Re: [ptxdist] Platform-specific kernel patchset not applied to kernel headers package?

[Guillermo Rodriguez Garcia <guille.rodriguez@gmail.com>]

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Hi,

2018-01-29 11:37 GMT+01:00 Michael Olbrich <m.olbrich@pengutronix.de>:

> Hi,
>
> On Mon, Jan 29, 2018 at 10:51:07AM +0100, Guillermo Rodriguez Garcia wrote:
> > 2018-01-26 13:58 GMT+01:00 Michael Olbrich <m.olbrich@pengutronix.de>:
> > > On Fri, Jan 26, 2018 at 01:40:31PM +0100, Alexander Dahl wrote:
> > > > On Fri, Jan 26, 2018 at 08:58:52AM +0100, Guillermo Rodriguez Garcia
> > > wrote:
> > > > > I am creating a ptxdist BSP and have a series.<platform> patchset
> for a
> > > > > given kernel version. I have noticed that this patchset is ignored
> > > when the
> > > > > KERNEL_HEADER package is built -- instead, a "series" file is
> > > automatically
> > > > > created and used.
> > > > >
> > > > > Is this normal/expected? Shouldn't the series.<platform> file be
> used
> > > > > instead?
> > > >
> > > > It is at least known. I stumbled over this last year:
> > > >
> > > > https://www.mail-archive.com/ptxdist@pengutronix.de/msg12233.html
> > > >
> > > > Michael gave some hints for possible workarounds.
> > >
> > >
> > > Right, check that thread.
> > >
> > > Also, why do you need a 'series.<platform>' instead of a normal series
> > > file?
> > >
> >
> > I used series.<platform> because the BSP currently supports two platforms
> > (two boards), and some of the patches are platform-specific.
> >
> >
> > > And why do you need the patches for the kernel headers?
> > >
> >
> > This is because I am building imx6 specific packages which require a set
> of
> > kernel headers, and these must include imx6-specific bits.
> >
> > In the thread that Alexander mentioned in his reply you mention the
> > following:
> >
> > 1. Move the patches to configs/platform-XXX/patches/linux-4.9.47/ and
> just
> > use 'series'.
>
> In most cases, that's the correct way to handle this. All platform specific
> files should be in configs/platform-XXX/ anyways.
>
> Keeping the patches Toplevel has one use-case:
> Some patches are used by both platforms. I'd still move the patches to the
> platforms and use symlinks to share: Patches can be in subdirs, so just on
> Symlink to the common set of patches is enough.
>
> > I guess this solves my problem, however, just out of curiosity: If the
> > kernel headers package will pick up the correct patchset from
> > configs/platform-XXX/patches/linux-4.9.47, shouldn't it also pick it up
> if
> > it lives in patches/linux-4.9.47/series.XXX ?
>
> Checking in configs/platform-XXX/patches/ is a generic PTXdist mechanism.
> Using 'series.XXX' is a hack in the Kernel patches to work with bad
> patches. It's a mechanism that I'd like to get rid of. But there are still
> people using it.
> It's not something I want to spread to other packages.
>

Thank you for the explanation, I know understand the background and
motivations.

Still I would suggest to either get rid of the "series.XXX" hack (perhaps
with a check and a warning) or make it applicable to kernel headers as
well. The current behaviour is a bit surprising.

Anyway my problem is solved now so thank you again.
Guillermo Rodriguez Garcia
guille.rodriguez@gmail.com

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