From ea09ce2ccce72c0a8abbd8c5971aee290b24b222 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 21 Aug 2013 17:48:46 +0200 Subject: [PATCH 269/319] genirq: Do not invoke the affinity callback via a workqueue on RT Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.106-rt44.tar.xz [ Upstream commit 2122adbe011cdc0eb62ad62494e181005b23c76a ] Joe Korty reported, that __irq_set_affinity_locked() schedules a workqueue while holding a rawlock which results in a might_sleep() warning. This patch uses swork_queue() instead. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Steven Rostedt (VMware) --- include/linux/interrupt.h | 5 ++--- kernel/irq/manage.c | 19 ++++--------------- 2 files changed, 6 insertions(+), 18 deletions(-) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 72333899f043..a9321f6429f2 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -13,7 +13,7 @@ #include #include #include -#include +#include #include #include @@ -228,7 +228,6 @@ extern void resume_device_irqs(void); * struct irq_affinity_notify - context for notification of IRQ affinity changes * @irq: Interrupt to which notification applies * @kref: Reference count, for internal use - * @swork: Swork item, for internal use * @work: Work item, for internal use * @notify: Function to be called on change. This will be * called in process context. @@ -241,7 +240,7 @@ struct irq_affinity_notify { unsigned int irq; struct kref kref; #ifdef CONFIG_PREEMPT_RT_BASE - struct swork_event swork; + struct kthread_work work; #else struct work_struct work; #endif diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index ce86341a9e19..d5539e04e00a 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -287,7 +287,7 @@ int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask, kref_get(&desc->affinity_notify->kref); #ifdef CONFIG_PREEMPT_RT_BASE - swork_queue(&desc->affinity_notify->swork); + kthread_schedule_work(&desc->affinity_notify->work); #else schedule_work(&desc->affinity_notify->work); #endif @@ -352,21 +352,11 @@ static void _irq_affinity_notify(struct irq_affinity_notify *notify) } #ifdef CONFIG_PREEMPT_RT_BASE -static void init_helper_thread(void) -{ - static int init_sworker_once; - - if (init_sworker_once) - return; - if (WARN_ON(swork_get())) - return; - init_sworker_once = 1; -} -static void irq_affinity_notify(struct swork_event *swork) +static void irq_affinity_notify(struct kthread_work *work) { struct irq_affinity_notify *notify = - container_of(swork, struct irq_affinity_notify, swork); + container_of(work, struct irq_affinity_notify, work); _irq_affinity_notify(notify); } @@ -409,8 +399,7 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify) notify->irq = irq; kref_init(¬ify->kref); #ifdef CONFIG_PREEMPT_RT_BASE - INIT_SWORK(¬ify->swork, irq_affinity_notify); - init_helper_thread(); + kthread_init_work(¬ify->work, irq_affinity_notify); #else INIT_WORK(¬ify->work, irq_affinity_notify); #endif -- 2.25.0