linux-kernel - [PATCH] device: add dev_WARN

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Message-Id: <1300283975-27556-1-git-send-email-balbi@ti.com>
Date:	Wed, 16 Mar 2011 15:59:35 +0200
From:	Felipe Balbi <balbi@...com>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Magnus Damm <damm@...nsource.se>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH] device: add dev_WARN_ONCE

it's quite useful to print the device name
on the stack dump caused by WARN(), but
there are other cases where we might want
to use WARN_ONCE.

Introduce a helper similar to dev_WARN() for
that case too.

Signed-off-by: Felipe Balbi <balbi@...com>
---
 include/linux/device.h |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index 1bf5cf0..83870b8 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -739,13 +739,17 @@ do {						     \
 #endif
 
 /*
- * dev_WARN() acts like dev_printk(), but with the key difference
+ * dev_WARN*() acts like dev_printk(), but with the key difference
  * of using a WARN/WARN_ON to get the message out, including the
  * file/line information and a backtrace.
  */
 #define dev_WARN(dev, format, arg...) \
 	WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg);
 
+#define dev_WARN_ONCE(dev, condition, format, arg...) \
+	WARN_ONCE(condition, "Device %s\n" format, \
+			dev_driver_string(dev), ## arg)
+
 /* Create alias, so I can be autoloaded. */
 #define MODULE_ALIAS_CHARDEV(major,minor) \
 	MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
-- 
1.7.4.rc2

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