Hi Mariusz,

Sorry for the late reply.

On Wed, Sep 13, 2023 at 1:55 AM Mariusz Tkaczyk
[off-list ref] wrote:

We don't need to lock device to reject not supported request
in array_state_store().
Main motivation is to make a room for action does not require lock yet,
like prepare to stop (see md_ioctl()).

I made some changes to the commit log:

    md: do not require mddev_lock() for all options

    We don't need to lock device to reject not supported request
    in array_state_store().
    Main motivation is to make a room for action does not require lock yet,
    like prepare to stop (see md_ioctl()).

But I am not sure what you meant by "make a room for action does not
require lock yet". Could you please explain?

Otherwise, the code looks reasonable to me.

Thanks,
Song