Re: [PATCH v4 2/7] PCI/ATS: Initialize PRI in pci_ats_init()

[Keith Busch]

On Thu, Aug 01, 2019 at 02:21:07PM -0700, sathyanarayanan kuppuswamy wrote:
> On 8/1/19 2:09 PM, Keith Busch wrote:
> > Rather than surround the call to pci_pri_init() with the #ifdef, you
> > should provide an empty function implementation when CONFIG_PCI_PRI is
> > not defined. Same thing for the next patch adding PASID.
>
> This function is defined and used in the same file (ats.c). Is there any
> advantage in defining an empty function ? But if this is the recommended
> approach, I can make the necessary changes. Please confirm.

That way is just the existing convention, so it's recommended for
kernel style consistency. See the "Conditional Compilation" section in
Documentation/process/coding-style.rst (currently section 21).