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authorPeter Zijlstra (Intel) <peterz@infradead.org>2021-01-18 15:12:22 +0100
committerIngo Molnar <mingo@kernel.org>2021-02-17 14:12:42 +0100
commit40607ee97e4eec5655cc0f76a720bdc4c63a6434 (patch)
tree7f6d888bf7f72306f4cdc986b3e2af6524f30270 /include
parent2c9a98d3bc808717ab63ad928a2b568967775388 (diff)
preempt/dynamic: Provide irqentry_exit_cond_resched() static call
Provide static call to control IRQ preemption (called in CONFIG_PREEMPT) so that we can override its behaviour when preempt= is overriden. Since the default behaviour is full preemption, its call is initialized to provide IRQ preemption when preempt= isn't passed. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lkml.kernel.org/r/20210118141223.123667-8-frederic@kernel.org
Diffstat (limited to 'include')
-rw-r--r--include/linux/entry-common.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index a104b298019a..883acef895bc 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -2,6 +2,7 @@
#ifndef __LINUX_ENTRYCOMMON_H
#define __LINUX_ENTRYCOMMON_H
+#include <linux/static_call_types.h>
#include <linux/tracehook.h>
#include <linux/syscalls.h>
#include <linux/seccomp.h>
@@ -454,6 +455,9 @@ irqentry_state_t noinstr irqentry_enter(struct pt_regs *regs);
* Conditional reschedule with additional sanity checks.
*/
void irqentry_exit_cond_resched(void);
+#ifdef CONFIG_PREEMPT_DYNAMIC
+DECLARE_STATIC_CALL(irqentry_exit_cond_resched, irqentry_exit_cond_resched);
+#endif
/**
* irqentry_exit - Handle return from exception that used irqentry_enter()