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Date:	Wed, 27 Nov 2013 22:24:23 -0800
From:	Joe Perches <joe@...ches.com>
To:	'Greg Kroah-Hartman' <gregkh@...uxfoundation.org>
Cc:	Jingoo Han <jg1.han@...sung.com>, linux-kernel@...r.kernel.org,
	'Andrew Morton' <akpm@...ux-foundation.org>,
	'Andy Whitcroft' <apw@...onical.com>,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH 1/5] serial: 8250_pci: use DEFINE_PCI_DEVICE_TABLE macro

On Wed, 2013-11-27 at 21:53 -0800, 'Greg Kroah-Hartman' wrote:
> On Wed, Nov 27, 2013 at 09:40:13PM -0800, Joe Perches wrote:
> > On Thu, 2013-11-28 at 14:29 +0900, Jingoo Han wrote:
> > > On Thursday, November 28, 2013 1:08 PM, Greg Kroah-Hartman wrote:
> > > > On Thu, Nov 28, 2013 at 10:55:35AM +0900, Jingoo Han wrote:
> > > > > This macro is used to create a struct pci_device_id array.
> > > > 
> > > > Yeah, and it's a horrid macro that deserves to be removed, please don't
> > > > use it in more places.
> > > > 
> > > > Actually, if you could just remove it, that would be best, sorry, I'm
> > > > not going to take these patches.
> > > 
> > > (+cc Joe Perches, Andrew Morton, Andy Whitcroft)
> > > 
> > > Hi Joe Perches,
> > > 
> > > Would you fix checkpatch.pl about DEFINE_PCI_DEVICE_TABLE?
> > > Currently, checkpatch.pl guides to use DEFINE_PCI_DEVICE_TABLE
> > > as below.
> > > 
> > >   WARNING: Use DEFINE_PCI_DEVICE_TABLE for struct pci_device_id
> > >   #331: FILE: drivers/usb/host/ehci-pci.c:331:
> > >   +static const struct pci_device_id pci_ids [] = { {
> > > 
> > > However, Greg Kroah-Hartman mentioned that DEFINE_PCI_DEVICE_TABLE
> > > shouldn't be used anymore.
> > > 
> > > So, would you change checkpatch.pl in order to guide to use
> > > struct pci_device_id instead of DEFINE_PCI_DEVICE_TABLE?
> > > 
> > > For example,
> > >   WARNING: Use struct pci_device_id instead of DEFINE_PCI_DEVICE_TABLE
> > 
> > The documentation doesn't agree with Greg.
[]
> I say just remove it, I should have done that years ago when I was the
> PCI maintainer, just never got around to it.  No other bus has something
> like this for their device ids, why should PCI be "special"?

Anyone else have an opinion?

I don't care one way or another, but please, one way
not two.

Changing checkpatch is a trifle, but there are a _lot_
of maintainers to work through if it's to be removed.

It'll probably take several releases.

$ git grep --name-only -w DEFINE_PCI_DEVICE_TABLE | \
  cut -f1,2 -d/ | uniq -c
      1 Documentation/PCI
      1 arch/x86
      1 drivers/bcma
      3 drivers/block
      1 drivers/char
      1 drivers/cpufreq
      2 drivers/dma
     18 drivers/edac
      6 drivers/gpio
      6 drivers/gpu
      6 drivers/hwmon
     20 drivers/i2c
      2 drivers/infiniband
      1 drivers/ipack
      1 drivers/leds
      3 drivers/media
     10 drivers/mfd
      2 drivers/misc
      1 drivers/mmc
      1 drivers/mtd
    132 drivers/net
      1 drivers/ntb
      1 drivers/pci
      5 drivers/pcmcia
      2 drivers/platform
      1 drivers/ptp
      1 drivers/rapidio
      7 drivers/scsi
      3 drivers/spi
     65 drivers/staging
      3 drivers/tty
      1 drivers/uio
      5 drivers/usb
      1 drivers/video
      1 drivers/virtio
      3 drivers/vme
      9 drivers/watchdog
      1 drivers/xen
      1 include/linux
      1 scripts/checkpatch.pl
      1 scripts/tags.sh
      1 sound/oss
     67 sound/pci


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