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From:   Masahiro Yamada <masahiroy@kernel.org>
Date:   Wed, 24 Feb 2021 09:47:07 +0900
Message-ID: <CAK7LNARzTpczHuuHam5kHkaG1UhFE05knp5KeEcd5=Cv_EQEsw@mail.gmail.com>
Subject: Re: [PATCH 2/3] x86: Drop generated syscall headers from 'targets'
To:     Rob Herring <robh@kernel.org>
Cc:     Michal Marek <michal.lkml@markovi.net>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        X86 ML <x86@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Wed, Feb 24, 2021 at 3:14 AM Rob Herring <robh@kernel.org> wrote:
>
> Including the generated syscall headers in 'targets' is wrong because they
> are not built in $(obj)/ and the Makefile does its own path prefix and
> build rules.
>
> Cc: Andy Lutomirski <luto@kernel.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: x86@kernel.org
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: Masahiro Yamada <masahiroy@kernel.org>
> Cc: Michal Marek <michal.lkml@markovi.net>
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  arch/x86/entry/syscalls/Makefile | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/arch/x86/entry/syscalls/Makefile b/arch/x86/entry/syscalls/Makefile
> index 6fb9b57ed5ba..b0dcb7e41554 100644
> --- a/arch/x86/entry/syscalls/Makefile
> +++ b/arch/x86/entry/syscalls/Makefile
> @@ -62,8 +62,6 @@ syshdr-$(CONFIG_X86_64)               += unistd_32_ia32.h unistd_64_x32.h
>  syshdr-$(CONFIG_X86_64)                += syscalls_64.h
>  syshdr-$(CONFIG_XEN)           += xen-hypercalls.h
>
> -targets        += $(uapisyshdr-y) $(syshdr-y)
> -

This is also a wrong fix.

The correct fix exists in linux-next.

commit 865fa29f7dd1b6af8498fe08f19b4028c1c8a153
Author: Masahiro Yamada <masahiroy@kernel.org>
Date:   Mon Feb 15 09:48:22 2021 +0900

    arch: syscalls: add missing FORCE and fix 'targets' to make if_changed work


I will send a PR this week.


>  PHONY += all
>  all: $(addprefix $(uapi)/,$(uapisyshdr-y))
>  all: $(addprefix $(out)/,$(syshdr-y))
> --
> 2.27.0
>


-- 
Best Regards
Masahiro Yamada