linux-kernel - Re: [PATCH 0/2] jump label: update for .39

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Message-ID: <1299800584.15854.520.camel@gandalf.stny.rr.com>
Date:	Thu, 10 Mar 2011 18:43:04 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	David Daney <ddaney@...iumnetworks.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Jason Baron <jbaron@...hat.com>, peterz@...radead.org,
	hpa@...or.com, mingo@...e.hu, andi@...stfloor.org,
	roland@...hat.com, rth@...hat.com, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, avi@...hat.com, davem@...emloft.net,
	sam@...nborg.org, michael@...erman.id.au,
	linux-kernel@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH 0/2] jump label: update for .39

On Fri, 2011-03-11 at 00:32 +0100, Thomas Gleixner wrote:

> > It should work, but it hurts my eyes to see the source code forcing a 64-bit
> > word to 32-bit alignment.
> 
> We solved such stuff with macros in other places already.
> 
> #ifdef 64bit
> # define BLA 8
> #else
> # define BLA 4
> #endif
> 
> and then use 
> 
> .aling BLA
> 
> Where is the problem?

That's basically the solution that Jason came up with, and what I
expected. What caught my eye was that David Miller had .align 4 for this
on sparc which is the one arch that is truly picky about such things. As
I understood more about this, I see that would work for both archs.

That doesn't mean I'm against the .align BLA solution.

-- Steve


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