linux-kernel - Re: pci_device_id definition cleanups

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Date:	Fri, 15 Feb 2008 19:55:07 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Greg KH <greg@...ah.com>
CC:	Jonas Bonn <jonas@...thpole.se>, linux-kernel@...r.kernel.org
Subject: Re: pci_device_id definition cleanups

Greg KH wrote:
> On Sat, Feb 16, 2008 at 12:21:40AM +0100, Jonas Bonn wrote:
>> I've done some work on cleaning up the definitions of pci_device_id to
>> make them "static const" (where possible) and to make sure they go into
>> __devinitconst.  There are about 350 changes of the type shown in the
>> diff at the end of this mail.
>>
>> ???All these changes are in my public GIT tree at:
>>
>> git://www.southpole.se/~jonas/git/linux.git
>>
>> (Based on 2.6.25-rc2)
>>
>> In addition to these pci_device_id changes, there are a few changesets
>> that move "const" data from __devinitdata to __devinitconst.
>>
>> The tree above builds with both allmodconfig and allyesconfig.
> 
> Hm, does this save us any memory on any type of configuration?
> 
> What about drivers that end up writing to these structures (I know some
> USB drivers do, not sure about PCI ones.)

I don't recall ever seeing a PCI driver do that... and if it exists on 
the PCI side, I would be motivated to create patches to "fix" such 
behavior :)

That information is exported to utilities that expect that table to be 
static.  Messing around with it is just hacky, and bound to produce 
unwanted edge cases.


> You're going to need to send out patches for these to the different
> developers, a git tree isn't going to help much.

Agreed.

	Jeff




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