linux-kernel - Re: [PATCH 2/2] drivers: usb: gadget: add multiple definition guards

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Message-ID: <4FD76B95.60708@xenotime.net>
Date:	Tue, 12 Jun 2012 09:17:25 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Andrzej Pietrasiewicz <andrzej.p@...sung.com>
CC:	linux-usb@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Michal Nazarewicz <mnazarewicz@...il.com>,
	Benoit Goby <benoit@...roid.com>,
	Mike Lockwood <lockwood@...roid.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...verdev.osuosl.org
Subject: Re: [PATCH 2/2] drivers: usb: gadget: add multiple definition guards

On 06/11/2012 02:13 AM, Andrzej Pietrasiewicz wrote:

> If f_fs.c and u_serial.c are combined together using #include, which has
> been a common practice so far, the pr_vdebug macro is defined multiple
> times. Define it only once.
> 
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...sung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>


Acked-by: Randy Dunlap <rdunlap@...otime.net>

Thanks.

> ---
>  drivers/usb/gadget/f_fs.c     |    4 ++++
>  drivers/usb/gadget/u_serial.c |    4 ++++
>  2 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
> index dcd1c7f..27c841d 100644
> --- a/drivers/usb/gadget/f_fs.c
> +++ b/drivers/usb/gadget/f_fs.c
> @@ -33,11 +33,15 @@
>  /* Debugging ****************************************************************/
>  
>  #ifdef VERBOSE_DEBUG
> +#ifndef pr_vdebug
>  #  define pr_vdebug pr_debug
> +#endif /* pr_vdebug */
>  #  define ffs_dump_mem(prefix, ptr, len) \
>  	print_hex_dump_bytes(pr_fmt(prefix ": "), DUMP_PREFIX_NONE, ptr, len)
>  #else
> +#ifndef pr_vdebug
>  #  define pr_vdebug(...)                 do { } while (0)
> +#endif /* pr_vdebug */
>  #  define ffs_dump_mem(prefix, ptr, len) do { } while (0)
>  #endif /* VERBOSE_DEBUG */
>  
> diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
> index 5b3f5ff..da6d479 100644
> --- a/drivers/usb/gadget/u_serial.c
> +++ b/drivers/usb/gadget/u_serial.c
> @@ -132,11 +132,15 @@ static unsigned	n_ports;
>  
>  
>  #ifdef VERBOSE_DEBUG
> +#ifndef pr_vdebug
>  #define pr_vdebug(fmt, arg...) \
>  	pr_debug(fmt, ##arg)
> +#endif /* pr_vdebug */
>  #else
> +#ifndef pr_vdebig
>  #define pr_vdebug(fmt, arg...) \
>  	({ if (0) pr_debug(fmt, ##arg); })
> +#endif /* pr_vdebug */
>  #endif
>  
>  /*-------------------------------------------------------------------------*/



-- 
~Randy
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