diff options
| author |   Julia Cartwright <julia@ni.com> | 2019-02-12 17:25:53 +0100 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-02-28 11:18:38 +0100 |
| commit | fe99a4f4d6022ec92f9b52a5528cb9b77513e7d1 (patch) | |
| tree | 87e1bdb98c37e47aab67bf52170fe4a61ca3bde1 /include/linux/kthread.h | |
| parent | sched/fair: Use non-atomic cpumask_{set,clear}_cpu() (diff) | |
| download | linux-dev-fe99a4f4d6022ec92f9b52a5528cb9b77513e7d1.tar.xz linux-dev-fe99a4f4d6022ec92f9b52a5528cb9b77513e7d1.zip | |
kthread: Convert worker lock to raw spinlock
In order to enable the queuing of kthread work items from hardirq context
even when PREEMPT_RT_FULL is enabled, convert the worker spin_lock to a
raw_spin_lock.
This is only acceptable to do because the work performed under the lock is
well-bounded and minimal.
Reported-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Reported-by: Tim Sander <tim@krieglstein.org>
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Link: https://lkml.kernel.org/r/20190212162554.19779-1-bigeasy@linutronix.de
Diffstat (limited to 'include/linux/kthread.h')
| -rw-r--r-- | include/linux/kthread.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/kthread.h b/include/linux/kthread.h index c1961761311d..6b8c064f0cbc 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -85,7 +85,7 @@ enum { struct kthread_worker { unsigned int flags; - spinlock_t lock; + raw_spinlock_t lock; struct list_head work_list; struct list_head delayed_work_list; struct task_struct *task; @@ -106,7 +106,7 @@ struct kthread_delayed_work { }; #define KTHREAD_WORKER_INIT(worker) { \ - .lock = __SPIN_LOCK_UNLOCKED((worker).lock), \ + .lock = __RAW_SPIN_LOCK_UNLOCKED((worker).lock), \ .work_list = LIST_HEAD_INIT((worker).work_list), \ .delayed_work_list = LIST_HEAD_INIT((worker).delayed_work_list),\ } |