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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-05-25 08:05:00 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-08-17 07:26:04 -0700 |
| commit | 7e42776d5ed1fe9a941ed8876c5d15cd7cf5d89f (patch) | |
| tree | 254e896f95ad0aa9e3084645c6779d6b866d6f96 /include/linux/rcupdate.h | |
| parent | rcu: Use timer as backstop for NOCB deferred wakeups (diff) | |
| download | linux-dev-7e42776d5ed1fe9a941ed8876c5d15cd7cf5d89f.tar.xz linux-dev-7e42776d5ed1fe9a941ed8876c5d15cd7cf5d89f.zip | |
rcu: Drive TASKS_RCU directly off of PREEMPT
The actual use of TASKS_RCU is only when PREEMPT, otherwise RCU-sched
is used instead. This commit therefore makes synchronize_rcu_tasks()
and call_rcu_tasks() available always, but mapped to synchronize_sched()
and call_rcu_sched(), respectively, when !PREEMPT. This approach also
allows some #ifdefs to be removed from rcutorture.
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index f816fc72b51e..c3f380befdd7 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -58,8 +58,6 @@ void call_rcu(struct rcu_head *head, rcu_callback_t func); void call_rcu_bh(struct rcu_head *head, rcu_callback_t func); void call_rcu_sched(struct rcu_head *head, rcu_callback_t func); void synchronize_sched(void); -void call_rcu_tasks(struct rcu_head *head, rcu_callback_t func); -void synchronize_rcu_tasks(void); void rcu_barrier_tasks(void); #ifdef CONFIG_PREEMPT_RCU @@ -176,10 +174,14 @@ extern struct srcu_struct tasks_rcu_exit_srcu; rcu_all_qs(); \ rcu_note_voluntary_context_switch_lite(t); \ } while (0) +void call_rcu_tasks(struct rcu_head *head, rcu_callback_t func); +void synchronize_rcu_tasks(void); #else /* #ifdef CONFIG_TASKS_RCU */ #define TASKS_RCU(x) do { } while (0) #define rcu_note_voluntary_context_switch_lite(t) do { } while (0) #define rcu_note_voluntary_context_switch(t) rcu_all_qs() +#define call_rcu_tasks call_rcu_sched +#define synchronize_rcu_tasks synchronize_sched #endif /* #else #ifdef CONFIG_TASKS_RCU */ /** |