linux-kernel - Re: [PATCH v4 2/3] common: DMA-mapping: add DMA_ATTR

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Message-ID: <20160108133545.GK19062@n2100.arm.linux.org.uk>
Date:	Fri, 8 Jan 2016 13:35:45 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Douglas Anderson <dianders@...omium.org>
Cc:	Robin Murphy <robin.murphy@....com>,
	Tomasz Figa <tfiga@...omium.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Pawel Osciak <pawel@...iak.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>, corbet@....net,
	akpm@...ux-foundation.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] common: DMA-mapping: add DMA_ATTR_NOHUGEPAGE
 attribute

On Thu, Jan 07, 2016 at 04:36:44PM -0800, Douglas Anderson wrote:
> This patch adds the DMA_ATTR_NOHUGEPAGE attribute to the DMA-mapping
> subsystem.

It would be nicer to keep things in the positive-logic sense if at all
possible: flags that indicate "we don't want something" tend to end up
with double or triple negatives somewhere which makes understanding
the code much harder.  It's a shame we have MADV_NOHUGEPAGE...

That's not a strong view, but a preference.

-- 
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