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 19:41:53 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Roger Quadros <rogerq@...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 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It is obsolete too, we may use dev_vdbg instead of it.

>  /* 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
> 

-- 

Best Regards,
Peter Chen
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