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s390: Support PREEMPT_DYNAMIC

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Select HAVE_PREEMPT_DYNAMIC_KEY and add the pieces which are required to
support PREEMPT_DYNAMIC.

See commit 99cf983cc8 ("sched/preempt: Add PREEMPT_DYNAMIC using static
keys") and commit 1b2d3451ee ("arm64: Support PREEMPT_DYNAMIC") for more
details.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-11-27 17:17:12 +01:00
parent c4a585e952
commit b5f463486b
2 changed files with 19 additions and 4 deletions
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1
arch/s390/Kconfig
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@ -219,6 +219,7 @@ config S390
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_PREEMPT_DYNAMIC_KEY
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE
select HAVE_RETHOOK

22
arch/s390/include/asm/preempt.h
View File

@ -130,10 +130,24 @@ static __always_inline bool should_resched(int preempt_offset)
#define init_idle_preempt_count(p, cpu) do { } while (0)
#ifdef CONFIG_PREEMPTION
extern void preempt_schedule(void);
#define __preempt_schedule() preempt_schedule()
extern void preempt_schedule_notrace(void);
#define __preempt_schedule_notrace() preempt_schedule_notrace()
void preempt_schedule(void);
void preempt_schedule_notrace(void);
#ifdef CONFIG_PREEMPT_DYNAMIC
void dynamic_preempt_schedule(void);
void dynamic_preempt_schedule_notrace(void);
#define __preempt_schedule() dynamic_preempt_schedule()
#define __preempt_schedule_notrace() dynamic_preempt_schedule_notrace()
#else /* CONFIG_PREEMPT_DYNAMIC */
#define __preempt_schedule() preempt_schedule()
#define __preempt_schedule_notrace() preempt_schedule_notrace()
#endif /* CONFIG_PREEMPT_DYNAMIC */
#endif /* CONFIG_PREEMPTION */
#endif /* __ASM_PREEMPT_H */