[PATCH 4.1 089/123] x86/mm: Add parenthesis for TLB tracepoint size calculation

From: Greg Kroah-Hartman
Date: Sat Aug 08 2015 - 18:30:45 EST

4.1-stable review patch. If anyone has any objections, please let me know.


From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: dave@xxxxxxxx
Link: http://lkml.kernel.org/r/20150720230153.9E834081@xxxxxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- 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) {

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