From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
We calculate nr_pages with f->flush_end and f->flush_start, both
of which are virtual addresses. However, we only divide
f->flush_start by PAGE_SIZE, and missed f->flush_end. This patch
adds some parenthesis to catch f->flush_end as well.
nr_pages is only used for a trace point. This should not have
any functional impact other than keeping the trace point from
spitting out garbage for the flush length.
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
b/arch/x86/mm/tlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/x86/mm/tlb.c~x86-tlb-fix-tracepoint-data arch/x86/mm/tlb.c
--- a/arch/x86/mm/tlb.c~x86-tlb-fix-tracepoint-data 2014-12-08 10:58:22.245782512 -0800
+++ b/arch/x86/mm/tlb.c 2014-12-08 10:58:22.248782647 -0800
@@ -129,7 +129,7 @@ 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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