diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/s390/include/asm/perf_event.h | 12 | ||||
-rw-r--r-- | arch/s390/kernel/perf_cpum_sf.c | 5 | ||||
-rw-r--r-- | arch/s390/kernel/perf_event.c | 30 |
3 files changed, 0 insertions, 47 deletions
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h index 1f7ff85..c64c0be 100644 --- a/arch/s390/include/asm/perf_event.h +++ b/arch/s390/include/asm/perf_event.h @@ -86,16 +86,4 @@ struct sf_raw_sample { u8 padding[]; /* Padding to next multiple of 8 */ } __packed; -/* Perf hardware reserve and release functions */ -#ifdef CONFIG_PERF_EVENTS -int perf_reserve_sampling(void); -void perf_release_sampling(void); -#else /* CONFIG_PERF_EVENTS */ -static inline int perf_reserve_sampling(void) -{ - return 0; -} -static inline void perf_release_sampling(void) {} -#endif /* CONFIG_PERF_EVENTS */ - #endif /* _ASM_S390_PERF_EVENT_H */ diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c index a8e8321..9ea26df 100644 --- a/arch/s390/kernel/perf_cpum_sf.c +++ b/arch/s390/kernel/perf_cpum_sf.c @@ -601,17 +601,12 @@ static void release_pmc_hardware(void) irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT); on_each_cpu(setup_pmc_cpu, &flags, 1); - perf_release_sampling(); } static int reserve_pmc_hardware(void) { int flags = PMC_INIT; - int err; - err = perf_reserve_sampling(); - if (err) - return err; on_each_cpu(setup_pmc_cpu, &flags, 1); if (flags & PMC_FAILURE) { release_pmc_hardware(); diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c index 87035fa..17431f6 100644 --- a/arch/s390/kernel/perf_event.c +++ b/arch/s390/kernel/perf_event.c @@ -248,33 +248,3 @@ ssize_t cpumf_events_sysfs_show(struct device *dev, return sprintf(page, "event=0x%04llx,name=%s\n", pmu_attr->id, attr->attr.name); } - -/* Reserve/release functions for sharing perf hardware */ -static DEFINE_SPINLOCK(perf_hw_owner_lock); -static void *perf_sampling_owner; - -int perf_reserve_sampling(void) -{ - int err; - - err = 0; - spin_lock(&perf_hw_owner_lock); - if (perf_sampling_owner) { - pr_warn("The sampling facility is already reserved by %p\n", - perf_sampling_owner); - err = -EBUSY; - } else - perf_sampling_owner = __builtin_return_address(0); - spin_unlock(&perf_hw_owner_lock); - return err; -} -EXPORT_SYMBOL(perf_reserve_sampling); - -void perf_release_sampling(void) -{ - spin_lock(&perf_hw_owner_lock); - WARN_ON(!perf_sampling_owner); - perf_sampling_owner = NULL; - spin_unlock(&perf_hw_owner_lock); -} -EXPORT_SYMBOL(perf_release_sampling); |