linux-kernel - Re: [PATCH 04/23] kbuild: doc: remove the description about shipped files

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Message-ID: <CAK7LNATf0MznDOOaz9gkhT+a95q=Y0ocaLrJT6wrj3sYrEi3wQ@mail.gmail.com>
Date: Fri, 20 Sep 2024 01:53:58 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Nicolas Schier <n.schier@....de>
Cc: linux-kbuild@...r.kernel.org, Miguel Ojeda <ojeda@...nel.org>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Nathan Chancellor <nathan@...nel.org>
Subject: Re: [PATCH 04/23] kbuild: doc: remove the description about shipped files

On Thu, Sep 19, 2024 at 1:24 AM Nicolas Schier <n.schier@....de> wrote:
>
> On Tue, Sep 17, 2024 at 11:16:32PM +0900, Masahiro Yamada wrote:
> > The use of shipped files is discouraged in the upstream kernel these
> > days. [1]
> >
> > Downstream Makefiles have the freedom to use shipped files or other
> > options to handle binaries, but this is not what should be advertised
> > in the upstream document.
> >
> > [1]: https://lore.kernel.org/all/CAHk-=wgSEi_ZrHdqr=20xv+d6dr5G895CbOAi8ok+7-CQUN=fQ@mail.gmail.com/
> >
> > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> > ---
> >
> >  Documentation/kbuild/modules.rst | 35 +++-----------------------------
> >  1 file changed, 3 insertions(+), 32 deletions(-)
>
> Do you want to remove the TODO point refering to *_shipped files from
> Documentation/kbuild/makefiles.rst as well?


Yes.

Good catch.



> $ git grep -Hrne _shipped Documentation/
> Documentation/kbuild/makefiles.rst:1668:- Describe how kbuild supports shipped files with _shipped.
>
> >
> > diff --git a/Documentation/kbuild/modules.rst b/Documentation/kbuild/modules.rst
> > index 7eceb9a65e9c..1afa6b1b4090 100644
> > --- a/Documentation/kbuild/modules.rst
> > +++ b/Documentation/kbuild/modules.rst
> [...]
> > @@ -240,35 +235,11 @@ module 8123.ko, which is built from the following files::
> >               default:
> >                       $(MAKE) -C $(KDIR) M=$$PWD
> >
> > -             # Module specific targets
> > -             genbin:
> > -                     echo "X" > 8123_bin.o_shipped
> > -
> >       The split in example 2 is questionable due to the simplicity of
> >       each file; however, some external modules use makefiles
> >       consisting of several hundred lines, and here it really pays
> >       off to separate the kbuild part from the rest.
> >
> > -3.3 Binary Blobs
> > -----------------
> > -
> > -     Some external modules need to include an object file as a blob.
> > -     kbuild has support for this, but requires the blob file to be
> > -     named <filename>_shipped. When the kbuild rules kick in, a copy
> > -     of <filename>_shipped is created with _shipped stripped off,
> > -     giving us <filename>. This shortened filename can be used in
> > -     the assignment to the module.
> > -
> > -     Throughout this section, 8123_bin.o_shipped has been used to
> > -     build the kernel module 8123.ko; it has been included as
> > -     8123_bin.o::
> > -
> > -             8123-y := 8123_if.o 8123_pci.o 8123_bin.o
> > -
> > -     Although there is no distinction between the ordinary source
> > -     files and the binary file, kbuild will pick up different rules
> > -     when creating the object file for the module.
> > -
>
> I think renumbering the following sections would provide a more consistent document.  If you think that keeping the numbering constant:  would you mind adding a note about section 3.3 being removed?
> (And possibly as well in the table of contents?)

Rather, I'd like to remove section numbers.

Let me do that way.


> Either way,
>
> Reviewed-by: Nicolas Schier <n.schier@....de>



-- 
Best Regards
Masahiro Yamada