Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - support for nr_cpus= command line argument (maxcpus was previously
   changed to allow secondary CPUs to be hot-plugged)

 - ARM PMU interrupt handling fix

 - fix potential TLB conflict in the hibernate code

 - improved handling of EL1 instruction aborts (better error reporting)

 - removal of useless jprobes code for stack saving/restoring

 - defconfig updates

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: defconfig: enable CONFIG_LOCALVERSION_AUTO
  arm64: defconfig: add options for virtualization and containers
  arm64: hibernate: handle allocation failures
  arm64: hibernate: avoid potential TLB conflict
  arm64: Handle el1 synchronous instruction aborts cleanly
  arm64: Remove stack duplicating code from jprobes
  drivers/perf: arm-pmu: Fix handling of SPI lacking "interrupt-affinity" property
  drivers/perf: arm-pmu: convert arm_pmu_mutex to spinlock
  arm64: Support hard limit of cpu count by nr_cpus

1 files changed, 13 insertions, 12 deletions

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index 6ccb994bdfcb..c494613c1909 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -688,7 +688,7 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
 	return 0;
 }
 
-static DEFINE_MUTEX(arm_pmu_mutex);
+static DEFINE_SPINLOCK(arm_pmu_lock);
 static LIST_HEAD(arm_pmu_list);
 
 /*
@@ -701,7 +701,7 @@ static int arm_perf_starting_cpu(unsigned int cpu)
 {
 	struct arm_pmu *pmu;
 
-	mutex_lock(&arm_pmu_mutex);
+	spin_lock(&arm_pmu_lock);
 	list_for_each_entry(pmu, &arm_pmu_list, entry) {
 
 		if (!cpumask_test_cpu(cpu, &pmu->supported_cpus))
@@ -709,7 +709,7 @@ static int arm_perf_starting_cpu(unsigned int cpu)
 		if (pmu->reset)
 			pmu->reset(pmu);
 	}
-	mutex_unlock(&arm_pmu_mutex);
+	spin_unlock(&arm_pmu_lock);
 	return 0;
 }
 
@@ -821,9 +821,9 @@ static int cpu_pmu_init(struct arm_pmu *cpu_pmu)
 	if (!cpu_hw_events)
 		return -ENOMEM;
 
-	mutex_lock(&arm_pmu_mutex);
+	spin_lock(&arm_pmu_lock);
 	list_add_tail(&cpu_pmu->entry, &arm_pmu_list);
-	mutex_unlock(&arm_pmu_mutex);
+	spin_unlock(&arm_pmu_lock);
 
 	err = cpu_pm_pmu_register(cpu_pmu);
 	if (err)
@@ -859,9 +859,9 @@ static int cpu_pmu_init(struct arm_pmu *cpu_pmu)
 	return 0;
 
 out_unregister:
-	mutex_lock(&arm_pmu_mutex);
+	spin_lock(&arm_pmu_lock);
 	list_del(&cpu_pmu->entry);
-	mutex_unlock(&arm_pmu_mutex);
+	spin_unlock(&arm_pmu_lock);
 	free_percpu(cpu_hw_events);
 	return err;
 }
@@ -869,9 +869,9 @@ out_unregister:
 static void cpu_pmu_destroy(struct arm_pmu *cpu_pmu)
 {
 	cpu_pm_pmu_unregister(cpu_pmu);
-	mutex_lock(&arm_pmu_mutex);
+	spin_lock(&arm_pmu_lock);
 	list_del(&cpu_pmu->entry);
-	mutex_unlock(&arm_pmu_mutex);
+	spin_unlock(&arm_pmu_lock);
 	free_percpu(cpu_pmu->hw_events);
 }
 
@@ -967,11 +967,12 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
 
 	/* If we didn't manage to parse anything, try the interrupt affinity */
 	if (cpumask_weight(&pmu->supported_cpus) == 0) {
-		if (!using_spi) {
+		int irq = platform_get_irq(pdev, 0);
+
+		if (irq_is_percpu(irq)) {
 			/* If using PPIs, check the affinity of the partition */
-			int ret, irq;
+			int ret;
 
-			irq = platform_get_irq(pdev, 0);
 			ret = irq_get_percpu_devid_partition(irq, &pmu->supported_cpus);
 			if (ret) {
 				kfree(irqs);