linux-kernel - [tip:x86/urgent] x86/mm: Add parenthesis for TLB tracepoint size calculation

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Date:	Tue, 21 Jul 2015 02:36:36 -0700
From:	tip-bot for Dave Hansen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	mingo@...nel.org, dave.hansen@...ux.intel.com,
	torvalds@...ux-foundation.org, hpa@...or.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	akpm@...ux-foundation.org, stable@...r.kernel.org
Subject: [tip:x86/urgent] x86/mm:
  Add parenthesis for TLB tracepoint size calculation

Commit-ID:  bbc03778b9954a2ec93baed63718e4df0192f130
Gitweb:     http://git.kernel.org/tip/bbc03778b9954a2ec93baed63718e4df0192f130
Author:     Dave Hansen <dave.hansen@...ux.intel.com>
AuthorDate: Mon, 20 Jul 2015 16:01:53 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 21 Jul 2015 07:45:50 +0200

x86/mm: Add parenthesis for TLB tracepoint size calculation

flush_tlb_info->flush_start/end are both normal virtual
addresses.  When calculating 'nr_pages' (only used for the
tracepoint), I neglected to put parenthesis in.

Thanks to David Koufaty for pointing this out.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: dave@...1.net
Cc: <stable@...r.kernel.org>
Link: http://lkml.kernel.org/r/20150720230153.9E834081@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/mm/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 3250f23..90b924a 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -117,7 +117,7 @@ static void flush_tlb_func(void *info)
 		} else {
 			unsigned long addr;
 			unsigned long nr_pages =
-				f->flush_end - f->flush_start / PAGE_SIZE;
+				(f->flush_end - f->flush_start) / PAGE_SIZE;
 			addr = f->flush_start;
 			while (addr < f->flush_end) {
 				__flush_tlb_single(addr);
--
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