linux-kernel - Re: [PATCH v2] sparc: allow sparc32 alias for archhelp

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Message-ID: <CAK7LNAQGqF-9Tw1ZQQUTcn23P8AKy8YQwVy1BJtc5eX-WEZkUw@mail.gmail.com>
Date:   Tue, 11 Apr 2023 08:45:38 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
        "David S. Miller" <davem@...emloft.net>,
        sparclinux@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2] sparc: allow sparc32 alias for archhelp

On Mon, Apr 10, 2023 at 10:13 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>
> Currently, entering
> $ make ARCH=sparc32 help
> prints the archhelp text for sparc64.
>
> Since "sparc32" is documented (Documentation/kbuild/kbuild.rst)
> to be a recognized alias for 32-bit sparc, also support that
> string in sparc's archhelp by allowing either ARCH=sparc or
> ARCH=sparc32 for sparc32 archhelp.
>
> Fixes: 5e53879008b9 ("sparc,sparc64: unify Makefile")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Sam Ravnborg <sam@...nborg.org>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: sparclinux@...r.kernel.org
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Acked-by: Sam Ravnborg <sam@...nborg.org>
> Cc: Masahiro Yamada <masahiroy@...nel.org>
> ---
> v2: rebase/resend; add Masahiro to Cc: list
>
>  arch/sparc/Makefile |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff -- a/arch/sparc/Makefile b/arch/sparc/Makefile
> --- a/arch/sparc/Makefile
> +++ b/arch/sparc/Makefile
> @@ -83,7 +83,7 @@ vdso_install:
>  KBUILD_IMAGE := $(boot)/zImage
>
>  # Don't use tabs in echo arguments.
> -ifeq ($(ARCH),sparc)
> +ifeq ($(ARCH),$(filter $(ARCH),sparc sparc32))
>  define archhelp
>    echo  '* image        - kernel image ($(boot)/image)'


BTW, this is strange.


The asterisk means it is built by 'all'.


But, I only see the following in this Makefile.


# Default target
all: zImage





Seeing arch/sparc/boot/Makefile,
it is true $(boot)/image is generated
as a side-effect of zImage, but it it true for
both 32-bit and 64-bit.

I think it is even better to rewrite archhelp
to unify the 32/64 bits.





>    echo  '* zImage       - stripped kernel image ($(boot)/zImage)'



-- 
Best Regards
Masahiro Yamada