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perf/core: Remove perf_event::group_entry

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Now that all the grouping is done with RB trees, we no longer need
group_entry and can replace the whole thing with sibling_list.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Carrillo-Cisneros <davidcc@google.com>
Cc: Dmitri Prokhorov <Dmitry.Prohorov@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Valery Cherepennikov <valery.cherepennikov@intel.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra
2017-11-13 14:28:33 +01:00
committed by Ingo Molnar
parent 1cac7b1ae3
commit 8343aae661
19 changed files with 36 additions and 43 deletions
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5
include/linux/perf_event.h
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@@ -549,14 +549,9 @@ struct perf_event {
struct list_head event_entry;
/*
* XXX: group_entry and sibling_list should be mutually exclusive;
* either you're a sibling on a group, or you're the group leader.
* Rework the code to always use the same list element.
*
* Locked for modification by both ctx->mutex and ctx->lock; holding
* either sufficies for read.
*/
struct list_head group_entry;
struct list_head sibling_list;
/*
* Node on the pinned or flexible tree located at the event context;