[PATCH 04/10] perf/x86: Use lockdep

[Peter Zijlstra]

Lockdep is very good at finding incorrect IRQ state while locking and
is far better at telling us if we hold a lock than the _is_locked()
API. It also generates less code for the !DEBUG kernels.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 arch/x86/kernel/cpu/perf_event_intel.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -1926,7 +1926,6 @@ intel_start_scheduling(struct cpu_hw_eve
 	 * in stop_event_scheduling()
 	 * makes scheduling appear as a transaction
 	 */
-	WARN_ON_ONCE(!irqs_disabled());
 	raw_spin_lock(&excl_cntrs->lock);
 
 	/*
@@ -2198,7 +2197,7 @@ static void intel_commit_scheduling(stru
 
 	xl = &excl_cntrs->states[tid];
 
-	WARN_ON_ONCE(!raw_spin_is_locked(&excl_cntrs->lock));
+	lockdep_assert_held(&excl_cntrs->lock);
 
 	if (cntr >= 0) {
 		if (c->flags & PERF_X86_EVENT_EXCL)


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