linux-kernel - Re: [PATCH] selftests/riscv: fix potential build failure during the "emit

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Date:   Thu, 13 Jul 2023 13:51:01 +0200
From:   Alexandre Ghiti <alex@...ti.fr>
To:     John Hubbard <jhubbard@...dia.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Albert Ou <aou@...s.berkeley.edu>,
        Alexandre Ghiti <alexghiti@...osinc.com>,
        Anders Roxell <anders.roxell@...aro.org>,
        Andrew Jones <ajones@...tanamicro.com>,
        Andy Chiu <andy.chiu@...ive.com>,
        Evan Green <evan@...osinc.com>,
        Hugh Dickins <hughd@...gle.com>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Qinglin Pan <panqinglin2020@...as.ac.cn>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        linux-riscv@...ts.infradead.org, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] selftests/riscv: fix potential build failure during the
 "emit_tests" step

Hi John,


On 12/07/2023 21:35, John Hubbard wrote:
> The riscv selftests (which were modeled after the arm64 selftests) are
> improperly declaring the "emit_tests" target to depend upon the "all"
> target. This approach, when combined with commit 9fc96c7c19df
> ("selftests: error out if kernel header files are not yet built"), has
> caused build failures [1] on arm64, and is likely to cause similar
> failures for riscv.
>
> To fix this, simply remove the unnecessary "all" dependency from the
> emit_tests target. The dependency is still effectively honored, because
> again, invocation is via "install", which also depends upon "all".
>
> An alternative approach would be to harden the emit_tests target so that
> it can depend upon "all", but that's a lot more complicated and hard to
> get right, and doesn't seem worth it, especially given that emit_tests
> should probably not be overridden at all.
>
> [1] https://lore.kernel.org/20230710-kselftest-fix-arm64-v1-1-48e872844f25@kernel.org
>
> Fixes: 9fc96c7c19df ("selftests: error out if kernel header files are not yet built")
> Signed-off-by: John Hubbard <jhubbard@...dia.com>
> ---
>
> Andrew,
>
> With this, and with my arm64 fix [2] that you've already put into
> mm-unstable, you should be able to safely drop commit 819187ab8741
> ("selftests: fix arm64 test installation").
>
> [2] https://lore.kernel.org/20230711005629.2547838-1-jhubbard@nvidia.com
>
> thanks,
> John Hubbard
>
>
>   tools/testing/selftests/riscv/Makefile | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/riscv/Makefile b/tools/testing/selftests/riscv/Makefile
> index 9dd629cc86aa..f4b3d5c9af5b 100644
> --- a/tools/testing/selftests/riscv/Makefile
> +++ b/tools/testing/selftests/riscv/Makefile
> @@ -43,7 +43,7 @@ run_tests: all
>   	done
>   
>   # Avoid any output on non riscv on emit_tests
> -emit_tests: all
> +emit_tests:
>   	@for DIR in $(RISCV_SUBTARGETS); do				\
>   		BUILD_TARGET=$(OUTPUT)/$$DIR;			\
>   		$(MAKE) OUTPUT=$$BUILD_TARGET -C $$DIR $@;		\
>
> base-commit: 3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c
> prerequisite-patch-id: 37c92f7425689ff069fb83996a25cd98e78d7242


Perfect timing, I have just encountered this failure this morning:

make[5]: *** [../../lib.mk:81: kernel_header_files] Error 1

that your patch fixed :) So you can add:

Tested-by: Alexandre Ghiti <alexghiti@...osinc.com>

Thank you!

Alex