linux-kernel - Re: [tip:perf/core] jump label: x86 support

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Message-ID: <4C9CCF98.7000506@zytor.com>
Date:	Fri, 24 Sep 2010 09:19:36 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	rostedt@...dmis.org, tglx@...utronix.de, jbaron@...hat.com
CC:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perf/core] jump label: x86 support

On 09/24/2010 02:01 AM, tip-bot for Jason Baron wrote:
> Commit-ID:  d9f5ab7b1c0a520867af389bab5d5fcdbd0e407e
> Gitweb:     http://git.kernel.org/tip/d9f5ab7b1c0a520867af389bab5d5fcdbd0e407e
> Author:     Jason Baron <jbaron@...hat.com>
> AuthorDate: Fri, 17 Sep 2010 11:09:22 -0400
> Committer:  Steven Rostedt <rostedt@...dmis.org>
> CommitDate: Wed, 22 Sep 2010 16:33:03 -0400
> 
> jump label: x86 support
> 
> add x86 support for jump label. I'm keeping this patch separate so its clear
> to arch maintainers what was required for x86 support this new feature.
> Hopefully, it wouldn't be too painful for other archs.
> 
> Signed-off-by: Jason Baron <jbaron@...hat.com>
> LKML-Reference: <f838f49f40fbea0254036194be66dc48b598dcea.1284733808.git.jbaron@...hat.com>
> 
> [ cleaned up some formatting ]
> 
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
>  arch/x86/Kconfig                  |    1 +
>  arch/x86/include/asm/jump_label.h |   47 ++++++++++++++++++++++++++++++++++
>  arch/x86/kernel/Makefile          |    2 +-
>  arch/x86/kernel/jump_label.c      |   50 +++++++++++++++++++++++++++++++++++++
>  arch/x86/kernel/module.c          |    3 ++
>  5 files changed, 102 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index cea0cd9..afcd663 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -59,6 +59,7 @@ config X86
>  	select ANON_INODES
>  	select HAVE_ARCH_KMEMCHECK
>  	select HAVE_USER_RETURN_NOTIFIER
> +	select HAVE_ARCH_JUMP_LABEL if !CC_OPTIMIZE_FOR_SIZE
>  
>  config INSTRUCTION_DECODER
>  	def_bool (KPROBES || PERF_EVENTS)

What the heck?  I had NAKed at least this chunk already...

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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