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53 lines
1.7 KiB
Diff
53 lines
1.7 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Wed, 15 Nov 2017 17:29:51 +0100
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Subject: [PATCH] time/hrtimer: avoid schedule_work() with interrupts disabled
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The NOHZ code tries to schedule a workqueue with interrupts disabled.
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Since this does not work -RT I am switching it to swork instead.
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/time/timer.c | 15 +++++++++++----
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1 file changed, 11 insertions(+), 4 deletions(-)
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--- a/kernel/time/timer.c
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+++ b/kernel/time/timer.c
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@@ -217,8 +217,7 @@ static DEFINE_PER_CPU(struct timer_base,
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static DEFINE_STATIC_KEY_FALSE(timers_nohz_active);
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static DEFINE_MUTEX(timer_keys_mutex);
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-static void timer_update_keys(struct work_struct *work);
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-static DECLARE_WORK(timer_update_work, timer_update_keys);
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+static struct swork_event timer_update_swork;
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#ifdef CONFIG_SMP
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unsigned int sysctl_timer_migration = 1;
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@@ -238,7 +237,7 @@ static void timers_update_migration(void
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static inline void timers_update_migration(void) { }
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#endif /* !CONFIG_SMP */
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-static void timer_update_keys(struct work_struct *work)
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+static void timer_update_keys(struct swork_event *event)
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{
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mutex_lock(&timer_keys_mutex);
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timers_update_migration();
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@@ -248,9 +247,17 @@ static void timer_update_keys(struct wor
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void timers_update_nohz(void)
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{
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- schedule_work(&timer_update_work);
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+ swork_queue(&timer_update_swork);
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}
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+static __init int hrtimer_init_thread(void)
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+{
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+ WARN_ON(swork_get());
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+ INIT_SWORK(&timer_update_swork, timer_update_keys);
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+ return 0;
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+}
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+early_initcall(hrtimer_init_thread);
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+
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int timer_migration_handler(struct ctl_table *table, int write,
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void __user *buffer, size_t *lenp,
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loff_t *ppos)
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