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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2022-06-14 20:18:14 +0200
committerArnd Bergmann <arnd@arndb.de>2022-06-15 17:40:59 +0200
commitf2c5092190f21e02d384f750bcc473554f3aa3f8 (patch)
tree95a6c77231708a982830842ad4b5c4c4982a5608 /arch/parisc
parentb13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 (diff)
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.c2
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() */