Re: [PATCH 1/4] pci: Add PCI_BUS() and PCI_DEVID() interfaces to return bus number and device id

From: David Howells
Date: Mon Feb 25 2013 - 19:51:46 EST

Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:

> David, can you point me at a description of include/uapi ... what is
> there and why, and how we should decide what new things go in
> include/uapi/linux/pci.h as opposed to include/linux/pci.h? Maybe
> there should be something in Documentation/?

Probably in CodingStyle, Submitting* or somewhere similar.

> I'm guessing it's something to do with being exported to userland, but
> I'm not sure the things in this patch (PCI_DEV_ID, PCI_BUS) are really
> exportable in the sense of being used for syscalls, etc.

As a rule, if it's in uapi/ then it's exported to userspace; if it's not, then
it isn't. The old headers where disintegrated along the lines of __KERNEL__
delimited sections by my scripts.

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