Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / events / core.c

diff --git a/kernel/events/core.c b/kernel/events/core.c
index cda3ebd..dbccf83 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -372,6 +372,8 @@ void perf_cgroup_switch(struct task_struct *task, int mode)
 
        list_for_each_entry_rcu(pmu, &pmus, entry) {
                cpuctx = this_cpu_ptr(pmu->pmu_cpu_context);
+               if (cpuctx->unique_pmu != pmu)
+                       continue; /* ensure we process each cpuctx once */
 
                /*
                 * perf_cgroup_events says at least one
@@ -395,9 +397,10 @@ void perf_cgroup_switch(struct task_struct *task, int mode)
 
                        if (mode & PERF_CGROUP_SWIN) {
                                WARN_ON_ONCE(cpuctx->cgrp);
-                               /* set cgrp before ctxsw in to
-                                * allow event_filter_match() to not
-                                * have to pass task around
+                               /*
+                                * set cgrp before ctxsw in to allow
+                                * event_filter_match() to not have to pass
+                                * task around
                                 */
                                cpuctx->cgrp = perf_cgroup_from_task(task);
                                cpu_ctx_sched_in(cpuctx, EVENT_ALL, task);
@@ -4412,7 +4415,7 @@ static void perf_event_task_event(struct perf_task_event *task_event)
        rcu_read_lock();
        list_for_each_entry_rcu(pmu, &pmus, entry) {
                cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-               if (cpuctx->active_pmu != pmu)
+               if (cpuctx->unique_pmu != pmu)
                        goto next;
                perf_event_task_ctx(&cpuctx->ctx, task_event);
 
@@ -4558,7 +4561,7 @@ static void perf_event_comm_event(struct perf_comm_event *comm_event)
        rcu_read_lock();
        list_for_each_entry_rcu(pmu, &pmus, entry) {
                cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-               if (cpuctx->active_pmu != pmu)
+               if (cpuctx->unique_pmu != pmu)
                        goto next;
                perf_event_comm_ctx(&cpuctx->ctx, comm_event);
 
@@ -4754,7 +4757,7 @@ got_name:
        rcu_read_lock();
        list_for_each_entry_rcu(pmu, &pmus, entry) {
                cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-               if (cpuctx->active_pmu != pmu)
+               if (cpuctx->unique_pmu != pmu)
                        goto next;
                perf_event_mmap_ctx(&cpuctx->ctx, mmap_event,
                                        vma->vm_flags & VM_EXEC);
@@ -5855,8 +5858,8 @@ static void update_pmu_context(struct pmu *pmu, struct pmu *old_pmu)
 
                cpuctx = per_cpu_ptr(pmu->pmu_cpu_context, cpu);
 
-               if (cpuctx->active_pmu == old_pmu)
-                       cpuctx->active_pmu = pmu;
+               if (cpuctx->unique_pmu == old_pmu)
+                       cpuctx->unique_pmu = pmu;
        }
 }
 
@@ -5991,7 +5994,7 @@ skip_type:
                cpuctx->ctx.pmu = pmu;
                cpuctx->jiffies_interval = 1;
                INIT_LIST_HEAD(&cpuctx->rotation_list);
-               cpuctx->active_pmu = pmu;
+               cpuctx->unique_pmu = pmu;
        }
 
 got_cpu_context: