linux-kernel - Re: linux-next: build failure after merge of the final tree (staging related)

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Message-Id: <20110610160938.cd01c408.sfr@canb.auug.org.au>
Date:	Fri, 10 Jun 2011 16:09:38 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Greg KH <greg@...ah.com>
Cc:	brudley@...adcom.com, henryp@...adcom.com, rvossen@...adcom.com,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linus <torvalds@...ux-foundation.org>
Subject: Re: linux-next: build failure after merge of the final tree
 (staging related)

Hi Greg,

On Fri, 10 Jun 2011 16:05:48 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> No, I still get these:
> 
> In file included from drivers/staging/comedi/drivers/addi_apci_035.c:7:0:
> drivers/staging/comedi/drivers/addi-data/addi_common.c: In function 'i_ADDI_Attach':
> drivers/staging/comedi/drivers/addi-data/addi_common.c:2765:7: error: implicit declaration of function 'virt_to_bus'
> 
> virt_to_bus is only defined for 32 bit powerpc (not 64 bit) (and maybe
> not at all on some architectures e.g. sparc).
> 
> From Documentation/DMA-API-HOWTO.txt:
> "All drivers should be using these interfaces with no exceptions.  It
> is planned to completely remove virt_to_bus() and bus_to_virt() as
> they are entirely deprecated.  Some ports already do not provide these
> as it is impossible to correctly support them."

Drivers that use virt_to_bus should Kconfig depend on VIRT_TO_BUS.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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