Re: [PATCHv2] backing-dev: fix wakeup timer races with bdi_unregister()

[Namjae Jeon]

> Â Â Â Â Â Â Â Âbdi_debug_unregister(bdi);
> - Â Â Â Â Â Â Â device_unregister(bdi->dev);
> +
> + Â Â Â Â Â Â Â spin_lock_bh(&bdi->wb_lock);
> Â Â Â Â Â Â Â Âbdi->dev = NULL;
> + Â Â Â Â Â Â Â spin_unlock_bh(&bdi->wb_lock);
Hi.
Would you explain me why you add spinlock in here ?
Thanks.
> +
> + Â Â Â Â Â Â Â device_unregister(dev);
> Â Â Â Â}
> Â}
> ÂEXPORT_SYMBOL(bdi_unregister);
> --
> 1.7.7.3
>
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