linux-kernel - [PATCH 14/25 -v2] get rid of inline asm for load

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Date:	Fri, 10 Aug 2007 16:12:26 -0300
From:	Glauber de Oliveira Costa <gcosta@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, rusty@...tcorp.com.au, ak@...e.de,
	mingo@...e.hu, chrisw@...s-sol.org, jeremy@...p.org,
	avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, lguest@...abs.org,
	glommer@...il.com, Glauber de Oliveira Costa <gcosta@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH 14/25 -v2] get rid of inline asm for load_cr3

Besides not elegant, it is now even forbidden, since it can
break paravirtualized guests. load_cr3 should call write_cr3()
instead.

Signed-off-by: Glauber de Oliveira Costa <gcosta@...hat.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 include/asm-x86_64/mmu_context.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/asm-x86_64/mmu_context.h b/include/asm-x86_64/mmu_context.h
index c8cdc1e..9592698 100644
--- a/include/asm-x86_64/mmu_context.h
+++ b/include/asm-x86_64/mmu_context.h
@@ -25,7 +25,7 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 
 static inline void load_cr3(pgd_t *pgd)
 {
-	asm volatile("movq %0,%%cr3" :: "r" (__pa(pgd)) : "memory");
+	write_cr3(__pa(pgd));
 }
 
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 
-- 
1.4.4.2

-
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