[3.19.y-ckt stable] Patch "x86/mm: Add parenthesis for TLB tracepoint size calculation" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    x86/mm: Add parenthesis for TLB tracepoint size calculation

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt6.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From a291191dd9b466521628d5bbe199d35470c74450 Mon Sep 17 00:00:00 2001
From: Dave Hansen <dave.hansen at linux.intel.com>
Date: Mon, 20 Jul 2015 16:01:53 -0700
Subject: x86/mm: Add parenthesis for TLB tracepoint size calculation

commit bbc03778b9954a2ec93baed63718e4df0192f130 upstream.

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 at linux.intel.com>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Linus Torvalds <torvalds at linux-foundation.org>
Cc: Peter Zijlstra <peterz at infradead.org>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: dave at sr71.net
Link: http://lkml.kernel.org/r/20150720230153.9E834081@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo at kernel.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 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 ee61c36..020bcc7 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -120,7 +120,7 @@ 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);
--
1.9.1