linux-kernel - [PATCH v3 53/57] perf: Simplify perf_event_sysfs

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Message-ID: <20230612093541.382527855@infradead.org>
Date:   Mon, 12 Jun 2023 11:08:06 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     torvalds@...ux-foundation.org, keescook@...omium.org,
        gregkh@...uxfoundation.org, pbonzini@...hat.com
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Subject: [PATCH v3 53/57] perf: Simplify perf_event_sysfs_init()


Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/events/core.c |   10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -13503,11 +13503,11 @@ static int __init perf_event_sysfs_init(
 	struct pmu *pmu;
 	int ret;
 
-	mutex_lock(&pmus_lock);
+	guard(mutex)(&pmus_lock);
 
 	ret = bus_register(&pmu_bus);
 	if (ret)
-		goto unlock;
+		return ret;
 
 	list_for_each_entry(pmu, &pmus, entry) {
 		if (pmu->dev)
@@ -13517,12 +13517,8 @@ static int __init perf_event_sysfs_init(
 		WARN(ret, "Failed to register pmu: %s, reason %d\n", pmu->name, ret);
 	}
 	pmu_bus_running = 1;
-	ret = 0;
 
-unlock:
-	mutex_unlock(&pmus_lock);
-
-	return ret;
+	return 0;
 }
 device_initcall(perf_event_sysfs_init);