[PATCH 4/4] printk: Declare printk_ratelimit_state in ratelimit.h

[Namhyung Kim <namhyung@gmail.com>]

Adding declaration of printk_ratelimit_state in ratelimit.h removes
potential build breakage and following sparse warning:

 kernel/printk.c:1426:1: warning: symbol 'printk_ratelimit_state' was not declared. Should it be static?

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
 include/linux/ratelimit.h |    4 ++++
 kernel/sysctl.c           |    2 --
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
index 8f69d09..55e1bbc 100644
--- a/include/linux/ratelimit.h
+++ b/include/linux/ratelimit.h
@@ -36,6 +36,10 @@ static inline void ratelimit_state_init(struct ratelimit_state *rs,
 	rs->begin = 0;
 }
 
+#ifdef CONFIG_PRINTK
+extern struct ratelimit_state printk_ratelimit_state;
+#endif
+
 extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
 #define __ratelimit(state) ___ratelimit(state, __func__)
 
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index f88552c..720ab2b 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -161,8 +161,6 @@ extern int no_unaligned_warning;
 extern int unaligned_dump_stack;
 #endif
 
-extern struct ratelimit_state printk_ratelimit_state;
-
 #ifdef CONFIG_PROC_SYSCTL
 static int proc_do_cad_pid(struct ctl_table *table, int write,
 		  void __user *buffer, size_t *lenp, loff_t *ppos);
-- 
1.7.0.4