linux-kernel - Re: [PATCH v2 1/8] arm64: compat: vdso: Expose BUILD

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Message-ID: <c0b1673d-e37d-a526-0862-ad07f779f5bf@arm.com>
Date:   Tue, 3 Sep 2019 15:36:16 +0100
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     catalin.marinas@....com, 0x7f454c46@...il.com, salyzyn@...roid.com,
        paul.burton@...s.com, luto@...nel.org, tglx@...utronix.de,
        will@...nel.org
Subject: Re: [PATCH v2 1/8] arm64: compat: vdso: Expose BUILD_VDSO32

Hi Catalin and Will,

On 8/30/19 2:58 PM, Vincenzo Frascino wrote:
> clock_gettime32 and clock_getres_time32 should be compiled only with the
> 32 bit vdso library.
> 
> Expose BUILD_VDSO32 when arm64 compat is compiled, to provide an
> indication to the generic library to include these symbols.
> 
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will@...nel.org>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com>
> Acked-by: Catalin Marinas <catalin.marinas@....com>
> ---
>  arch/arm64/include/asm/vdso/compat_gettimeofday.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/include/asm/vdso/compat_gettimeofday.h b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
> index c50ee1b7d5cd..fe7afe0f1a3d 100644
> --- a/arch/arm64/include/asm/vdso/compat_gettimeofday.h
> +++ b/arch/arm64/include/asm/vdso/compat_gettimeofday.h
> @@ -17,6 +17,7 @@
>  #define VDSO_HAS_CLOCK_GETRES		1
>  
>  #define VDSO_HAS_32BIT_FALLBACK		1
> +#define BUILD_VDSO32			1
>  
>  static __always_inline
>  int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
> 

This patch is independent from the rest and touches only arch code. Can it go in
via the arm64 tree?

-- 
Regards,
Vincenzo