Re: [PATCH 2/3] null_blk: give the file-scope mutex a descriptive name

[Bart Van Assche]

On 7/6/26 5:35 AM, Zizhi Wo wrote:
> The file-scope lock mutex mainly serializes access to the global nullb_list
> and related device setup. Rename it to "nullb_list_lock" to make its
> purpose clear. No functional change.

From commit a2db328b0839 ("null_blk: fix null-ptr-dereference while
configuring 'power' and 'submit_queues'"):

    Writing 'power' and 'submit_queues' concurrently will trigger kernel
    panic:
    [ ... ]
    Fix this problem by resuing the global mutex to protect
    nullb_device_power_store() and nullb_update_nr_hw_queues() from 
configfs.

This makes it clear that the "lock" mutex has a broader purpose than
only protecting nullb_list. Hence, the name nullb_list_lock is
confusing. How about using the name "nullb_lock"?

Thanks,

Bart.