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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-06-11 11:08:10 +0200 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-28 09:32:25 +0200 |
commit | 2764196f45be5efe1c9e71bf766ef6291ee86339 (patch) | |
tree | 951c71b7bebac978a2efd5f0f22826f560321888 | |
parent | 93dd49d0028c66be9f0404d23dd6817b876cc6dc (diff) | |
download | linux-2764196f45be5efe1c9e71bf766ef6291ee86339.tar.bz2 |
s390/perf: remove perf_release/reserver_sampling functions
Now that the oprofile sampling code is gone there is only one user of
the sampling facility left. Therefore the reserve and release
functions can be removed.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-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 1f7ff85c5e4c..c64c0befd3f3 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 a8e832166417..9ea26dface38 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 87035fa58bbe..17431f63de00 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); |