linux-kernel - Re: [PATCH v1] perf: starfive: fix 64-bit only COMPILE

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Date: Tue, 19 Mar 2024 15:56:16 +0000
From: Will Deacon <will@...nel.org>
To: Conor Dooley <conor@...nel.org>, catalin.marinas@....com
Cc: linux-riscv@...ts.infradead.org,
	Conor Dooley <conor.dooley@...rochip.com>,
	Palmer Dabbelt <palmer@...osinc.com>,
	Mark Rutland <mark.rutland@....com>,
	Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] perf: starfive: fix 64-bit only COMPILE_TEST condition

On Mon, Mar 18, 2024 at 03:35:04PM +0000, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@...rochip.com>
> 
> ARCH_STARFIVE is not restricted to 64-bit platforms, so while Will's
> addition of a 64-bit only condition satisfied the build robots doing
> COMPILE_TEST builds, Palmer ran into the same problems with writeq()
> being undefined during regular rv32 builds.
> 
> Promote the dependency on 64-bit to its own `depends on` so that the
> driver can never be included in 32-bit builds.
> 
> Reported-by: Palmer Dabbelt <palmer@...osinc.com>
> Fixes: c2b24812f7bc ("perf: starfive: Add StarLink PMU support")
> Fixes: f0dbc6d0de38 ("perf: starfive: Only allow COMPILE_TEST for 64-bit architectures")
> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
> ---
> CC: Will Deacon <will@...nel.org>
> CC: Mark Rutland <mark.rutland@....com>
> CC: Ji Sheng Teoh <jisheng.teoh@...rfivetech.com>
> CC: linux-arm-kernel@...ts.infradead.org
> CC: linux-kernel@...r.kernel.org
> ---
>  drivers/perf/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
> index 5060e1f1ea10..7526a9e714fa 100644
> --- a/drivers/perf/Kconfig
> +++ b/drivers/perf/Kconfig
> @@ -87,7 +87,8 @@ config RISCV_PMU_SBI
>  	  filtering, counter configuration.
>  
>  config STARFIVE_STARLINK_PMU
> -	depends on ARCH_STARFIVE || (COMPILE_TEST && 64BIT)
> +	depends on ARCH_STARFIVE || COMPILE_TEST
> +	depends on 64BIT
>  	bool "StarFive StarLink PMU"
>  	help
>  	   Provide support for StarLink Performance Monitor Unit.
> -- 
> 2.43.0


Thanks guys, I don't know what a starfive is so sorry for not spotting
this when I noticed the build failure on arm64.

Acked-by: Will Deacon <will@...nel.org>

Catalin -- please can you pick this into the arm64 fixes branch for -rc1?

Cheers,

Will