alsa: fix snd_BUG_on() and friends

sound/pci/pcxhr/pcxhr_core.c: In function 'pcxhr_set_pipe_cmd_params':
sound/pci/pcxhr/pcxhr_core.c:700: warning: statement with no effect
sound/pci/pcxhr/pcxhr_core.c:706: warning: statement with no effect
sound/pci/pcxhr/pcxhr_core.c:710: warning: statement with no effect

Due to

try to fix this, and be more conventional about the empty stubs.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/include/sound/core.h b/include/sound/core.h
index e5eec5f..7e55894 100644 (file)
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -388,9 +388,13 @@ void snd_verbose_printd(const char *file, int line, const char *format, ...)
 
 #else /* !CONFIG_SND_DEBUG */
 
-#define snd_printd(fmt, args...)       /* nothing */
-#define snd_BUG()                      /* nothing */
-#define snd_BUG_ON(cond)       ({/*(void)(cond);*/ 0;})  /* always false */
+#define snd_printd(fmt, args...)       do { } while (0)
+#define snd_BUG()                      do { } while (0)
+static inline int __snd_bug_on(void)
+{
+       return 0;
+}
+#define snd_BUG_ON(cond)               __snd_bug_on()  /* always false */
 
 #endif /* CONFIG_SND_DEBUG */