linux-kernel - Re: [PATCH v2 0/4] fpga: reorganize to subdirs

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Message-ID: <YMDueTEHGWuAcknP@kroah.com>
Date:   Wed, 9 Jun 2021 18:38:17 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Tom Rix <trix@...hat.com>
Cc:     mdf@...nel.org, hao.wu@...el.com, michal.simek@...inx.com,
        nava.manne@...inx.com, dinguyen@...nel.org,
        krzysztof.kozlowski@...onical.com, yilun.xu@...el.com,
        arnd@...db.de, fpacheco@...hat.com, richard.gong@...el.com,
        luca@...aceresoli.net, linux-kernel@...r.kernel.org,
        linux-fpga@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/4] fpga: reorganize to subdirs

On Wed, Jun 09, 2021 at 08:08:06AM -0700, Tom Rix wrote:
> 
> On 6/9/21 7:53 AM, Greg KH wrote:
> > On Wed, Jun 09, 2021 at 07:22:03AM -0700, trix@...hat.com wrote:
> > > From: Tom Rix <trix@...hat.com>
> > > 
> > > The incoming xrt patchset has a toplevel subdir xrt/
> > > The current fpga/ uses a single dir with filename prefixes to subdivide owners
> > > For consistency, there should be only one way to organize the fpga/ dir.
> > > Because the subdir model scales better, refactor to use it.
> > > The discussion wrt xrt is here:
> > > https://lore.kernel.org/linux-fpga/68e85a4f-4a10-1ff9-0443-aa565878c855@redhat.com/
> > > 
> > > Follow drivers/net/ethernet/ which has control configs
> > > NET_VENDOR_BLA that map to drivers/net/ethernet/bla
> > > Since fpgas do not have many vendors, drop the 'VENDOR' and use
> > > FPGA_BLA.
> > > 
> > > There are several new subdirs
> > > altera/
> > > dfl/
> > > lattice/
> > > xilinx/
> > > 
> > > Each subdir has a Kconfig that has a new/reused
> > > 
> > > if FPGA_BLA
> > >    ... existing configs ...
> > > endif FPGA_BLA
> > > 
> > > Which is sourced into the main fpga/Kconfig
> > > 
> > > Each subdir has a Makefile whose transversal is controlled in the
> > > fpga/Makefile by
> > > 
> > > obj-$(CONFIG_FPGA_BLA) += bla/
> > > 
> > > Some cleanup to arrange thing alphabetically and make fpga/Makefile's
> > > whitespace look more like net/'s
> > > 
> > > Changes from
> > > v1
> > >    Drop renaming files
> > >    Cleanup makefiles
> > You can rename the files, you just can not rename the .ko objects
> > without everyone knowing what you are doing and you trying to bury it in
> > the middle of a differently described patch.
> > 
> > If you want to do that, do you?  I don't really understand why you want
> > to move things around right now other than "we have 40 files in one
> > directory, ick!".
> 
> I am trying to resolve the layout inconsistency between what we have and
> what the xrt patchset does.

Why does it matter?  New stuff can be added to a new dir, why worry
about old stuff?  What does it hurt?

> The big issue is the files vs dirs.
> 
> Over specified filenames is secondary, so I dropped them.
> 
> 40 files in one dir is itself not a problem.
> 
> having 40 files and an xrt/ is.

Why is that a "problem"?

> fpga/ layout should be consistent so the Makefile and Kconfig are easier to
> maintain.

Is it somehow hard to maintain today?  Seems pretty trivial to me...

thanks,

greg k-h