linux-kernel - Re: [PATCH] arch: arm64: include: asm: add pci.h to pass compiling

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Message-ID: <51CB87B0.8030805@asianux.com>
Date:	Thu, 27 Jun 2013 08:30:40 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	Will Deacon <Will.Deacon@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] arch: arm64: include: asm: add pci.h to pass compiling

On 06/26/2013 10:07 PM, Catalin Marinas wrote:
> On Wed, Jun 26, 2013 at 04:26:41AM +0100, Chen Gang wrote:
>> > Need add pci.h for compiling, the related error (with allmodconfig):
>> > 
>> >   drivers/media/usb/b2c2/flexcop-usb.c: In function ‘flexcop_usb_transfer_exit’:
>> >   drivers/media/usb/b2c2/flexcop-usb.c:393:3: error: implicit declaration of function ‘pci_free_consistent’ [-Werror=implicit-function-declaration]
>> >   drivers/media/usb/b2c2/flexcop-usb.c: In function ‘flexcop_usb_transfer_init’:
>> >   drivers/media/usb/b2c2/flexcop-usb.c:410:2: error: implicit declaration of function ‘pci_alloc_consistent’ [-Werror=implicit-function-declaration]
>> >   drivers/media/usb/b2c2/flexcop-usb.c:410:21: warning: assignment makes pointer from integer without a cast [enabled by default]
>> >   cc1: some warnings being treated as errors
>> > 
>> > Signed-off-by: Chen Gang <gang.chen@...anux.com>
>> > ---
>> >  arch/arm64/include/asm/pci.h |   11 +++++++++++
>> >  1 files changed, 11 insertions(+), 0 deletions(-)
>> >  create mode 100644 arch/arm64/include/asm/pci.h
>> > 
>> > diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
>> > new file mode 100644
>> > index 0000000..2ed467f
>> > --- /dev/null
>> > +++ b/arch/arm64/include/asm/pci.h
>> > @@ -0,0 +1,11 @@
>> > +#ifndef ASMARM64_PCI_H
>> > +#define ASMARM64_PCI_H
>> > +
>> > +#ifdef __KERNEL__
>> > +
>> > +#include <asm-generic/pci-dma-compat.h>
>> > +#include <asm-generic/pci.h>
>> > +
>> > +#endif /* __KERNEL__ */
>> > +
>> > +#endif
> I wonder whether it makes sense to include pci-dma-compat.h in
> asm-generic/pci.h, I don't see why one would want the generic pci.h but
> not the generic pci-dma-compat.h (cc'ing Arnd).

I think, it will let architecture guys easier to add their own
pci-dma-compat.h (although they still need generic pci_dma_compat.h, and
generic pci.h, too).

e.g. one architecture want include generic pci-dma-compat.h firstly,
then define its own features in its own pci-dma-compat.h.

Thanks.
-- 
Chen Gang
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