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

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Message-ID: <20110311003846.GA23548@linux-mips.org>
Date:	Fri, 11 Mar 2011 01:38:46 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	David Daney <ddaney@...iumnetworks.com>,
	Jason Baron <jbaron@...hat.com>, peterz@...radead.org,
	hpa@...or.com, mingo@...e.hu, tglx@...utronix.de,
	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
Subject: Re: [PATCH 0/2] jump label: update for .39

On Thu, Mar 10, 2011 at 04:22:14PM -0500, Mathieu Desnoyers wrote:

> You seem to be contradicting yourself here. I'm concerned about having
> "structures" of a size not power of two. Can we simply either
> 
> - Add a padding element at the end
> or
> - use .align 4*sizeof(long) at the beginning
> 
> to make sure the linker won't put any holes when it puts objects 
> together ?

It may only be a technicality but but careful with .align.  On some
architectures .align x will align to a multiple of x; on other
architectures to 2^x.  Another reason to stick to C wherever possible.

  Ralf
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