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

Pull arm64 fixes from Catalin Marinas:

 - Deselect ARCH_CORRECT_STACKTRACE_ON_KRETPROBE so that tests depending
   on it don't run (and fail) on arm64

 - Fix lockdep assert in the Arm SMMUv3 PMU driver

 - Fix the port and device ID bits setting in the Arm CMN perf driver

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  perf/arm-cmn: Ensure port and device id bits are set properly
  perf/arm-smmuv3: Fix lockdep assert in ->event_init()
  arm64: disable ARCH_CORRECT_STACKTRACE_ON_KRETPROBE tests

Author: torvalds

arch/arm64/Kconfig

@@ -14,7 +14,6 @@ config ARM64
 	select ARCH_HAS_DEBUG_WX
 	select ARCH_BINFMT_ELF_EXTRA_PHDRS
 	select ARCH_BINFMT_ELF_STATE
-	select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
 	select ARCH_ENABLE_MEMORY_HOTPLUG
 	select ARCH_ENABLE_MEMORY_HOTREMOVE

drivers/perf/arm-cmn.c

@@ -2178,8 +2178,6 @@ static int arm_cmn_init_dtcs(struct arm_cmn *cmn)
 			continue;
 
 		xp = arm_cmn_node_to_xp(cmn, dn);
-		dn->portid_bits = xp->portid_bits;
-		dn->deviceid_bits = xp->deviceid_bits;
 		dn->dtc = xp->dtc;
 		dn->dtm = xp->dtm;
 		if (cmn->multi_dtm)
@@ -2420,6 +2418,8 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset)
 			}
 
 			arm_cmn_init_node_info(cmn, reg & CMN_CHILD_NODE_ADDR, dn);
+			dn->portid_bits = xp->portid_bits;
+			dn->deviceid_bits = xp->deviceid_bits;
 
 			switch (dn->type) {
 			case CMN_TYPE_DTC:

drivers/perf/arm_smmuv3_pmu.c

@@ -431,6 +431,17 @@ static int smmu_pmu_event_init(struct perf_event *event)
 			return -EINVAL;
 	}
 
+	/*
+	 * Ensure all events are on the same cpu so all events are in the
+	 * same cpu context, to avoid races on pmu_enable etc.
+	 */
+	event->cpu = smmu_pmu->on_cpu;
+
+	hwc->idx = -1;
+
+	if (event->group_leader == event)
+		return 0;
+
 	for_each_sibling_event(sibling, event->group_leader) {
 		if (is_software_event(sibling))
 			continue;
@@ -442,14 +453,6 @@ static int smmu_pmu_event_init(struct perf_event *event)
 			return -EINVAL;
 	}
 
-	hwc->idx = -1;
-
-	/*
-	 * Ensure all events are on the same cpu so all events are in the
-	 * same cpu context, to avoid races on pmu_enable etc.
-	 */
-	event->cpu = smmu_pmu->on_cpu;
-
 	return 0;
 }