From fe99a4f4d6022ec92f9b52a5528cb9b77513e7d1 Mon Sep 17 00:00:00 2001 From: Julia Cartwright Date: Tue, 12 Feb 2019 17:25:53 +0100 Subject: 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 Reported-by: Tim Sander Signed-off-by: Julia Cartwright Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Thomas Gleixner Tested-by: Steffen Trumtrar Reviewed-by: Petr Mladek Cc: Guenter Roeck Link: https://lkml.kernel.org/r/20190212162554.19779-1-bigeasy@linutronix.de --- include/linux/kthread.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/kthread.h') 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),\ } -- cgit v1.2.3-59-g8ed1b