linux-kernel - Re: [PATCH v2 1/2] selftests/damon: suppress compiler warnings for huge_count_read

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Message-Id: <20220504001153.119485-1-sj@kernel.org>
Date:   Wed,  4 May 2022 00:11:53 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Yuanchu Xie <yuanchu@...gle.com>
Cc:     Shuah Khan <shuah@...nel.org>, Markus Boehme <markubo@...zon.de>,
        SeongJae Park <sj@...nel.org>, rientjes@...gle.com,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] selftests/damon: suppress compiler warnings for huge_count_read_write

Hi Yuanchu, thank you for this patch!

On Wed, 4 May 2022 00:03:57 +0000 Yuanchu Xie <yuanchu@...gle.com> wrote:

> The test case added in commit db7a347b26fe ("mm/damon/dbgfs:
> use '__GFP_NOWARN' for user-specified size buffer allocation")
> intentionally writes and reads with a large count to cause
> allocation failure and check for kernel warnings. We suppress
> the compiler warnings for these calls as they work as intended.
> 
> Signed-off-by: Yuanchu Xie <yuanchu@...gle.com>

Reviewed-by: SeongJae Park <sj@...nel.org>


Thanks,
SJ

[...]
> ---
>  tools/testing/selftests/damon/Makefile | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile
> index 0470c5f3e690..a300b4c5b373 100644
> --- a/tools/testing/selftests/damon/Makefile
> +++ b/tools/testing/selftests/damon/Makefile
> @@ -1,6 +1,9 @@
>  # SPDX-License-Identifier: GPL-2.0
>  # Makefile for damon selftests
>  
> +CFLAGS += -Wno-stringop-overread
> +CFLAGS += -Wno-stringop-overflow
> +
>  TEST_GEN_FILES += huge_count_read_write
>  
>  TEST_FILES = _chk_dependency.sh _debugfs_common.sh
> -- 
> 2.36.0.464.gb9c8b46e94-goog
>