[PATCH 0/2] Fix CMDLINE_EXTEND handling for FDT "bootargs"

[Rob Herring]

On Mon, Mar 1, 2021 at 11:45 AM Christophe Leroy
<christophe.leroy at csgroup.eu> wrote:
>
>
>
> Le 01/03/2021 à 18:26, Rob Herring a écrit :
> > +PPC folks and Daniel W
> >
> > On Mon, Mar 1, 2021 at 8:42 AM Will Deacon <will at kernel.org> wrote:
> >>
> >> On Mon, Mar 01, 2021 at 08:19:32AM -0600, Rob Herring wrote:
> >>> On Thu, Feb 25, 2021 at 6:59 AM Will Deacon <will at kernel.org> wrote:
> >>>> We recently [1] enabled support for CMDLINE_EXTEND on arm64, however
> >>>> when I started looking at replacing Android's out-of-tree implementation [2]
> >>>
> >>> Did anyone go read the common, reworked version of all this I
> >>> referenced that supports prepend and append. Here it is again[1].
> >>> Maybe I should have been more assertive there and said 'extend' is
> >>> ambiguous.
> >>
> >> I tried reading that, but (a) most of the series is not in the mailing list
> >> archives and (b) the patch that _is_ doesn't touch CMDLINE_EXTEND at all.
> >> Right now the code in mainline does the opposite of what it's documented to
> >> do.
> >
> > Actually, there is a newer version I found:
> >
> > https://lore.kernel.org/linuxppc-dev/1551469472-53043-1-git-send-email-danielwa@cisco.com/
> > https://lore.kernel.org/linuxppc-dev/1551469472-53043-2-git-send-email-danielwa@cisco.com/
> > https://lore.kernel.org/linuxppc-dev/1551469472-53043-3-git-send-email-danielwa@cisco.com/
>
> This was seen as too much intrusive into powerpc.

It looked like the main issue was string functions for KASAN?

As far as being too complex, I think that will be needed if you look
at all architectures and non-DT cases.

> I proposed an alternative at
> https://patchwork.ozlabs.org/project/linuxppc-dev/cover/cover.1554195798.git.christophe.leroy@c-s.fr/ but
> never got any feedback.

Didn't go to a list I subscribe to. In particular, if it had gone to
DT list and into PW you would have gotten a reply from me.

Rob