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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2022-06-14 21:18:14 +0300
committerArnd Bergmann <arnd@arndb.de>2022-06-15 18:40:59 +0300
commitf2c5092190f21e02d384f750bcc473554f3aa3f8 (patch)
tree95a6c77231708a982830842ad4b5c4c4982a5608 /include/asm-generic
parentb13baccc3850ca8b8cccbf8ed9912dbaa0fdf7f3 (diff)
downloadlinux-f2c5092190f21e02d384f750bcc473554f3aa3f8.tar.xz
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 'include/asm-generic')
-rw-r--r--include/asm-generic/softirq_stack.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/softirq_stack.h b/include/asm-generic/softirq_stack.h
index eceeecf6a5bd..d3e2d81656e0 100644
--- a/include/asm-generic/softirq_stack.h
+++ b/include/asm-generic/softirq_stack.h
@@ -2,7 +2,7 @@
#ifndef __ASM_GENERIC_SOFTIRQ_STACK_H
#define __ASM_GENERIC_SOFTIRQ_STACK_H
-#ifdef CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK
+#if defined(CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK) && !defined(CONFIG_PREEMPT_RT)
void do_softirq_own_stack(void);
#else
static inline void do_softirq_own_stack(void)