diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2016-07-13 19:16:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-14 09:34:36 +0200 |
| commit | a409f5ee2937cb15b4af485fa98b90946d9bea3a (patch) | |
| tree | 2026ed8b98990c9e697215929ef7b8dfaa2b005e | |
| parent | perf/x86/intel/cstate: Convert Intel CSTATE to hotplug state machine (diff) | |
| download | linux-a409f5ee2937cb15b4af485fa98b90946d9bea3a.tar.xz linux-a409f5ee2937cb15b4af485fa98b90946d9bea3a.zip | |
blackfin/perf: Convert hotplug notifier to state machine
Install the callback via the state machine and let the core invoke
the callbacks on the already online CPUs.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Miao <realmz6@gmail.com>
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153334.265797537@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/blackfin/kernel/perf_event.c | 26 | ||||
| -rw-r--r-- | include/linux/cpuhotplug.h | 1 |
2 files changed, 6 insertions, 21 deletions
diff --git a/arch/blackfin/kernel/perf_event.c b/arch/blackfin/kernel/perf_event.c index 170d786807c4..6355e97d22b9 100644 --- a/arch/blackfin/kernel/perf_event.c +++ b/arch/blackfin/kernel/perf_event.c @@ -453,29 +453,13 @@ static struct pmu pmu = { .read = bfin_pmu_read, }; -static void bfin_pmu_setup(int cpu) +static int bfin_pmu_prepare_cpu(unsigned int cpu) { struct cpu_hw_events *cpuhw = &per_cpu(cpu_hw_events, cpu); + bfin_write_PFCTL(0); memset(cpuhw, 0, sizeof(struct cpu_hw_events)); -} - -static int -bfin_pmu_notifier(struct notifier_block *self, unsigned long action, void *hcpu) -{ - unsigned int cpu = (long)hcpu; - - switch (action & ~CPU_TASKS_FROZEN) { - case CPU_UP_PREPARE: - bfin_write_PFCTL(0); - bfin_pmu_setup(cpu); - break; - - default: - break; - } - - return NOTIFY_OK; + return 0; } static int __init bfin_pmu_init(void) @@ -491,8 +475,8 @@ static int __init bfin_pmu_init(void) ret = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW); if (!ret) - perf_cpu_notifier(bfin_pmu_notifier); - + cpuhp_setup_state(CPUHP_PERF_BFIN, "PERF_BFIN", + bfin_pmu_prepare_cpu, NULL); return ret; } early_initcall(bfin_pmu_init); diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 68f4495f4988..d54973e62366 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -9,6 +9,7 @@ enum cpuhp_state { CPUHP_PERF_X86_UNCORE_PREP, CPUHP_PERF_X86_AMD_UNCORE_PREP, CPUHP_PERF_X86_RAPL_PREP, + CPUHP_PERF_BFIN, CPUHP_NOTIFY_PREPARE, CPUHP_BRINGUP_CPU, CPUHP_AP_IDLE_DEAD, |