The patch titled
Subject: mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl
has been added to the -mm tree. Its filename is
mm-gup_benchmark-fix-unsigned-comparison-to-zero-in-__gup_benchmark_ioctl.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-gup_benchmark-fix-unsigned-comparison-to-zero-in-__gup_benchmark_ioctl.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-gup_benchmark-fix-unsigned-comparison-to-zero-in-__gup_benchmark_ioctl.patch
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------------------------------------------------------
From: YueHaibing <yuehaibing@xxxxxxxxxx>
Subject: mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl
get_user_pages_fast() will return negative value if no pages were pinned,
then be converted to a unsigned, which is compared to zero, giving the
wrong result.
Link: http://lkml.kernel.org/r/20180921095015.26088-1-yuehaibing@xxxxxxxxxx
Fixes: 09e35a4a1ca8 ("mm/gup_benchmark: handle gup failures")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/gup_benchmark.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/mm/gup_benchmark.c~mm-gup_benchmark-fix-unsigned-comparison-to-zero-in-__gup_benchmark_ioctl
+++ a/mm/gup_benchmark.c
@@ -19,7 +19,8 @@ static int __gup_benchmark_ioctl(unsigne
struct gup_benchmark *gup)
{
ktime_t start_time, end_time;
- unsigned long i, nr, nr_pages, addr, next;
+ unsigned long i, nr_pages, addr, next;
+ int nr;
struct page **pages;
nr_pages = gup->size / PAGE_SIZE;
_
Patches currently in -mm which might be from yuehaibing@xxxxxxxxxx are
mm-gup_benchmark-fix-unsigned-comparison-to-zero-in-__gup_benchmark_ioctl.patch
mm-swap-remove-duplicated-include-from-swapc.patch
