ALSA: pcm: Add snd_printd_ratelimit()

Direct calls to printk_limit() will emit log noise even when CONFIG_SND_DEBUG is not defined. Add a wrapper macro around printk_limit() that is conditionally defined by CONFIG_SND_DEBUG. Cc: Jaroslav Kysela <[email protected]> Cc: Takashi Iwai <[email protected]> Cc: Pierre-Louis Bossart <[email protected]> Cc: Lars-Peter Clausen <[email protected]> Cc: Yacine Belkadi <[email protected]> Signed-off-by: Tim Gardner <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
adn770 · Aug 19, 2013 · bcbb155 · bcbb155
1 parent c841ad2
commit bcbb155
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/include/sound/core.h b/include/sound/core.h
@@ -27,6 +27,7 @@
 #include <linux/rwsem.h>		/* struct rw_semaphore */
 #include <linux/pm.h>			/* pm_message_t */
 #include <linux/stringify.h>
+#include <linux/printk.h>
 
 /* number of supported soundcards */
 #ifdef CONFIG_SND_DYNAMIC_MINORS
@@ -375,6 +376,11 @@ void __snd_printk(unsigned int level, const char *file, int line,
  */
 #define snd_BUG()		WARN(1, "BUG?\n")
 
+/**
+ * Suppress high rates of output when CONFIG_SND_DEBUG is enabled.
+ */
+#define snd_printd_ratelimit() printk_ratelimit()
+
 /**
  * snd_BUG_ON - debugging check macro
  * @cond: condition to evaluate
@@ -398,6 +404,8 @@ static inline void _snd_printd(int level, const char *format, ...) {}
 	unlikely(__ret_warn_on); \
 })
 
+static inline bool snd_printd_ratelimit(void) { return false; }
+
 #endif /* CONFIG_SND_DEBUG */
 
 #ifdef CONFIG_SND_DEBUG_VERBOSE