[PATCH RT 6/7] kernel/irq_work: fix non RT case

[Steven Rostedt]

3.18.18-rt16-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

After the deadlock fixed, the checked got somehow away and broke the non-RT
case which could invoke IRQ-work from softirq context.

Cc: stable-rt@xxxxxxxxxxxxxxx
Reported-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 kernel/time/timer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index a29ab1a17023..3a978d000fce 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1452,7 +1452,8 @@ void update_process_times(int user_tick)
 	rcu_check_callbacks(cpu, user_tick);
 
 #if defined(CONFIG_IRQ_WORK) && !defined(CONFIG_PREEMPT_RT_FULL)
-	irq_work_tick();
+	if (in_irq())
+		irq_work_tick();
 #endif
 	run_posix_cpu_timers(p);
 }
-- 
2.1.4


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