diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-12-03 16:25:21 +0100 |
|---|---|---|
| committer | Gary Robertson <gary.robertson@linaro.org> | 2013-10-31 17:59:27 -0700 |
| commit | ce0f6f1ec01cbde905467474eec4c5050df04f3a (patch) | |
| tree | f22b10d900d3dcad78ac3c5bcb6efe2e53b5db55 | |
| parent | 2fcd4115c744022ea32bd66668170820d254065a (diff) | |
rcutiny: Use simple waitqueue
Simple waitqueues can be handled from interrupt disabled contexts.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/rcutiny_plugin.h | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h index 2995b41d84ec..859ff350097c 100644 --- a/kernel/rcutiny_plugin.h +++ b/kernel/rcutiny_plugin.h @@ -26,6 +26,7 @@ #include <linux/module.h> #include <linux/debugfs.h> #include <linux/seq_file.h> +#include <linux/wait-simple.h> /* Global control variables for rcupdate callback mechanism. */ struct rcu_ctrlblk { @@ -308,7 +309,7 @@ static void show_tiny_preempt_stats(struct seq_file *m) /* Controls for rcu_kthread() kthread. */ static struct task_struct *rcu_kthread_task; -static DECLARE_WAIT_QUEUE_HEAD(rcu_kthread_wq); +static DEFINE_SWAIT_HEAD(rcu_kthread_wq); static unsigned long have_rcu_kthread_work; /* @@ -762,7 +763,7 @@ void synchronize_rcu(void) } EXPORT_SYMBOL_GPL(synchronize_rcu); -static DECLARE_WAIT_QUEUE_HEAD(sync_rcu_preempt_exp_wq); +static DEFINE_SWAIT_HEAD(sync_rcu_preempt_exp_wq); static unsigned long sync_rcu_preempt_exp_count; static DEFINE_MUTEX(sync_rcu_preempt_exp_mutex); @@ -784,7 +785,7 @@ static int rcu_preempted_readers_exp(void) */ static void rcu_report_exp_done(void) { - wake_up(&sync_rcu_preempt_exp_wq); + swait_wake(&sync_rcu_preempt_exp_wq); } /* @@ -836,8 +837,8 @@ void synchronize_rcu_expedited(void) } else { rcu_initiate_boost(); local_irq_restore(flags); - wait_event(sync_rcu_preempt_exp_wq, - !rcu_preempted_readers_exp()); + swait_event(sync_rcu_preempt_exp_wq, + !rcu_preempted_readers_exp()); } /* Clean up and exit. */ @@ -907,7 +908,7 @@ static void invoke_rcu_callbacks(void) { have_rcu_kthread_work = 1; if (rcu_kthread_task != NULL) - wake_up(&rcu_kthread_wq); + swait_wake(&rcu_kthread_wq); } #ifdef CONFIG_RCU_TRACE @@ -937,8 +938,8 @@ static int rcu_kthread(void *arg) unsigned long flags; for (;;) { - wait_event_interruptible(rcu_kthread_wq, - have_rcu_kthread_work != 0); + swait_event_interruptible(rcu_kthread_wq, + have_rcu_kthread_work != 0); morework = rcu_boost(); local_irq_save(flags); work = have_rcu_kthread_work; |