diff options
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index d42dbec0608..e8b4039cfb2 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -40,6 +40,7 @@ #include <linux/cpumask.h> #include <linux/seqlock.h> #include <linux/lockdep.h> +#include <linux/completion.h> /** * struct rcu_head - callback structure for use with RCU @@ -168,6 +169,27 @@ struct rcu_head { (p) = (v); \ }) +/* Infrastructure to implement the synchronize_() primitives. */ + +struct rcu_synchronize { + struct rcu_head head; + struct completion completion; +}; + +extern void wakeme_after_rcu(struct rcu_head *head); + +#define synchronize_rcu_xxx(name, func) \ +void name(void) \ +{ \ + struct rcu_synchronize rcu; \ + \ + init_completion(&rcu.completion); \ + /* Will wake me after RCU finished. */ \ + func(&rcu.head, wakeme_after_rcu); \ + /* Wait for it. */ \ + wait_for_completion(&rcu.completion); \ +} + /** * synchronize_sched - block until all CPUs have exited any non-preemptive * kernel code sequences. @@ -224,8 +246,8 @@ extern void call_rcu_bh(struct rcu_head *head, /* Exported common interfaces */ extern void synchronize_rcu(void); extern void rcu_barrier(void); -extern long rcu_batches_completed(void); -extern long rcu_batches_completed_bh(void); +extern void rcu_barrier_bh(void); +extern void rcu_barrier_sched(void); /* Internal to kernel */ extern void rcu_init(void); |