linux-kernel - Re: [PATCH] arm64: add HAVE_LATENCYTOP

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Message-ID: <20151110113408.GF6672@osiris>
Date:	Tue, 10 Nov 2015 12:34:08 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Will Deacon <will.deacon@....com>
Cc:	yalin wang <yalin.wang2010@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: add HAVE_LATENCYTOP_SUPPORT config

> From: Will Deacon <will.deacon@....com>
> Date: Tue, 10 Nov 2015 11:10:04 +0000
> Subject: [PATCH] Kconfig: remove HAVE_LATENCYTOP_SUPPORT
> 
> As illustrated by a3afe70b83fd ("[S390] latencytop s390 support."),
> HAVE_LATENCYTOP_SUPPORT is defined by an architecture to advertise an
> implementation of save_stack_trace_tsk.
> 
> However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk()
> weak alias") a dummy implementation is provided if STACKTRACE=y.
> Given that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects
> STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether.
> 
> Signed-off-by: Will Deacon <will.deacon@....com>
> ---
>  arch/arc/Kconfig        | 3 ---
>  arch/arm/Kconfig        | 5 -----
>  arch/metag/Kconfig      | 3 ---
>  arch/microblaze/Kconfig | 3 ---
>  arch/parisc/Kconfig     | 3 ---
>  arch/powerpc/Kconfig    | 3 ---
>  arch/s390/Kconfig       | 3 ---
>  arch/sh/Kconfig         | 3 ---
>  arch/sparc/Kconfig      | 4 ----
>  arch/unicore32/Kconfig  | 3 ---
>  arch/x86/Kconfig        | 3 ---
>  lib/Kconfig.debug       | 1 -
>  12 files changed, 37 deletions(-)

Acked-by: Heiko Carstens <heiko.carstens@...ibm.com>

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