linux-kernel - Re: [PATCH v2] arch: vdso: remove if-conditionals of $(c-gettimeofday-y)

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Date:   Tue, 3 Aug 2021 17:19:26 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        linux-kernel@...r.kernel.org, Will Deacon <will@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Palmer Dabbelt <palmer@...belt.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Guo Ren <guoren@...nel.org>, linux-mips@...r.kernel.org,
        Paul Mackerras <paulus@...ba.org>, linux-csky@...r.kernel.org,
        linux-riscv@...ts.infradead.org, Albert Ou <aou@...s.berkeley.edu>,
        linuxppc-dev@...ts.ozlabs.org,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org,
        Paul Walmsley <paul.walmsley@...ive.com>
Subject: Re: [PATCH v2] arch: vdso: remove if-conditionals of
 $(c-gettimeofday-y)

On Sat, Jul 31, 2021 at 03:00:20PM +0900, Masahiro Yamada wrote:
> arm, arm64, csky, mips, powerpc always select GENERIC_GETTIMEOFDAY,
> hence $(gettimeofday-y) never becomes empty.
> 
> riscv conditionally selects GENERIC_GETTIMEOFDAY when MMU=y && 64BIT=y,
> but arch/riscv/kernel/vdso/vgettimeofday.o is built only under that
> condition. So, you can always define CFLAGS_vgettimeofday.o
> 
> Remove all the meaningless conditionals.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Acked-by: Catalin Marinas <catalin.marinas@....com>