linux-kernel - Re: [PATCH] remove DMA_nBIT

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Message-Id: <20090508083610Z.fujita.tomonori@lab.ntt.co.jp>
Date:	Fri, 8 May 2009 08:35:21 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	jirislaby@...il.com
Cc:	yanghy@...fujitsu.com, akpm@...ux-foundation.org,
	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [PATCH] remove DMA_nBIT_MASK macro

On Thu, 07 May 2009 10:46:09 +0200
Jiri Slaby <jirislaby@...il.com> wrote:

> On 05/07/2009 10:29 AM, Yang Hongyang wrote:
> > Shall we use something like below to warn people?
> > #define DMA_64BIT_MASK	DMA_BIT_MASK(64);(__deprecated warnings:use DMA_BIT_MASK(64) instead) ?
> 
> Something like an irq flags deprecation in the past:
> http://lwn.net/Articles/229673/
> ?
> 
> I don't know how many in-initializer (struct x x = { DMA_64BIT_MASK } )
> users are out there though.

Unfortunately, there are lots. Converting these macros to functions
would breaks drivers too.
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