linux-kernel - [tip:x86/mm] x86/tlb: Fix build warning and crash when building for !SMP

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Message-ID: <tip-7efa1c87963d23cc57ba40c07316d3e28cc75a3a@git.kernel.org>
Date:	Fri, 20 Jul 2012 15:34:43 -0700
From:	tip-bot for Alex Shi <alex.shi@...el.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	penguin-kernel@...ove.SAKURA.ne.jp, alex.shi@...el.com,
	tglx@...utronix.de
Subject: [tip:x86/mm] x86/tlb:
  Fix build warning and crash when building for !SMP

Commit-ID:  7efa1c87963d23cc57ba40c07316d3e28cc75a3a
Gitweb:     http://git.kernel.org/tip/7efa1c87963d23cc57ba40c07316d3e28cc75a3a
Author:     Alex Shi <alex.shi@...el.com>
AuthorDate: Fri, 20 Jul 2012 09:18:23 +0800
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Fri, 20 Jul 2012 15:01:48 -0700

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@...ove.SAKURA.ne.jp>
Reported-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Alex Shi <alex.shi@...el.com>
Link: http://lkml.kernel.org/r/1342747103-19765-1-git-send-email-alex.shi@intel.com
Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/include/asm/tlbflush.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index b5a27bd..74a4433 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();
 }
 
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