@localhost.localdomain>
Date:	Sun, 5 Oct 2008 19:22:30 +0200
From:	Vegard Nossum <vegard.nossum@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Pekka Enberg <penberg@...helsinki.fi>, linux-kernel@...r.kernel.org
Subject: [PATCH -tip] kmemcheck: use set_memory_4k() on x86_64 only

>From 5bce9b1674e84ff36ba8f5a390b2ad30cd42b29a Mon Sep 17 00:00:00 2001
From: Vegard Nossum <vegard.nossum@...il.com>
Date: Wed, 1 Oct 2008 18:36:42 +0200
Subject: [PATCH] kmemcheck: use set_memory_4k() on x86_64 only

x86_32 already disables PSE capabilities and is fine. We need this to
avoid the BUG in cache-flushing SMP call.

Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
---
 arch/x86/mm/kmemcheck/kmemcheck.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/mm/kmemcheck/kmemcheck.c b/arch/x86/mm/kmemcheck/kmemcheck.c
index 5a08a70..d649aa7 100644
--- a/arch/x86/mm/kmemcheck/kmemcheck.c
+++ b/arch/x86/mm/kmemcheck/kmemcheck.c
@@ -295,7 +295,9 @@ void kmemcheck_hide_pages(struct page *p, unsigned int n)
 {
 	unsigned int i;
 
+#ifdef CONFIG_X86_64
 	set_memory_4k((unsigned long) page_address(p), n);
+#endif
 
 	for (i = 0; i < n; ++i) {
 		unsigned long address;
-- 
1.5.5.1

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