[PATCH 7/7] mailbox: goog-mba: Introduce the goog-mba mailbox driver

[Markus Elfring]

…
> +++ b/drivers/mailbox/goog-mba.c
> @@ -0,0 +1,567 @@
…
> +static int goog_mba_send_data(struct mbox_chan *chan, void *msg)
> +{
…
> +		spin_lock_irqsave(&goog_mbox->lock, flags);
> +		out_of_space = payload_words &&
> +			       (goog_mbox->outstanding_msgs >=
> +				goog_mbox->msg_buffer_words / payload_words);
> +		spin_unlock_irqrestore(&goog_mbox->lock, flags);
…

Under which circumstances would you become interested to apply a statement
like “guard(spinlock_irqsave)(&goog_mbox->lock);”?
https://elixir.bootlin.com/linux/v7.3-rc6/source/include/linux/spinlock.h#L642-L645

Regards,
Markus