linux-kernel - [PATCH v2 -next] mlx5: use DEFINE

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Message-ID: <20201224132323.31126-1-zhengyongjun3@huawei.com>
Date:   Thu, 24 Dec 2020 21:23:23 +0800
From:   Zheng Yongjun <zhengyongjun3@...wei.com>
To:     <linux-rdma@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <leon@...nel.org>, <dledford@...hat.com>, <jgg@...pe.ca>,
        Zheng Yongjun <zhengyongjun3@...wei.com>
Subject: [PATCH v2 -next] mlx5: use DEFINE_MUTEX() for mutex lock

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

Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
---
 drivers/infiniband/hw/mlx5/main.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 246e3cbe0b2c..8a260773722f 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -79,7 +79,7 @@ static DEFINE_MUTEX(mlx5_ib_multiport_mutex);
  * doesn't work on kernel modules memory
  */
 static unsigned long xlt_emergency_page;
-static struct mutex xlt_emergency_page_mutex;
+static DEFINE_MUTEX(xlt_emergency_page_mutex);
 
 struct mlx5_ib_dev *mlx5_ib_get_ibdev_from_mpi(struct mlx5_ib_multiport_info *mpi)
 {
@@ -4874,8 +4874,6 @@ static int __init mlx5_ib_init(void)
 	if (!xlt_emergency_page)
 		return -ENOMEM;
 
-	mutex_init(&xlt_emergency_page_mutex);
-
 	mlx5_ib_event_wq = alloc_ordered_workqueue("mlx5_ib_event_wq", 0);
 	if (!mlx5_ib_event_wq) {
 		free_page(xlt_emergency_page);
-- 
2.22.0