[PATCH v2 -next] drm: gma500: use DEFINE_MUTEX() for mutex lock

[Zheng Yongjun]

mutex lock can be initialized automatically with DEFINE_MUTEX()
rather than explicitly calling mutex_init().

Signed-off-by: Zheng Yongjun <zhengyongjun3 at huawei.com>
---
 drivers/gpu/drm/gma500/power.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/gma500/power.c b/drivers/gpu/drm/gma500/power.c
index bea8578846d1..b361e41c6acd 100644
--- a/drivers/gpu/drm/gma500/power.c
+++ b/drivers/gpu/drm/gma500/power.c
@@ -35,7 +35,7 @@
 #include <linux/mutex.h>
 #include <linux/pm_runtime.h>
 
-static struct mutex power_mutex;	/* Serialize power ops */
+static DEFINE_MUTEX(power_mutex);	/* Serialize power ops */
 static spinlock_t power_ctrl_lock;	/* Serialize power claim */
 
 /**
@@ -56,7 +56,6 @@ void gma_power_init(struct drm_device *dev)
 	dev_priv->display_count = 0;	/* Currently no users */
 	dev_priv->suspended = false;	/* And not suspended */
 	spin_lock_init(&power_ctrl_lock);
-	mutex_init(&power_mutex);
 
 	if (dev_priv->ops->init_pm)
 		dev_priv->ops->init_pm(dev);
-- 
2.22.0