Re: [PATCH] binfmt_flat: Remove shared library support

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On Thu, Apr 21, 2022 at 8:52 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> On Thu, Apr 21, 2022 at 1:53 AM Greg Ungerer <gerg@xxxxxxxxxxxxxx> wrote:
> > On 21/4/22 00:58, Eric W. Biederman wrote:
> > > In a recent discussion[1] it was reported that the binfmt_flat library
> > > support was only ever used on m68k and even on m68k has not been used
> > > in a very long time.
> > >
> > > The structure of binfmt_flat is different from all of the other binfmt
> > > implementations becasue of this shared library support and it made
> > > life and code review more effort when I refactored the code in fs/exec.c.
> > >
> > > Since in practice the code is dead remove the binfmt_flat shared libarary
> > > support and make maintenance of the code easier.
> > >
> > > [1] https://lkml.kernel.org/r/81788b56-5b15-7308-38c7-c7f2502c4e15@xxxxxxxxxxxxxx
> > > Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
> > > ---
> > >
> > > Can the binfmt_flat folks please verify that the shared library support
> > > really isn't used?
> >
> > I can definitely confirm I don't use it on m68k. And I don't know of
> > anyone that has used it in many years.
> >
> >
> > > Was binfmt_flat being enabled on arm and sh the mistake it looks like?
>
> I think the question was intended to be
>
>     Was *binfmt_flat_shared_flat* being enabled on arm and sh the
>     mistake it looks like?
>
> > >
> > >   arch/arm/configs/lpc18xx_defconfig |   1 -
> > >   arch/arm/configs/mps2_defconfig    |   1 -
> > >   arch/arm/configs/stm32_defconfig   |   1 -
> > >   arch/arm/configs/vf610m4_defconfig |   1 -

Adding stm32, mps2 and imxrt maintainers to Cc, they are the most active
armv7-m users and should know if the shared library support is used anywhere.

     Arnd



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