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authorYueHaibing <yuehaibing@huawei.com>2018-10-05 15:51:44 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-05 16:32:04 -0700
commit51896864579d5a3349740847083f4db5c6487164 (patch)
tree7db76ed2366fceaa24eb69e4ff38319588f0751a /ipc/util.h
parentmm, thp: fix mlocking THP page with migration enabled (diff)
downloadlinux-dev-51896864579d5a3349740847083f4db5c6487164.tar.xz
linux-dev-51896864579d5a3349740847083f4db5c6487164.zip
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@huawei.com Fixes: 09e35a4a1ca8 ("mm/gup_benchmark: handle gup failures") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'ipc/util.h')
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