linux-kernel - Re: [PATCH] include/linux/usb/usb_phy_gen_xceiv.h: check built-in or module for swithing usb_nop_xceiv

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Message-ID: <52857ABA.2020800@asianux.com>
Date:	Fri, 15 Nov 2013 09:36:58 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Greg KH <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Felipe Balbi <balbi@...com>
Subject: Re: [PATCH] include/linux/usb/usb_phy_gen_xceiv.h: check built-in
 or module for swithing usb_nop_xceiv_register() implementation

On 11/15/2013 02:37 AM, Tony Lindgren wrote:
> * Chen Gang <gang.chen@...anux.com> [131023 02:57]:
>> When CONFIG_NOP_USB_XCEIV is as 'm', usb_nop_xceiv_register() will be
>> exported when the related module is loaded. So for built-in source
>> code, still need use the empty one.
>>
>> Or it will can not pass compiling, the related error (for arm, with 
>> allmodconfig):
>>
>>   arch/arm/mach-omap2/built-in.o: In function `omap3_evm_init':
>>   arch/arm/mach-omap2/board-omap3evm.c:703: undefined reference to `usb_nop_xceiv_register'
>>
>>
>> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> 
> Added Felipe to cc, he should probably deal with this one.
> 

OK, thank you very much.

And welcome Felipe to help checking, when he has time.

:-)

> Regards,
> 
> Tony
> 
>> ---
>>  include/linux/usb/usb_phy_gen_xceiv.h |    3 ++-
>>  1 files changed, 2 insertions(+), 1 deletions(-)
>>
>> diff --git a/include/linux/usb/usb_phy_gen_xceiv.h b/include/linux/usb/usb_phy_gen_xceiv.h
>> index f9a7e7b..8515958 100644
>> --- a/include/linux/usb/usb_phy_gen_xceiv.h
>> +++ b/include/linux/usb/usb_phy_gen_xceiv.h
>> @@ -12,7 +12,8 @@ struct usb_phy_gen_xceiv_platform_data {
>>  	unsigned int needs_reset:1;
>>  };
>>  
>> -#if IS_ENABLED(CONFIG_NOP_USB_XCEIV)
>> +#if IS_BUILTIN(CONFIG_NOP_USB_XCEIV) || \
>> +	(IS_MODULE(CONFIG_NOP_USB_XCEIV) && defined(MODULE))
>>  /* sometimes transceivers are accessed only through e.g. ULPI */
>>  extern void usb_nop_xceiv_register(void);
>>  extern void usb_nop_xceiv_unregister(void);
>> -- 
>> 1.7.7.6
> 
> 


-- 
Chen Gang
--
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