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ALSA: usb-audio: make hwc_debug a noop in case HW_CONST_DEBUG is not set

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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>
This commit is contained in:
Daniel Mack 2011-05-18 11:28:39 +02:00 committed by Takashi Iwai
parent 23dc05a33f
commit 60ed286a61
1 changed files with 1 additions and 1 deletions
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2
sound/usb/debug.h
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@ -8,7 +8,7 @@
#ifdef HW_CONST_DEBUG
#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
#else
#define hwc_debug(fmt, args...) /**/
#define hwc_debug(fmt, args...) do { } while(0)
#endif
#endif /* __USBAUDIO_DEBUG_H */