Hi Markus,
Thank you for your reply.
> > +++ b/drivers/pci/controller/pcie-aspeed.c
> > @@ -0,0 +1,1137 @@
> …
> > +static int aspeed_irq_msi_domain_alloc(struct irq_domain *domain,
> > + unsigned int virq, unsigned int nr_irqs,
> > + void *args)
> > +{
> …
> > + mutex_lock(&pcie->lock);
> > +
> > + bit = bitmap_find_free_region(pcie->msi_irq_in_use,
> MAX_MSI_HOST_IRQS,
> > + get_count_order(nr_irqs));
> > +
> > + mutex_unlock(&pcie->lock);
> …
>
> Under which circumstances would you become interested to apply a statement
> like “guard(mutex)(&pcie->lock);”?
> https://elixir.bootlin.com/linux/v6.16-rc6/source/include/linux/mutex.h#L225
>
Thanks for the information that made me know this method.
I just referred to the existed drivers in Linux before, and it seems there are a lot of drivers keeping the original usage.
So, I have no idea Linux have introduced these methods.
I will take care of these usages in my develop and will change it in this driver in next version.
Thanks,
Jacky
