linux-kernel - Re: [PATCH 09/10] Change table chaining layout

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Message-ID: <alpine.LFD.0.999.0710221343330.30120@woody.linux-foundation.org>
Date:	Mon, 22 Oct 2007 13:44:43 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	mingo@...e.hu, Linux/m68k <linux-m68k@...r.kernel.org>
Subject: Re: [PATCH 09/10] Change table chaining layout



On Mon, 22 Oct 2007, Alan Cox wrote:
> 
> Why can't we just make the list one item longer than the entry count and
> stick a NULL on the end of it like normal people ? Then you need one bit
> which ought to be safe for everyone (and if the bit is a macro any CPU
> warped enough to have byte alignment is surely going to have top bits
> spare...)

Well, quite frankly, equally easy is to just add a

	__attribute__((aligned(4)))

or whatever the gcc syntax for that is today.. That guarantees that gcc 
lays things out properly.

		Linus
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