perf/core: Use lockdep to assert IRQs are disabled/enabled

Use lockdep to check that IRQs are enabled or disabled as expected. This
way the sanity check only shows overhead when concurrency correctness
debug code is enabled.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S . Miller <davem@davemloft.net>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1509980490-4285-9-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/events/core.c b/kernel/events/core.c
index b315aebbcc3fa2fd197ce875a0e8fccb1b58960e..c298847d4b85bc54bf3ba33c82dea9fbb7dae666 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -209,7 +209,7 @@ static int event_function(void *info)
        struct perf_event_context *task_ctx = cpuctx->task_ctx;
        int ret = 0;
 
-       WARN_ON_ONCE(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        perf_ctx_lock(cpuctx, task_ctx);
        /*
@@ -306,7 +306,7 @@ static void event_function_local(struct perf_event *event, event_f func, void *d
        struct task_struct *task = READ_ONCE(ctx->task);
        struct perf_event_context *task_ctx = NULL;
 
-       WARN_ON_ONCE(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        if (task) {
                if (task == TASK_TOMBSTONE)
@@ -1006,7 +1006,7 @@ static enum hrtimer_restart perf_mux_hrtimer_handler(struct hrtimer *hr)
        struct perf_cpu_context *cpuctx;
        int rotations = 0;
 
-       WARN_ON(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        cpuctx = container_of(hr, struct perf_cpu_context, hrtimer);
        rotations = perf_rotate_context(cpuctx);
@@ -1093,7 +1093,7 @@ static void perf_event_ctx_activate(struct perf_event_context *ctx)
 {
        struct list_head *head = this_cpu_ptr(&active_ctx_list);
 
-       WARN_ON(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        WARN_ON(!list_empty(&ctx->active_ctx_list));
 
@@ -1102,7 +1102,7 @@ static void perf_event_ctx_activate(struct perf_event_context *ctx)
 
 static void perf_event_ctx_deactivate(struct perf_event_context *ctx)
 {
-       WARN_ON(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        WARN_ON(list_empty(&ctx->active_ctx_list));
 
@@ -3523,7 +3523,7 @@ void perf_event_task_tick(void)
        struct perf_event_context *ctx, *tmp;
        int throttled;
 
-       WARN_ON(!irqs_disabled());
+       lockdep_assert_irqs_disabled();
 
        __this_cpu_inc(perf_throttled_seq);
        throttled = __this_cpu_xchg(perf_throttled_count, 0);