linux-kernel - Re: [PATCH -mm 7/7] pci: move pci_set_dma_mask and pci_set_consistent_dma

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Date:	Wed, 3 Mar 2010 08:23:15 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	akpm@...ux-foundation.org, fujita.tomonori@....ntt.co.jp,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 7/7] pci: move pci_set_dma_mask and
 pci_set_consistent_dma_mask to pci-dma-compat.h

On Wed, 3 Mar 2010 11:58:31 +0900
FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:

> On Tue, 2 Mar 2010 18:29:27 -0800
> Andrew Morton <akpm@...ux-foundation.org> wrote:
> 
> > On Fri, 12 Feb 2010 18:33:32 +0900 FUJITA Tomonori
> > <fujita.tomonori@....ntt.co.jp> wrote:
> > 
> > > We can use pci-dma-compat.h to implement pci_set_dma_mask and
> > > pci_set_consistent_dma_mask as we do with the other PCI DMA API.
> > > 
> > > We can remove HAVE_ARCH_PCI_SET_DMA_MASK too.
> > 
> > i386 allnoconfig:
> 
> Sorry about that.
> 
> > include/asm-generic/pci-dma-compat.h:105: error: redefinition of
> > 'pci_set_dma_mask' include/linux/pci.h:1092: error: previous
> > definition of 'pci_set_dma_mask' was here
> > include/asm-generic/pci-dma-compat.h:110: error: redefinition of
> > 'pci_set_consistent_dma_mask' include/linux/pci.h:1097: error:
> > previous definition of 'pci_set_consistent_dma_mask' was here
> > 
> > In fact the whole of include/asm-generic/pci-dma-compat.h seems a
> > bit fishy when CONFIG_PCI=n.  Shouldn't all those functions be
> > EIO-returning stubs?
> 
> Might be (and it should work). However, when CONFIG_PCI=n, we has
> silently converted the PCI DMA API to the generic DMA API.
> 
> In the long term, we remove the pci_dma_* API.
> 
> Can you fold this into the above patch?
> 
> diff --git a/include/asm-generic/pci-dma-compat.h
> b/include/asm-generic/pci-dma-compat.h index ddfa9c5..1437b7d 100644
> --- a/include/asm-generic/pci-dma-compat.h
> +++ b/include/asm-generic/pci-dma-compat.h
> @@ -101,6 +101,7 @@ pci_dma_mapping_error(struct pci_dev *pdev,
> dma_addr_t dma_addr) return dma_mapping_error(&pdev->dev, dma_addr);
>  }
>  
> +#ifdef CONFIG_PCI
>  static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
>  {
>  	return dma_set_mask(&dev->dev, mask);
> @@ -110,5 +111,6 @@ static inline int
> pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask) {
>  	return dma_set_coherent_mask(&dev->dev, mask);
>  }
> +#endif
>  
>  #endif

Oops, I missed these in my last round of applications because they
weren't in PCI patchwork; can you cc linux-pci@...r.kernel.org in the
future so the patchwork bot picks them up?

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center
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