From: Alex Shi <alex.shi@intel.com>
Date: Fri, 20 Jul 2012 01:18:23 +0000 (+0800)
Subject: x86/tlb: Fix build warning and crash when building for !SMP
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7efa1c87963d23cc57ba40c07316d3e28cc75a3a;p=linux-beck.git

x86/tlb: Fix build warning and crash when building for !SMP

The incompatible parameter of flush_tlb_mm_range cause build warning.
Fix it by correct parameter.

Ingo Molnar found that this could also cause a user space crash.

Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Alex Shi <alex.shi@intel.com>
Link: http://lkml.kernel.org/r/1342747103-19765-1-git-send-email-alex.shi@intel.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index b5a27bd77669..74a44333545a 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -105,10 +105,10 @@ static inline void flush_tlb_range(struct vm_area_struct *vma,
 		__flush_tlb();
 }
 
-static inline void flush_tlb_mm_range(struct vm_area_struct *vma,
+static inline void flush_tlb_mm_range(struct mm_struct *mm,
 	   unsigned long start, unsigned long end, unsigned long vmflag)
 {
-	if (vma->vm_mm == current->active_mm)
+	if (mm == current->active_mm)
 		__flush_tlb();
 }