From f2c5092190f21e02d384f750bcc473554f3aa3f8 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Tue, 14 Jun 2022 20:18:14 +0200 Subject: arch/*: Disable softirq stacks on PREEMPT_RT. 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 save some memory and ensure that do_softirq_own_stack() is not used bwcause it is not expected. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Arnd Bergmann --- arch/s390/include/asm/softirq_stack.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/s390/include') diff --git a/arch/s390/include/asm/softirq_stack.h b/arch/s390/include/asm/softirq_stack.h index fd17f25704bd..af68d6c1d584 100644 --- a/arch/s390/include/asm/softirq_stack.h +++ b/arch/s390/include/asm/softirq_stack.h @@ -5,9 +5,10 @@ #include #include +#ifndef CONFIG_PREEMPT_RT static inline void do_softirq_own_stack(void) { call_on_stack(0, S390_lowcore.async_stack, void, __do_softirq); } - +#endif #endif /* __ASM_S390_SOFTIRQ_STACK_H */ -- cgit v1.2.3-59-g8ed1b