linux-kernel - Re: [PATCH] pci: print out DMA mask info

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Date:	Fri, 10 Oct 2008 10:18:33 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	grundler@...isc-linux.org, mingo@...e.hu, tglx@...utronix.de,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH] pci: print out DMA mask info

 > Open-coding DMA_BIT_MASK() within your driver means that we no longer
 > have a canonical list of DMA masks in one place.  Instead we have to
 > grep the entire tree and come up with more-or-less complex scripts to
 > figure out which bit masks are actually in use.

Out of curiousity, why do we care about that list?

 - R.
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