]> pilppa.org Git - linux-2.6-omap-h63xx.git/blobdiff - kernel/printk.c
[PATCH] slab debug and ARCH_SLAB_MINALIGN don't get along
[linux-2.6-omap-h63xx.git] / kernel / printk.c
index f7d427ef50385d70db6a0222ea3c53a0d8738d03..66426552fbfef24e49442ed08f8d595930feca32 100644 (file)
@@ -31,6 +31,7 @@
 #include <linux/security.h>
 #include <linux/bootmem.h>
 #include <linux/syscalls.h>
+#include <linux/jiffies.h>
 
 #include <asm/uaccess.h>
 
@@ -1101,3 +1102,23 @@ int printk_ratelimit(void)
                                printk_ratelimit_burst);
 }
 EXPORT_SYMBOL(printk_ratelimit);
+
+/**
+ * printk_timed_ratelimit - caller-controlled printk ratelimiting
+ * @caller_jiffies: pointer to caller's state
+ * @interval_msecs: minimum interval between prints
+ *
+ * printk_timed_ratelimit() returns true if more than @interval_msecs
+ * milliseconds have elapsed since the last time printk_timed_ratelimit()
+ * returned true.
+ */
+bool printk_timed_ratelimit(unsigned long *caller_jiffies,
+                       unsigned int interval_msecs)
+{
+       if (*caller_jiffies == 0 || time_after(jiffies, *caller_jiffies)) {
+               *caller_jiffies = jiffies + msecs_to_jiffies(interval_msecs);
+               return true;
+       }
+       return false;
+}
+EXPORT_SYMBOL(printk_timed_ratelimit);