diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/ratelimit.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/ratelimit.h')
-rw-r--r-- | kernel/include/linux/ratelimit.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/kernel/include/linux/ratelimit.h b/kernel/include/linux/ratelimit.h new file mode 100644 index 000000000..181025292 --- /dev/null +++ b/kernel/include/linux/ratelimit.h @@ -0,0 +1,81 @@ +#ifndef _LINUX_RATELIMIT_H +#define _LINUX_RATELIMIT_H + +#include <linux/param.h> +#include <linux/spinlock.h> + +#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ) +#define DEFAULT_RATELIMIT_BURST 10 + +struct ratelimit_state { + raw_spinlock_t lock; /* protect the state */ + + int interval; + int burst; + int printed; + int missed; + unsigned long begin; +}; + +#define RATELIMIT_STATE_INIT(name, interval_init, burst_init) { \ + .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \ + .interval = interval_init, \ + .burst = burst_init, \ + } + +#define RATELIMIT_STATE_INIT_DISABLED \ + RATELIMIT_STATE_INIT(ratelimit_state, 0, DEFAULT_RATELIMIT_BURST) + +#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \ + \ + struct ratelimit_state name = \ + RATELIMIT_STATE_INIT(name, interval_init, burst_init) \ + +static inline void ratelimit_state_init(struct ratelimit_state *rs, + int interval, int burst) +{ + raw_spin_lock_init(&rs->lock); + rs->interval = interval; + rs->burst = burst; + rs->printed = 0; + rs->missed = 0; + 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, format, ...) \ +({ \ + static DEFINE_RATELIMIT_STATE(_rs, \ + DEFAULT_RATELIMIT_INTERVAL, \ + DEFAULT_RATELIMIT_BURST); \ + int rtn = !!(condition); \ + \ + if (unlikely(rtn && __ratelimit(&_rs))) \ + WARN(rtn, format, ##__VA_ARGS__); \ + \ + rtn; \ +}) + +#else + +#define WARN_ON_RATELIMIT(condition, state) \ + WARN_ON(condition) + +#define WARN_RATELIMIT(condition, format, ...) \ +({ \ + int rtn = WARN(condition, format, ##__VA_ARGS__); \ + rtn; \ +}) + +#endif + +#endif /* _LINUX_RATELIMIT_H */ |