linux/sound/usb/debug.h

#ifndef __USBAUDIO_DEBUG_H
#define __USBAUDIO_DEBUG_H

/*
 * h/w constraints
 */

#ifdef HW_CONST_DEBUG
#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
#else
#define hwc_debug(fmt, args...) do { } while(0)
#endif

#endif /* __USBAUDIO_DEBUG_H */
ALSA: usb-audio: refactor code Clean up the usb audio driver by factoring out a lot of functions to separate files. Code for procfs, quirks, urbs, format parsers etc all got a new home now. Moved almost all special quirk handling to quirks.c and introduced new generic functions to handle them, so the exceptions do not pollute the whole driver. Renamed usbaudio.c to card.c because this is what it actually does now. Renamed usbmidi.c to midi.c for namespace clarity. Removed more things from usbaudio.h. The non-standard drivers were adopted accordingly. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> 2010-03-05 02:46:13 +08:00			`#ifndef __USBAUDIO_DEBUG_H`
			`#define __USBAUDIO_DEBUG_H`

			`/*`
			`* h/w constraints`
			`*/`

			`#ifdef HW_CONST_DEBUG`
			`#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)`
			`#else`
ALSA: usb-audio: make hwc_debug a noop in case HW_CONST_DEBUG is not set Just defining it to nothing is dangerous as it can alter the code execution flow, for example when used in as only function in a conditional code block. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> 2011-05-18 17:28:39 +08:00			`#define hwc_debug(fmt, args...) do { } while(0)`
ALSA: usb-audio: refactor code Clean up the usb audio driver by factoring out a lot of functions to separate files. Code for procfs, quirks, urbs, format parsers etc all got a new home now. Moved almost all special quirk handling to quirks.c and introduced new generic functions to handle them, so the exceptions do not pollute the whole driver. Renamed usbaudio.c to card.c because this is what it actually does now. Renamed usbmidi.c to midi.c for namespace clarity. Removed more things from usbaudio.h. The non-standard drivers were adopted accordingly. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> 2010-03-05 02:46:13 +08:00			`#endif`

			`#endif /* __USBAUDIO_DEBUG_H */`