From: Sebastian Andrzej Siewior Date: Tue, 9 Feb 2016 18:17:18 +0100 Subject: kernel: softirq: unlock with irqs on Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.14/older/patches-4.14.1-rt3.tar.xz We unlock the lock while the interrupts are off. This isn't a problem now but will get because the migrate_disable() + enable are not symmetrical in regard to the status of interrupts. Signed-off-by: Sebastian Andrzej Siewior --- kernel/softirq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -560,8 +560,10 @@ static void do_current_softirqs(void) do_single_softirq(i); } softirq_clr_runner(i); - unlock_softirq(i); WARN_ON(current->softirq_nestcnt != 1); + local_irq_enable(); + unlock_softirq(i); + local_irq_disable(); } }