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From:   Punit Agrawal <punit.agrawal@bytedance.com>
To:     Punit Agrawal <punit.agrawal@bytedance.com>
Cc:     akpm@linux-foundation.org, shuah@kernel.org, adobriyan@gmail.com,
        linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-kselftest@vger.kernel.org
Subject: Re: [PATCH] selftests: proc: Fix proc-empty-vm build error on non
 x86_64
References: <20221109110621.1791999-1-punit.agrawal@bytedance.com>
Date:   Wed, 09 Nov 2022 22:07:10 +0000
In-Reply-To: <20221109110621.1791999-1-punit.agrawal@bytedance.com> (Punit
        Agrawal's message of "Wed, 9 Nov 2022 11:06:21 +0000")
Message-ID: <87fser235d.fsf@stealth>
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Punit Agrawal <punit.agrawal@bytedance.com> writes:

> The proc-empty-vm test is implemented for x86_64 and fails to build
> for other architectures. Rather then emitting a compiler error it
> would be preferable to only build the test on supported architectures.
>
> Mark proc-empty-vm as a test for x86_64 and customise to the Makefile
> to build it only when building for this target architecture.
>
> Fixes: 5bc73bb3451b ("proc: test how it holds up with mapping'less process")
> Signed-off-by: Punit Agrawal <punit.agrawal@bytedance.com>
> ---
>  tools/testing/selftests/proc/Makefile | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/proc/Makefile b/tools/testing/selftests/proc/Makefile
> index cd95369254c0..6b31439902af 100644
> --- a/tools/testing/selftests/proc/Makefile
> +++ b/tools/testing/selftests/proc/Makefile
> @@ -1,14 +1,18 @@
>  # SPDX-License-Identifier: GPL-2.0-only
> +
> +# When ARCH not overridden for crosscompiling, lookup machine
> +ARCH ?= $(shell uname -m 2>/dev/null || echo not)
> +
>  CFLAGS += -Wall -O2 -Wno-unused-function
>  CFLAGS += -D_GNU_SOURCE
>  LDFLAGS += -pthread
>  
> -TEST_GEN_PROGS :=
> +TEST_GEN_PROGS_x86_64 += proc-empty-vm
> +
>  TEST_GEN_PROGS += fd-001-lookup
>  TEST_GEN_PROGS += fd-002-posix-eq
>  TEST_GEN_PROGS += fd-003-kthread
>  TEST_GEN_PROGS += proc-loadavg-001
> -TEST_GEN_PROGS += proc-empty-vm
>  TEST_GEN_PROGS += proc-pid-vm
>  TEST_GEN_PROGS += proc-self-map-files-001
>  TEST_GEN_PROGS += proc-self-map-files-002

I noticed that a hunk has gone missing from the patch. Please ignore
this version - I'll post an updated one shortly.