linux-kernel - Re: [PATCH] powerpc: Add jump label support

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Message-ID: <1289225915.12418.2.camel@gandalf.stny.rr.com>
Date:	Mon, 08 Nov 2010 09:18:35 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Michael Ellerman <michael@...erman.id.au>
Cc:	linuxppc-dev@...abs.org, Kumar Gala <kumar.gala@...escale.com>,
	"David S.Miller" <davem@...emloft.net>, jbaron@...hat.com,
	linux-kernel@...r.kernel.org, Anton Blanchard <anton@...ba.org>
Subject: Re: [PATCH] powerpc: Add jump label support

On Mon, 2010-11-08 at 15:12 +1100, Michael Ellerman wrote:
> This patch adds support for the new "jump label" feature.

Darn it! I wanted to port this!!!

;-)

> 
> Built for 64 & 32 bit, tested on 64 bit. Survives a kernel build under
> perf with all tracepoints enabled, and manual inspection of the patched
> code looks right. But still, lightly tested, YMMV.
> 
> Unlike x86 and sparc we just merrily patch the code with no locks etc,
> as far as I know this is safe, but I'm not really sure what the x86/sparc
> code is protecting against so maybe it's not.

Thanks, I'll give it a test on my electra as soon as I get a gcc 4.5.1
cross compiler working.

-- Steve


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