Merge branch 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  ratelimit: Make suppressed output messages more useful
  printk: Remove ratelimit.h from kernel.h
  ratelimit: Fix/allow use in atomic contexts
  ratelimit: Use per ratelimit context locking

3 files changed, 25 insertions, 14 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f4e3184fa054..3fa4c590cf12 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -15,7 +15,6 @@
 #include <linux/bitops.h>
 #include <linux/log2.h>
 #include <linux/typecheck.h>
-#include <linux/ratelimit.h>
 #include <linux/dynamic_debug.h>
 #include <asm/byteorder.h>
 #include <asm/bug.h>
@@ -241,8 +240,8 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 asmlinkage int printk(const char * fmt, ...)
 	__attribute__ ((format (printf, 1, 2))) __cold;
 
-extern struct ratelimit_state printk_ratelimit_state;
-extern int printk_ratelimit(void);
+extern int __printk_ratelimit(const char *func);
+#define printk_ratelimit() __printk_ratelimit(__func__)
 extern bool printk_timed_ratelimit(unsigned long *caller_jiffies,
 				   unsigned int interval_msec);
 
diff --git a/include/linux/net.h b/include/linux/net.h
index 529a0931711d..d7e26e30c8c2 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -358,6 +358,7 @@ static const struct proto_ops name##_ops = {			\
 
 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
+#include <linux/ratelimit.h>
 extern struct ratelimit_state net_ratelimit_state;
 #endif
 
diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
index 00044b856453..668cf1bef030 100644
--- a/include/linux/ratelimit.h
+++ b/include/linux/ratelimit.h
@@ -1,20 +1,31 @@
 #ifndef _LINUX_RATELIMIT_H
 #define _LINUX_RATELIMIT_H
+
 #include <linux/param.h>
+#include <linux/spinlock_types.h>
 
-#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
-#define DEFAULT_RATELIMIT_BURST 10
+#define DEFAULT_RATELIMIT_INTERVAL	(5 * HZ)
+#define DEFAULT_RATELIMIT_BURST		10
 
 struct ratelimit_state {
-	int interval;
-	int burst;
-	int printed;
-	int missed;
-	unsigned long begin;
+	spinlock_t	lock;		/* protect the state */
+
+	int		interval;
+	int		burst;
+	int		printed;
+	int		missed;
+	unsigned long	begin;
 };
 
-#define DEFINE_RATELIMIT_STATE(name, interval, burst)		\
-		struct ratelimit_state name = {interval, burst,}
+#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init)		\
+									\
+	struct ratelimit_state name = {					\
+		.lock		= __SPIN_LOCK_UNLOCKED(name.lock),	\
+		.interval	= interval_init,			\
+		.burst		= burst_init,				\
+	}
+
+extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
+#define __ratelimit(state) ___ratelimit(state, __func__)
 
-extern int __ratelimit(struct ratelimit_state *rs);
-#endif
+#endif /* _LINUX_RATELIMIT_H */