| Message ID | 20220613182447.112191-3-bigeasy@linutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm: Disable two features which are not compatible with PREEMPT_RT | expand |
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 5c6f8d11a3ce5..034cb48c9eeb8 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -70,6 +70,7 @@ static void __init init_irq_stacks(void) } } +#ifndef CONFIG_PREEMPT_RT static void ____do_softirq(void *arg) { __do_softirq(); @@ -80,7 +81,7 @@ void do_softirq_own_stack(void) call_with_stack(____do_softirq, NULL, __this_cpu_read(irq_stack_ptr)); } - +#endif #endif int arch_show_interrupts(struct seq_file *p, int prec)
PREEMPT_RT preempts softirqs and the current implementation avoids do_softirq_own_stack() and only uses __do_softirq(). Disable the unused softirqs stacks on PREEMPT_RT to safe some memory and ensure that do_softirq_own_stack() is not used which is not expected. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- arch/arm/kernel/irq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)