perf: Clarify perf_cpu_context::active_pmu usage by renaming it to ::unique_pmu

Stephane thought the perf_cpu_context::active_pmu name confusing and
suggested using 'unique_pmu' instead.

This pointer is a pointer to a 'random' pmu sharing the cpuctx
instance, therefore limiting a for_each_pmu loop to those where
cpuctx->unique_pmu matches the pmu we get a loop over unique cpuctx
instances.

Suggested-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-kxyjqpfj2fn9gt7kwu5ag9ks@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 599afc4bb67e..b4166cdfa7a2 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1110,7 +1110,7 @@ struct perf_cpu_context {
         int                             exclusive;
         struct list_head                rotation_list;
         int                             jiffies_interval;
-        struct pmu                      *active_pmu;
+        struct pmu                      *unique_pmu;
         struct perf_cgroup              *cgrp;
 };