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Date:   Tue, 9 Mar 2021 16:10:46 +0100
From:   Michal =?iso-8859-1?Q?Such=E1nek?= <msuchanek@suse.de>
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arm64: make STACKPROTECTOR_PER_TASK configurable.
Message-ID: <20210309151046.GZ6564@kitsune.suse.cz>
References: <20210309123544.14040-1-msuchanek@suse.de>
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On Tue, Mar 09, 2021 at 11:53:21PM +0900, Masahiro Yamada wrote:
> On Tue, Mar 9, 2021 at 10:35 PM Michal Such?nek <msuchanek@suse.de> 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@suse.de> 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@kernel.org>
> > > > Signed-off-by: Michal Suchanek <msuchanek@suse.de>
> > >
> > >
> > > 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