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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/parisc | |
| parent | b13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 (diff) | |
| download | lwn-f2c5092190f21e02d384f750bcc473554f3aa3f8.tar.gz lwn-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/parisc')
| -rw-r--r-- | arch/parisc/kernel/irq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index 0fe2d79fb123..eba193bcdab1 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -480,10 +480,12 @@ static void execute_on_irq_stack(void *func, unsigned long param1) *irq_stack_in_use = 1; } +#ifndef CONFIG_PREEMPT_RT void do_softirq_own_stack(void) { execute_on_irq_stack(__do_softirq, 0); } +#endif #endif /* CONFIG_IRQSTACKS */ /* ONLY called from entry.S:intr_extint() */ |