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>
git-mirror · May 18, 2011 · 60ed286 · 60ed286
1 parent 23dc05a
commit 60ed286
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sound/usb/debug.h b/sound/usb/debug.h
@@ -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 */