---

yaml --- r: 40659 b: refs/heads/master c: f46c483 h: refs/heads/master i: 40657: 36d4c98 40655: 4e09a1c v: v3
git-mirror · Nov 3, 2006 · 168ff46 · 168ff46
1 parent db4528e
commit 168ff46
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Showing 3 changed files with 24 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7f6b8876c7e66b0d15af134e2a5b87e55514eb6d
+refs/heads/master: f46c483357c2d87606bbefb511321e3efd4baae0
diff --git a/trunk/include/linux/kernel.h b/trunk/include/linux/kernel.h
@@ -171,6 +171,8 @@ __attribute_const__ roundup_pow_of_two(unsigned long x)
 
 extern int printk_ratelimit(void);
 extern int __printk_ratelimit(int ratelimit_jiffies, int ratelimit_burst);
+extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
+				unsigned int interval_msec);
 
 static inline void console_silent(void)
 {

diff --git a/trunk/kernel/printk.c b/trunk/kernel/printk.c
@@ -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);