linux-kernel - Re: [RFC][PATCH v2 03/13] usb: otg-fsm: Prevent build warning "VDBG" redefined

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Date:	Thu, 16 Apr 2015 14:59:12 +0300
From:	Roger Quadros <rogerq@...com>
To:	Peter Chen <peter.chen@...escale.com>
CC:	<gregkh@...uxfoundation.org>, <balbi@...com>,
	<stern@...land.harvard.edu>, <dan.j.williams@...el.com>,
	<jun.li@...escale.com>, <mathias.nyman@...ux.intel.com>,
	<tony@...mide.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>
Subject: Re: [RFC][PATCH v2 03/13] usb: otg-fsm: Prevent build warning "VDBG"
 redefined

On 16/04/15 14:41, Peter Chen wrote:
> On Tue, Apr 14, 2015 at 01:41:50PM +0300, Roger Quadros wrote:
>> If usb/otg-fsm.h and usb/composite.h are included together
>> then it results in the build warning [1].
>>
>> Prevent that by moving the VDBG defination into the
>> usb-otg-fsm.c file where it is used.
>>
>> Also get rid of MPC_LOC which doesn't seem to be used
>> by anyone.
>>
>> [1] - warning fixed by this patch:
>>
>>    In file included from drivers/usb/dwc3/core.h:33,
>>                     from drivers/usb/dwc3/ep0.c:33:
>>    include/linux/usb/otg-fsm.h:30:1: warning: "VDBG" redefined
>>    In file included from drivers/usb/dwc3/ep0.c:31:
>>    include/linux/usb/composite.h:615:1: warning: this is the location of the previous definition
>>
>> Signed-off-by: Roger Quadros <rogerq@...com>
>> ---
>>  drivers/usb/common/usb-otg-fsm.c |  9 +++++++++
>>  include/linux/usb/otg-fsm.h      | 15 ---------------
>>  2 files changed, 9 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
>> index 0caa37b..35f311a 100644
>> --- a/drivers/usb/common/usb-otg-fsm.c
>> +++ b/drivers/usb/common/usb-otg-fsm.c
>> @@ -30,6 +30,15 @@
>>  #include <linux/usb/otg.h>
>>  #include <linux/usb/otg-fsm.h>
>>  
>> +#undef VDBG
>> +
>> +#ifdef VERBOSE
>> +#define VDBG(fmt, args...) pr_debug("[%s]  " fmt , \
>> +				 __func__, ## args)
>> +#else
>> +#define VDBG(stuff...)	do {} while (0)
>> +#endif
>> +
> 
> It is obsolete too, we may use dev_vdbg instead of it.

ok, we need to add 'struct device *' to 'struct otg_fsm' then.

cheers,
-roger

> 
>>  /* Change USB protocol when there is a protocol change */
>>  static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
>>  {
>> diff --git a/include/linux/usb/otg-fsm.h b/include/linux/usb/otg-fsm.h
>> index 85a9150..73136aa 100644
>> --- a/include/linux/usb/otg-fsm.h
>> +++ b/include/linux/usb/otg-fsm.h
>> @@ -21,21 +21,6 @@
>>  #include <linux/mutex.h>
>>  #include <linux/errno.h>
>>  
>> -#undef VERBOSE
>> -
>> -#ifdef VERBOSE
>> -#define VDBG(fmt, args...) pr_debug("[%s]  " fmt , \
>> -				 __func__, ## args)
>> -#else
>> -#define VDBG(stuff...)	do {} while (0)
>> -#endif
>> -
>> -#ifdef VERBOSE
>> -#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
>> -#else
>> -#define MPC_LOC do {} while (0)
>> -#endif
>> -
>>  #define PROTO_UNDEF	(0)
>>  #define PROTO_HOST	(1)
>>  #define PROTO_GADGET	(2)
>> -- 
>> 2.1.0
>>
> 

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