From: Sebastian Andrzej Siewior Date: Wed, 15 Nov 2017 17:29:51 +0100 Subject: [PATCH 097/351] time/hrtimer: avoid schedule_work() with interrupts disabled Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=6226cda643b8168dc02c740131337f68dd450370 The NOHZ code tries to schedule a workqueue with interrupts disabled. Since this does not work -RT I am switching it to swork instead. Signed-off-by: Sebastian Andrzej Siewior --- kernel/time/timer.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 0043bf8e2c90..3cb79167852f 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -218,8 +218,7 @@ static DEFINE_PER_CPU(struct timer_base, timer_bases[NR_BASES]); static DEFINE_STATIC_KEY_FALSE(timers_nohz_active); static DEFINE_MUTEX(timer_keys_mutex); -static void timer_update_keys(struct work_struct *work); -static DECLARE_WORK(timer_update_work, timer_update_keys); +static struct swork_event timer_update_swork; #ifdef CONFIG_SMP unsigned int sysctl_timer_migration = 1; @@ -237,7 +236,7 @@ static void timers_update_migration(void) static inline void timers_update_migration(void) { } #endif /* !CONFIG_SMP */ -static void timer_update_keys(struct work_struct *work) +static void timer_update_keys(struct swork_event *event) { mutex_lock(&timer_keys_mutex); timers_update_migration(); @@ -247,9 +246,17 @@ static void timer_update_keys(struct work_struct *work) void timers_update_nohz(void) { - schedule_work(&timer_update_work); + swork_queue(&timer_update_swork); } +static __init int hrtimer_init_thread(void) +{ + WARN_ON(swork_get()); + INIT_SWORK(&timer_update_swork, timer_update_keys); + return 0; +} +early_initcall(hrtimer_init_thread); + int timer_migration_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos)