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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-08 11:49:24 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-08 11:49:24 -0500 |
| commit | 9446389ef612096704fdf18fa79bab423d4110f0 (patch) | |
| tree | 3e4fda7270be58ae176d20d318e61fb115b325b5 /include/linux/rcupreempt.h | |
| parent | cdd0972945dbcb8ea24db365d9b0e100af2a27bb (diff) | |
| parent | 84c6f6046c5a2189160a8f0dca8b90427bf690ea (diff) | |
Merge commit 'origin' into devel
Diffstat (limited to 'include/linux/rcupreempt.h')
| -rw-r--r-- | include/linux/rcupreempt.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/rcupreempt.h b/include/linux/rcupreempt.h index 60c2a033b19e..01152ed532c8 100644 --- a/include/linux/rcupreempt.h +++ b/include/linux/rcupreempt.h @@ -82,5 +82,27 @@ extern struct rcupreempt_trace *rcupreempt_trace_cpu(int cpu); struct softirq_action; +#ifdef CONFIG_NO_HZ +DECLARE_PER_CPU(long, dynticks_progress_counter); + +static inline void rcu_enter_nohz(void) +{ + __get_cpu_var(dynticks_progress_counter)++; + WARN_ON(__get_cpu_var(dynticks_progress_counter) & 0x1); + mb(); +} + +static inline void rcu_exit_nohz(void) +{ + mb(); + __get_cpu_var(dynticks_progress_counter)++; + WARN_ON(!(__get_cpu_var(dynticks_progress_counter) & 0x1)); +} + +#else /* CONFIG_NO_HZ */ +#define rcu_enter_nohz() do { } while (0) +#define rcu_exit_nohz() do { } while (0) +#endif /* CONFIG_NO_HZ */ + #endif /* __KERNEL__ */ #endif /* __LINUX_RCUPREEMPT_H */ |