diff options
| author | Paul E. McKenney | 2015-05-30 10:11:24 -0700 |
|---|---|---|
| committer | Paul E. McKenney | 2015-07-22 15:26:58 -0700 |
| commit | 24560056de61d86153cecb84d04e4237437f5888 (patch) | |
| tree | 4674113128e446afb740fcc1d45d7fbd64dcff1f /include | |
| parent | f765d1130700878c2275bc1ea09eed428f870a2a (diff) | |
rcu: Add RCU-sched flavors of get-state and cond-sync
The get_state_synchronize_rcu() and cond_synchronize_rcu() functions
allow polling for grace-period completion, with an actual wait for a
grace period occurring only when cond_synchronize_rcu() is called too
soon after the corresponding get_state_synchronize_rcu(). However,
these functions work only for vanilla RCU. This commit adds the
get_state_synchronize_sched() and cond_synchronize_sched(), which provide
the same capability for RCU-sched.
Reported-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/rcutiny.h | 10 | ||||
| -rw-r--r-- | include/linux/rcutree.h | 2 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/rcutiny.h b/include/linux/rcutiny.h index 3df6c1ec4e25..ff968b7af3a4 100644 --- a/include/linux/rcutiny.h +++ b/include/linux/rcutiny.h @@ -37,6 +37,16 @@ static inline void cond_synchronize_rcu(unsigned long oldstate) might_sleep(); } +static inline unsigned long get_state_synchronize_sched(void) +{ + return 0; +} + +static inline void cond_synchronize_sched(unsigned long oldstate) +{ + might_sleep(); +} + static inline void rcu_barrier_bh(void) { wait_rcu_gp(call_rcu_bh); diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h index 456879143f89..5abec82f325e 100644 --- a/include/linux/rcutree.h +++ b/include/linux/rcutree.h @@ -76,6 +76,8 @@ void rcu_barrier_bh(void); void rcu_barrier_sched(void); unsigned long get_state_synchronize_rcu(void); void cond_synchronize_rcu(unsigned long oldstate); +unsigned long get_state_synchronize_sched(void); +void cond_synchronize_sched(unsigned long oldstate); extern unsigned long rcutorture_testseq; extern unsigned long rcutorture_vernum; |