linux-kernel - [PATCH] x86, mm: add parenthesis for TLB tracepoint size calculation

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Date:	Mon, 20 Jul 2015 16:01:53 -0700
From:	Dave Hansen <dave@...1.net>
To:	dave@...1.net
Cc:	dave.hansen@...ux.intel.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH] x86, mm: add parenthesis for TLB tracepoint size calculation


From: Dave Hansen <dave.hansen@...ux.intel.com>

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: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
Cc: stable@...r.kernel.org
---

 b/arch/x86/mm/tlb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/x86/mm/tlb.c~tlb-parens arch/x86/mm/tlb.c
--- a/arch/x86/mm/tlb.c~tlb-parens	2015-07-20 15:37:33.951272224 -0700
+++ b/arch/x86/mm/tlb.c	2015-07-20 15:37:33.955272406 -0700
@@ -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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