debug: Introduce a dev_WARN() function (e6139662) · Commits · 戴 / test

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@linux.intel.com> Signed-off-by:

Greg Kroah-Hartman <gregkh@suse.de>

include/linux/device.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -570,6 +570,14 @@ extern const char dev_driver_string(const struct device dev);
		({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; })
		#endif

		/*
		* 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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