linux-kernel - Re: [PATCH] selftests: make use of GUP_TEST

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Date:   Thu, 9 Jun 2022 17:50:44 -0400
From:   Nico Pache <npache@...hat.com>
To:     Joel Savitz <jsavitz@...hat.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, Linux MM <linux-mm@...ck.org>,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH] selftests: make use of GUP_TEST_FILE macro

LGTM! Good catch :)

Acked-by: Nico Pache <npache@...hat.com>

On Thu, Jun 9, 2022 at 4:37 PM Joel Savitz <jsavitz@...hat.com> wrote:
>
> Commit 17de1e559cf1 ("selftests: clarify common error when running
> gup_test") had most of its hunks dropped due to a conflict with another
> patch accepted into Linux around the same time that implemented the same
> behavior as a subset of other changes.
>
> However, the remaining hunk defines the GUP_TEST_FILE macro without
> making use of it. This patch makes use of the macro in the two relevant
> places.
>
> Furthermore, the above mentioned commit's log message erroneously describes
> the changes that were dropped from the patch.
>
> This patch corrects the record.
>
> Fixes: 17de1e559cf1 ("selftests: clarify common error when running gup_test")
>
> Signed-off-by: Joel Savitz <jsavitz@...hat.com>
> ---
>  tools/testing/selftests/vm/gup_test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/vm/gup_test.c b/tools/testing/selftests/vm/gup_test.c
> index 6bb36ca71cb5..a309876d832f 100644
> --- a/tools/testing/selftests/vm/gup_test.c
> +++ b/tools/testing/selftests/vm/gup_test.c
> @@ -209,7 +209,7 @@ int main(int argc, char **argv)
>         if (write)
>                 gup.gup_flags |= FOLL_WRITE;
>
> -       gup_fd = open("/sys/kernel/debug/gup_test", O_RDWR);
> +       gup_fd = open(GUP_TEST_FILE, O_RDWR);
>         if (gup_fd == -1) {
>                 switch (errno) {
>                 case EACCES:
> @@ -224,7 +224,7 @@ int main(int argc, char **argv)
>                         printf("check if CONFIG_GUP_TEST is enabled in kernel config\n");
>                         break;
>                 default:
> -                       perror("failed to open /sys/kernel/debug/gup_test");
> +                       perror("failed to open " GUP_TEST_FILE);
>                         break;
>                 }
>                 exit(KSFT_SKIP);
> --
> 2.31.1
>