linux-kernel - Re: [PATCH -mm] dma-mapping.h: add the dma

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Date:	Sat, 13 Feb 2010 11:49:09 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	akpm@...ux-foundation.org
Cc:	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org,
	James.Bottomley@...e.de, davem@...emloft.net,
	jbarnes@...tuousgeek.org, arnd@...db.de
Subject: Re: [PATCH -mm] dma-mapping.h: add the dma_unmap state API

On Fri, 12 Feb 2010 11:51:57 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> > -#ifdef CONFIG_NEED_DMA_MAP_STATE
> > -#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)        dma_addr_t ADDR_NAME;
> > -#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)          __u32 LEN_NAME;
> 
> But we already screwed up the semicolon thing.  If you grep the tree you'll
> see that about half of the users of this macro added their own semicolon:

Yeah, I know. PCI-DMA-mapping.txt says:

NOTE: DO NOT put a semicolon at the end of the DECLARE_*() macro.


But there are some other DECLARE_ macros that don't have the
semicolons so users could be easily confused.

#define DEFINE_DMA_MAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME

looks better?


> ./drivers/net/cxgb3/sge.c:              DECLARE_PCI_UNMAP_ADDR(addr);
> ./drivers/net/skge.h:   DECLARE_PCI_UNMAP_ADDR(mapaddr);
> ./drivers/net/qla3xxx.h:         DECLARE_PCI_UNMAP_ADDR(mapaddr);
> ./drivers/net/qla3xxx.h:         DECLARE_PCI_UNMAP_ADDR(mapaddr);
> ./drivers/net/tg3.h:    DECLARE_PCI_UNMAP_ADDR(mapping)
> 
> 
> Perhaps someone will clean all that up sometime.

I plan to replace these PCI API with the new generic API so I can take
care of them together.
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