linux-kernel - Re: [PATCH] SSB: make it depend on PCI

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Message-Id: <1225970982.3619.211.camel@johannes.berg>
Date:	Thu, 06 Nov 2008 12:29:42 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	Mike Frysinger <vapier@...too.org>, Michael Buesch <mb@...sch.de>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] SSB: make it depend on PCI

On Thu, 2008-11-06 at 06:26 -0500, Mike Frysinger wrote:
> On Thu, Nov 6, 2008 at 06:22, Johannes Berg wrote:
> > On Thu, 2008-11-06 at 06:15 -0500, Mike Frysinger wrote:
> >> while that may be the intent, it doesnt work today.
> >>
> >> drivers/ssb/main.c always includes linux/ssb/ssb.h
> >>
> >> linux/ssb/ssb.h always calls pci_dma_* functions
> >>
> >> arches that do not support PCI fail to build:
> >>   CC      drivers/ssb/main.o
> >> In file included from drivers/ssb/ssb_private.h:5,
> >>                  from drivers/ssb/main.c:12:
> >> include/linux/ssb/ssb.h: In function 'ssb_dma_mapping_error':
> >> include/linux/ssb/ssb.h:430: error: implicit declaration of function 'pci_dma_mapping_error'
> >> include/linux/ssb/ssb.h: In function 'ssb_dma_sync_single_for_cpu':
> >> include/linux/ssb/ssb.h:475: error: implicit declaration of function 'pci_dma_sync_single_for_cpu'
> >> include/linux/ssb/ssb.h: In function 'ssb_dma_sync_single_for_device':
> >> include/linux/ssb/ssb.h:493: error: implicit declaration of function 'pci_dma_sync_single_for_device'
> >> include/linux/ssb/ssb.h: In function 'ssb_dma_sync_single_range_for_cpu':
> >> include/linux/ssb/ssb.h:517: error: implicit declaration of function 'dma_sync_single_range_for_cpu'
> >> include/linux/ssb/ssb.h: In function 'ssb_dma_sync_single_range_for_device':
> >> include/linux/ssb/ssb.h:538: error: implicit declaration of function 'dma_sync_single_range_for_device'
> >> drivers/ssb/main.c: In function 'ssb_dma_set_mask':
> >> drivers/ssb/main.c:1183: error: implicit declaration of function 'dma_set_mask'
> >
> >
> > That seems odd, shouldn't at least the dma_sync_* functions and
> > dma_set_mask be supported?
> 
> i'm highlighting the pci-specific functions.  the common dma functions
> missing are not a ssb problem, so ignore those ;).

Alright, but even then you'll fail build if you enable SSB ;) I guess we
need ifdefs or mandate that non-PCI architectures have dummy stubs (like
other architectures have in the !CONFIG_PCI case), but Michael's the SSB
expert.

johannes

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