[PATCH 31/46] debug: Introduce a dev_WARN() function

From: Greg Kroah-Hartman
Date: Thu Oct 16 2008 - 13:26:46 EST

From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>

in the line of dev_printk(), this patch introduces a dev_WARN() function,
that takes a struct device and then a printk format/args set of arguments.
Unlike dev_printk(), the effect is that of WARN() in that a full warning
message (including filename/line, module list, versions and a backtrace)
is printed in addition to the device name and the arguments.

Signed-off-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
include/linux/device.h | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index fb03446..ec90e79 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -570,6 +570,14 @@ extern const char *dev_driver_string(const struct device *dev);
({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; })

+ * 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);
/* Create alias, so I can be autoloaded. */
#define MODULE_ALIAS_CHARDEV(major,minor) \
MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))

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