[PATCH -next] block: use DEFINE_MUTEX() for mutex lock
From: Zheng Yongjun <hidden>
Date: 2021-04-05 10:00:53
Also in:
kernel-janitors
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
mutex lock can be initialized automatically with DEFINE_MUTEX() rather than explicitly calling mutex_init(). Reported-by: Hulk Robot <redacted> Signed-off-by: Zheng Yongjun <redacted> --- drivers/block/null_blk/main.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index d6c821d48090..b15df944cde2 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c@@ -67,7 +67,7 @@ struct nullb_page { #define NULLB_PAGE_FREE (MAP_SZ - 2) static LIST_HEAD(nullb_list); -static struct mutex lock; +static DEFINE_MUTEX(lock); static int null_major; static DEFINE_IDA(nullb_indexes); static struct blk_mq_tag_set tag_set;
@@ -1961,8 +1961,6 @@ static int __init null_init(void) if (ret) goto err_tagset; - mutex_init(&lock); - null_major = register_blkdev(0, "nullb"); if (null_major < 0) { ret = null_major;