Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 42 insertions, 0 deletions

diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
index 8f69d09a41a5..2f007157fab9 100644
--- a/include/linux/ratelimit.h
+++ b/include/linux/ratelimit.h
@@ -36,7 +36,49 @@ static inline void ratelimit_state_init(struct ratelimit_state *rs,
         rs->begin = 0;
 }
 
+extern struct ratelimit_state printk_ratelimit_state;
+
 extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
 #define __ratelimit(state) ___ratelimit(state, __func__)
 
+#ifdef CONFIG_PRINTK
+
+#define WARN_ON_RATELIMIT(condition, state)                     \
+                WARN_ON((condition) && __ratelimit(state))
+
+#define __WARN_RATELIMIT(condition, state, format...)           \
+({                                                              \
+        int rtn = 0;                                            \
+        if (unlikely(__ratelimit(state)))                       \
+                rtn = WARN(condition, format);                  \
+        rtn;                                                    \
+})
+
+#define WARN_RATELIMIT(condition, format...)                    \
+({                                                              \
+        static DEFINE_RATELIMIT_STATE(_rs,                      \
+                                      DEFAULT_RATELIMIT_INTERVAL,       \
+                                      DEFAULT_RATELIMIT_BURST); \
+        __WARN_RATELIMIT(condition, &_rs, format);              \
+})
+
+#else
+
+#define WARN_ON_RATELIMIT(condition, state)                     \
+        WARN_ON(condition)
+
+#define __WARN_RATELIMIT(condition, state, format...)           \
+({                                                              \
+        int rtn = WARN(condition, format);                      \
+        rtn;                                                    \
+})
+
+#define WARN_RATELIMIT(condition, format...)                    \
+({                                                              \
+        int rtn = WARN(condition, format);                      \
+        rtn;                                                    \
+})
+
+#endif
+
 #endif /* _LINUX_RATELIMIT_H */