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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-29 13:55:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-29 13:55:30 -0700
commita6408f6cb63ac0958fee7dbce7861ffb540d8a49 (patch)
treec94a835d343974171951e3b805e6bbbb02852ebc /arch/xtensa
parent1a81a8f2a5918956e214bb718099a89e500e7ec5 (diff)
parent4fae16dffb812f0e0d98a0b2b0856ca48ca63e6c (diff)
downloadlinux-a6408f6cb63ac0958fee7dbce7861ffb540d8a49.tar.bz2
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/kernel/perf_event.c26
1 files changed, 9 insertions, 17 deletions
diff --git a/arch/xtensa/kernel/perf_event.c b/arch/xtensa/kernel/perf_event.c
index ef90479e0397..0fecc8a2c0b5 100644
--- a/arch/xtensa/kernel/perf_event.c
+++ b/arch/xtensa/kernel/perf_event.c
@@ -404,7 +404,7 @@ static struct pmu xtensa_pmu = {
.read = xtensa_pmu_read,
};
-static void xtensa_pmu_setup(void)
+static int xtensa_pmu_setup(int cpu)
{
unsigned i;
@@ -413,21 +413,7 @@ static void xtensa_pmu_setup(void)
set_er(0, XTENSA_PMU_PMCTRL(i));
set_er(get_er(XTENSA_PMU_PMSTAT(i)), XTENSA_PMU_PMSTAT(i));
}
-}
-
-static int xtensa_pmu_notifier(struct notifier_block *self,
- unsigned long action, void *data)
-{
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- xtensa_pmu_setup();
- break;
-
- default:
- break;
- }
-
- return NOTIFY_OK;
+ return 0;
}
static int __init xtensa_pmu_init(void)
@@ -435,7 +421,13 @@ static int __init xtensa_pmu_init(void)
int ret;
int irq = irq_create_mapping(NULL, XCHAL_PROFILING_INTERRUPT);
- perf_cpu_notifier(xtensa_pmu_notifier);
+ ret = cpuhp_setup_state(CPUHP_AP_PERF_XTENSA_STARTING,
+ "AP_PERF_XTENSA_STARTING", xtensa_pmu_setup,
+ NULL);
+ if (ret) {
+ pr_err("xtensa_pmu: failed to register CPU-hotplug.\n");
+ return ret;
+ }
#if XTENSA_FAKE_NMI
enable_irq(irq);
#else