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

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Date:   Thu, 9 Jun 2022 15:12:51 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Joel Savitz <jsavitz@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, Nico Pache <npache@...hat.com>,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests: make use of GUP_TEST_FILE macro

On 6/9/22 2:32 PM, Joel Savitz 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);
> 

Thank you for finding and fixing the problem.

Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah