Re: [PATCH V4 1/9] null_blk: use DEFINE_MUTEX for the file-scope mutex

[Nilay Shroff]

On 7/9/26 3:34 PM, Zizhi Wo wrote:
> In null_init(), mutex_init(&lock) currently happens after
> configfs_register_subsystem(), which exposes the nullb subsystem to
> userspace. A racing mkdir() into/sys/kernel/config/nullb/ can reach
> null_find_dev_by_name() -> mutex_lock(&lock) before the mutex is
> initialized, trigger warning:

Looks good to me.

Reviewed-by: Nilay Shroff <nilay@xxxxxxxxxxxxx>