linux-kernel - Re: [PATCH 1/3] kbuild: Make old-atomics and missing-syscalls phony targets

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Date:   Wed, 24 Feb 2021 09:43:23 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] kbuild: Make old-atomics and missing-syscalls phony targets

On Wed, Feb 24, 2021 at 3:14 AM Rob Herring <robh@...nel.org> wrote:
>
> The old-atomics and missing-syscalls targets are not files, so they
> should be marked as PHONY.
>
> Cc: Masahiro Yamada <masahiroy@...nel.org>
> Cc: Michal Marek <michal.lkml@...kovi.net>
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
>  Kbuild | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/Kbuild b/Kbuild
> index fa441b98c9f6..032157c3ffd2 100644
> --- a/Kbuild
> +++ b/Kbuild
> @@ -44,6 +44,7 @@ always-y += missing-syscalls
>  quiet_cmd_syscalls = CALL    $<
>        cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
>
> +PHONY += missing-syscalls
>  missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
>         $(call cmd,syscalls)
>
> @@ -55,5 +56,6 @@ always-y += old-atomics
>  quiet_cmd_atomics = CALL    $<
>        cmd_atomics = $(CONFIG_SHELL) $<
>
> +PHONY += old-atomics


I do not think this is the right fix.

always-y (specified a few lines above) adds $(obj)/ prefix,
and is not supposed to work with PHONY.


It is wrong to blindly eliminate
the errors detected by your 3/3



>  old-atomics: scripts/atomic/check-atomics.sh FORCE
>         $(call cmd,atomics)
> --
> 2.27.0
>


-- 
Best Regards
Masahiro Yamada