linux-kernel - Re: [PATCH v2] selftests/mm/cow: Modify the incorrect checking parameters

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Message-ID: <79f364d7-b94f-450b-97ef-c7539c9671ce@arm.com>
Date: Mon, 13 Jan 2025 11:25:44 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Hao Ge <hao.ge@...ux.dev>, akpm@...ux-foundation.org, shuah@...nel.org
Cc: sj@...nel.org, linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, Hao Ge <gehao@...inos.cn>
Subject: Re: [PATCH v2] selftests/mm/cow: Modify the incorrect checking
 parameters

A small nit.

Please always send a new patch version separately as a new email
thread instead - not part of an ongoing discussion.

On 1/13/25 10:39, Hao Ge wrote:
> From: Hao Ge <gehao@...inos.cn>
> 
> In the cow.c,some error handle have passed incorrect
> parameters. It should be "smem", but it was mistakenly
> written as "mem".
> 
> Let's fix it.
> 
> Fixes: f8664f3c4a08 ("selftests/vm: cow: basic COW tests for non-anonymous pages")
> Signed-off-by: Hao Ge <gehao@...inos.cn>
> ---
> v2: Anshuman pointed out that the error is not limited to the run_with_memfd_hugetlb function;
>     there are other places where it occurs as well.
>     Therefore, let's fix it all together.
>     Similarly, Update the Fix tag to be accurate.

LGTM

Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>

> ---
>  tools/testing/selftests/mm/cow.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c
> index 32c6ccc2a6be..c52c93996ba1 100644
> --- a/tools/testing/selftests/mm/cow.c
> +++ b/tools/testing/selftests/mm/cow.c
> @@ -1482,7 +1482,7 @@ static void run_with_zeropage(non_anon_test_fn fn, const char *desc)
>  	}
>  
>  	smem = mmap(NULL, pagesize, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
> -	if (mem == MAP_FAILED) {
> +	if (smem == MAP_FAILED) {
>  		ksft_test_result_fail("mmap() failed\n");
>  		goto munmap;
>  	}
> @@ -1583,7 +1583,7 @@ static void run_with_memfd(non_anon_test_fn fn, const char *desc)
>  		goto close;
>  	}
>  	smem = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
> -	if (mem == MAP_FAILED) {
> +	if (smem == MAP_FAILED) {
>  		ksft_test_result_fail("mmap() failed\n");
>  		goto munmap;
>  	}
> @@ -1634,7 +1634,7 @@ static void run_with_tmpfile(non_anon_test_fn fn, const char *desc)
>  		goto close;
>  	}
>  	smem = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
> -	if (mem == MAP_FAILED) {
> +	if (smem == MAP_FAILED) {
>  		ksft_test_result_fail("mmap() failed\n");
>  		goto munmap;
>  	}
> @@ -1684,7 +1684,7 @@ static void run_with_memfd_hugetlb(non_anon_test_fn fn, const char *desc,
>  		goto close;
>  	}
>  	smem = mmap(NULL, hugetlbsize, PROT_READ, MAP_SHARED, fd, 0);
> -	if (mem == MAP_FAILED) {
> +	if (smem == MAP_FAILED) {
>  		ksft_test_result_fail("mmap() failed\n");
>  		goto munmap;
>  	}
> @@ -1696,7 +1696,7 @@ static void run_with_memfd_hugetlb(non_anon_test_fn fn, const char *desc,
>  	fn(mem, smem, hugetlbsize);
>  munmap:
>  	munmap(mem, hugetlbsize);
> -	if (mem != MAP_FAILED)
> +	if (smem != MAP_FAILED)
>  		munmap(smem, hugetlbsize);
>  close:
>  	close(fd);