4.19-stable review patch. If anyone has any objections, please let me know.
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From: Zhu Yanjun yanjun.zhu@linux.dev
[ Upstream commit 07d1b99825f40f9c0d93e6b99d79a08d0717bac1 ]
When a mutex lock is not used any more, the function mutex_destroy should be called to mark the mutex lock uninitialized.
Fixes: f2298c0403b0 ("null_blk: multi queue aware block test driver") Signed-off-by: Zhu Yanjun yanjun.zhu@linux.dev Link: https://lore.kernel.org/r/20240425171635.4227-1-yanjun.zhu@linux.dev Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/block/null_blk_main.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 5553df736c720..fb20ed1360f99 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1967,6 +1967,8 @@ static void __exit null_exit(void)
if (g_queue_mode == NULL_Q_MQ && shared_tags) blk_mq_free_tag_set(&tag_set); + + mutex_destroy(&lock); }
module_init(null_init);