[PATCH] Document pci_ids.h addition policy.

[Dave Jones <davej@redhat.com>]

On Thu, Aug 06, 2009 at 11:33:26AM -0700, Greg Kroah-Hartman wrote:
 
 > > I agree. In fact, I'd go further, and say that the bulk of what we have
 > > in pci_ids.h is also pointlessly shared. Only a tiny fraction of the device
 > > entries in that file are used by multiple files in the kernel.
 > 
 > I agree with that as well, which is why when I was PCI maintainer, I
 > didn't allow any new additions to the pci_ids.h file, unless it was
 > going to be an id that was shared by different drivers.  That cut the
 > new additions down to about none :)

Perhaps documenting this is a good idea to prevent things being moved there,
as it still seems to be happening judging from the git log.

Signed-off-by: Dave Jones <davej@redhat.com>
 
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 73b46b6..f9156fd 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2,6 +2,9 @@
  *	PCI Class, Vendor and Device IDs
  *
  *	Please keep sorted.
+ *
+ *	Do not add new entries to this file unless the definitions
+ *	are shared between multiple drivers.
  */
 
 /* Device classes and subclasses */