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Message-ID: <20230823141558.957526-1-Naresh.Solanki@9elements.com>
Date: Wed, 23 Aug 2023 16:15:57 +0200
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
Cc: zev@...ilderbeest.net,
Naresh Solanki <Naresh.Solanki@...ements.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: userspace-consumer: Use atomic operation
Replace mutexes with atomic operations.
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
drivers/regulator/userspace-consumer.c | 13 +++----------
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git a/drivers/regulator/userspace-consumer.c b/drivers/regulator/userspace-consumer.c
index a0b980022993..a86714bd32fd 100644
--- a/drivers/regulator/userspace-consumer.c
+++ b/drivers/regulator/userspace-consumer.c
@@ -32,7 +32,7 @@ struct userspace_consumer_data {
struct kobject *kobj;
struct notifier_block nb;
- unsigned long events;
+ atomic_long_t events;
};
static ssize_t name_show(struct device *dev,
@@ -99,12 +99,7 @@ static ssize_t events_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct userspace_consumer_data *data = dev_get_drvdata(dev);
- unsigned long e;
-
- mutex_lock(&events_lock);
- e = data->events;
- data->events = 0;
- mutex_unlock(&events_lock);
+ unsigned long e = atomic_long_xchg(&data->events, 0);
return sprintf(buf, "0x%lx\n", e);
}
@@ -144,9 +139,7 @@ static int regulator_userspace_notify(struct notifier_block *nb,
struct userspace_consumer_data *data =
container_of(nb, struct userspace_consumer_data, nb);
- mutex_lock(&events_lock);
- data->events |= event;
- mutex_unlock(&events_lock);
+ atomic_long_or(event, &data->events);
sysfs_notify(data->kobj, NULL, dev_attr_events.attr.name);
base-commit: 8950c4a350c188deb5f5b05df3244d4db82fe3d8
--
2.41.0
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