Re: [PATCH] arm64: make STACKPROTECTOR_PER_TASK configurable.

[Michal Suchánek]

On Tue, Mar 09, 2021 at 11:53:21PM +0900, Masahiro Yamada wrote:
> On Tue, Mar 9, 2021 at 10:35 PM Michal Suchánek <msuchanek@xxxxxxx> wrote:
> >
> > On Tue, Mar 09, 2021 at 10:22:36PM +0900, Masahiro Yamada wrote:
> > > On Tue, Mar 9, 2021 at 9:35 PM Michal Suchanek <msuchanek@xxxxxxx> wrote:
> > > >
> > > > When using dummy-tools STACKPROTECTOR_PER_TASK is unconditionally
> > > > selected. This defeats the purpose of the all-enabled tool.
> > > >
> > > > Description copied from arm
> > > >
> > > > Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> > > > Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
> > >
> > >
> > > Could you explain what problem
> > > this patch is trying to solve?
> >
> > The option cannot be disabled when compiler has the required capability.
> 
> 
> Yes.
> Currently, this symbol claims "def_bool y",
> so there is no way to disable it.
> 
> But, it comes from the nature of Kconfig in general.
> 
> dummy-tools is completely unrelated here.

dummy-tools makes all configuration options available in order to be
able to author configuration files on system different from the one
where the kernel is built. This prevents authoring a configuration file
with this option disabled.

Thanks

Michal