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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-16 13:46:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-16 13:46:08 -0700 |
| commit | 1667e630c228ca2e7577de7a404c89de3d9f7772 (patch) | |
| tree | fa314a90bbd2a5a0abe398fcca9813a7742a6f03 | |
| parent | 8a3e4a64849eb9da0e8c7e693978499562581631 (diff) | |
| parent | 27c68c216ee1f1b086e789a64486e6511e380b8a (diff) | |
Merge tag 'perf_urgent_for_v6.5_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Borislav Petkov:
- Fix a lockdep warning when the event given is the first one, no event
group exists yet but the code still goes and iterates over event
siblings
* tag 'perf_urgent_for_v6.5_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Fix lockdep warning in for_each_sibling_event() on SPR
| -rw-r--r-- | arch/x86/events/intel/core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index a149fafad813..2a284ba951b7 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3993,6 +3993,13 @@ static int intel_pmu_hw_config(struct perf_event *event) struct perf_event *leader = event->group_leader; struct perf_event *sibling = NULL; + /* + * When this memload event is also the first event (no group + * exists yet), then there is no aux event before it. + */ + if (leader == event) + return -ENODATA; + if (!is_mem_loads_aux_event(leader)) { for_each_sibling_event(sibling, leader) { if (is_mem_loads_aux_event(sibling)) |