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

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Date:	Mon, 11 Jun 2012 11:13:15 +0200
From:	Andrzej Pietrasiewicz <andrzej.p@...sung.com>
To:	linux-usb@...r.kernel.org
Cc:	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>,
	Andrzej Pietrasiewicz <andrzej.p@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...verdev.osuosl.org
Subject: [PATCH 2/2] drivers: usb: gadget: add multiple definition guards

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>
---
 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
 
 /*-------------------------------------------------------------------------*/
-- 
1.7.0.4

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