+EXPORT_SYMBOL_GPL(cpufreq_cpu_put);
+
+
+/*********************************************************************
+ * UNIFIED DEBUG HELPERS *
+ *********************************************************************/
+#ifdef CONFIG_CPU_FREQ_DEBUG
+
+/* what part(s) of the CPUfreq subsystem are debugged? */
+static unsigned int debug;
+
+/* is the debug output ratelimit'ed using printk_ratelimit? User can
+ * set or modify this value.
+ */
+static unsigned int debug_ratelimit = 1;
+
+/* is the printk_ratelimit'ing enabled? It's enabled after a successful
+ * loading of a cpufreq driver, temporarily disabled when a new policy
+ * is set, and disabled upon cpufreq driver removal
+ */
+static unsigned int disable_ratelimit = 1;
+static DEFINE_SPINLOCK(disable_ratelimit_lock);
+
+static inline void cpufreq_debug_enable_ratelimit(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&disable_ratelimit_lock, flags);
+ if (disable_ratelimit)
+ disable_ratelimit--;
+ spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
+}
+
+static inline void cpufreq_debug_disable_ratelimit(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&disable_ratelimit_lock, flags);
+ disable_ratelimit++;
+ spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
+}
+
+void cpufreq_debug_printk(unsigned int type, const char *prefix, const char *fmt, ...)
+{
+ char s[256];
+ va_list args;
+ unsigned int len;
+ unsigned long flags;
+
+ WARN_ON(!prefix);
+ if (type & debug) {
+ spin_lock_irqsave(&disable_ratelimit_lock, flags);
+ if (!disable_ratelimit && debug_ratelimit && !printk_ratelimit()) {
+ spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&disable_ratelimit_lock, flags);
+
+ len = snprintf(s, 256, KERN_DEBUG "%s: ", prefix);
+
+ va_start(args, fmt);
+ len += vsnprintf(&s[len], (256 - len), fmt, args);
+ va_end(args);
+
+ printk(s);
+
+ WARN_ON(len < 5);
+ }
+}
+EXPORT_SYMBOL(cpufreq_debug_printk);
+
+
+module_param(debug, uint, 0644);
+MODULE_PARM_DESC(debug, "CPUfreq debugging: add 1 to debug core, 2 to debug drivers, and 4 to debug governors.");
+
+module_param(debug_ratelimit, uint, 0644);
+MODULE_PARM_DESC(debug_ratelimit, "CPUfreq debugging: set to 0 to disable ratelimiting.");
+
+#else /* !CONFIG_CPU_FREQ_DEBUG */
+
+static inline void cpufreq_debug_enable_ratelimit(void) { return; }
+static inline void cpufreq_debug_disable_ratelimit(void) { return; }
+
+#endif /* CONFIG_CPU_FREQ_DEBUG */
+