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Commit bcdd323b authored by Felipe Balbi's avatar Felipe Balbi Committed by Greg Kroah-Hartman
Browse files

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: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent f0e615c3

include/linux/device.h

+5 −1
Original line number Diff line number Diff line
@@ -742,13 +742,17 @@ 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))