Messages in this thread Patch in this message | | | From | madhuparnabhowmik10@gmail ... | Subject | [PATCH RESEND] events:core.c: Use built-in RCU list checking | Date | Fri, 14 Feb 2020 22:14:54 +0530 |
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From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
list_for_each_entry_rcu has built-in RCU and lock checking.
Pass cond argument to list_for_each_entry_rcu() to silence false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled by default.
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> --- kernel/events/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c index 4ff86d57f9e5..04d28f3eb8df 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3760,7 +3760,8 @@ static void perf_adjust_freq_unthr_context(struct perf_event_context *ctx, raw_spin_lock(&ctx->lock); perf_pmu_disable(ctx->pmu); - list_for_each_entry_rcu(event, &ctx->event_list, event_entry) { + list_for_each_entry_rcu(event, &ctx->event_list, event_entry, + lockdep_is_held(&ctx->lock)) { if (event->state != PERF_EVENT_STATE_ACTIVE) continue; -- 2.17.1
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