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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2022-06-14 20:18:14 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-06-15 17:40:59 +0200 |
| commit | f2c5092190f21e02d384f750bcc473554f3aa3f8 (patch) | |
| tree | 95a6c77231708a982830842ad4b5c4c4982a5608 /arch/s390/include/asm/softirq_stack.h | |
| parent | Linux 5.19-rc2 (diff) | |
| download | linux-f2c5092190f21e02d384f750bcc473554f3aa3f8.tar.xz linux-f2c5092190f21e02d384f750bcc473554f3aa3f8.zip | |
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 <bigeasy@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/s390/include/asm/softirq_stack.h')
| -rw-r--r-- | arch/s390/include/asm/softirq_stack.h | 3 |
1 files changed, 2 insertions, 1 deletions
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 <asm/lowcore.h> #include <asm/stacktrace.h> +#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 */ |