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

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Date:   Wed, 9 Jun 2021 08:08:06 -0700
From:   Tom Rix <trix@...hat.com>
To:     Greg KH <gregkh@...uxfoundation.org>
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 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.

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.

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

My preference is for subdir's.

Tom

>
> greg k-h
>