[U-Boot] [PATCH] configs: Remove CONFIG_SPL_FS_EXT4 for all MX6 platforms

[Tom Rini <trini@konsulko.com>]

On Sun, May 26, 2019 at 12:57:08AM +0200, Marek Vasut wrote:
> On 5/26/19 12:45 AM, Ezequiel Garcia wrote:
> > On Sun, 2019-05-26 at 00:24 +0200, Marek Vasut wrote:
> >> On 5/25/19 11:47 PM, Ezequiel Garcia wrote:
> >>> On Sat, 2019-05-25 at 22:15 +0200, Marek Vasut wrote:
> >>>> On 5/25/19 6:49 PM, Ezequiel Garcia wrote:
> >>>>> i.MX6 platforms boot U-Boot second-stage from unformatted space,
> >>>>> and should not need Ext filesystem support on SPL.
> >>>>>
> >>>>> The commit was generated with:
> >>>>>
> >>>>> git grep -l MX6 -- configs/ | xargs grep -l SPL_FS_EXT4 | xargs sed -i -e '/CONFIG_SPL_FS_EXT4=y/d'
> >>>>>
> >>>>> This change has a dramatic impact on SPL size:
> >>>>>
> >>>>> ./scripts/bloat-o-meter old new
> >>>>> add/remove: 0/59 grow/shrink: 0/3 up/down: 0/-8674 (-8674)
> >>>>> [..]
> >>>>> Total: Before=38320, After=29646, chg -22.64%
> >>>>>
> >>>>> Cc: Otavio Salvador <otavio@ossystems.com.br>
> >>>>> Cc: Fabio Estevam <fabio.estevam@nxp.com>
> >>>>> Cc: Peng Fan <peng.fan@nxp.com>
> >>>>> Cc: Marek Vasut <marex@denx.de>
> >>>>> Cc: Stefano Babic <sbabic@denx.de>
> >>>>> Cc: Stefan Roese <sr@denx.de>
> >>>>> Cc: "Eric Bénard" <eric@eukrea.com>
> >>>>> Cc: Breno Lima <breno.lima@nxp.com>
> >>>>> Cc: Francesco Montefoschi <francesco.montefoschi@udoo.org>
> >>>>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> >>>>> ---
> >>>>> Tested on Wandboard only. Maintainers, please ACK or NAK!
> >>>>>
> >>>>>  configs/cgtqmx6eval_defconfig       | 1 -
> >>>>>  configs/mx6cuboxi_defconfig         | 1 -
> >>>>>  configs/mx6sabreauto_defconfig      | 1 -
> >>>>>  configs/mx6sabresd_defconfig        | 1 -
> >>>>>  configs/mx6slevk_spl_defconfig      | 1 -
> >>>>>  configs/mx6sxsabresd_spl_defconfig  | 1 -
> >>>>>  configs/mx6ul_14x14_evk_defconfig   | 1 -
> >>>>>  configs/mx6ul_9x9_evk_defconfig     | 1 -
> >>>>>  configs/novena_defconfig            | 1 -
> >>>>
> >>>> NAK, I boot my Novena from ext4 and this just broke it.
> >>>>
> >>>> And also, NAK, this removes functionality from SPL which worked fine before.
> >>>>
> >>>
> >>> I'll drop from Novena, but I think the patch still makes some sense,
> >>> why do you want Ext4 on SPL?
> >>
> >> What other filesystem is available in SPL and doesn't have patent problems ?
> >>
> > 
> > Sorry for not being clear. I am asking why turn on a feature that is so heavy,
> > on a system that won't need it (such as Sabre* boards, Wandboard and similar)?
> 
> Two reasons:
> 1) It was enabled, disabling it means removing functionality for no good
>    reason (oops, bloat, is not a good reason), and that is not desired.
> 2) Booting from block device implies booting from a filesystem,
>    otherwise you might overwrite various things on the block device when
>    updating the file (u-boot image).

So, are you using SPL to load something from ext4 or not?  There are
setups where people have configured the system such that SPL loads
something from ext4 and that's why we have it available.  Is anyone
doing that on Novena?  Or any iMX system?

-- 
Tom
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