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device: add dev_WARN_ONCE

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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@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi 2011-03-16 15:59:35 +02:00 • committed by Greg Kroah-Hartman
parent f0e615c3cb
commit bcdd323b89
1 changed files with 5 additions and 1 deletions
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6
include/linux/device.h
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@ -742,13 +742,17 @@ do { \
#endif #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 * of using a WARN/WARN_ON to get the message out, including the
* file/line information and a backtrace. * file/line information and a backtrace.
*/ */
#define dev_WARN(dev, format, arg...) \ #define dev_WARN(dev, format, arg...) \
WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## 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. */ /* Create alias, so I can be autoloaded. */
#define MODULE_ALIAS_CHARDEV(major,minor) \ #define MODULE_ALIAS_CHARDEV(major,minor) \
MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor)) MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))