linux-kernel - Re: [PATCH v2 2/2] kbuild: link lib-y objects to vmlinux forcibly when CONFIG

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Date:   Thu, 19 Mar 2020 17:22:45 +0100
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-mips@...r.kernel.org, Paul Burton <paulburton@...nel.org>,
        kbuild-all@...ts.01.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        "sparclinux@...r.kernel.org, David S . Miller" <davem@...emloft.net>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Ilie Halip <ilie.halip@...il.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH v2 2/2] kbuild: link lib-y objects to vmlinux forcibly
 when CONFIG_MODULES=y

On Fri, Mar 20, 2020 at 12:48:20AM +0900, Masahiro Yamada wrote:
> Hi Thomas,
> 
> On Thu, Mar 12, 2020 at 5:40 PM Thomas Bogendoerfer
> <tsbogend@...ha.franken.de> wrote:
> >
> > On Thu, Mar 12, 2020 at 03:12:28PM +0900, Masahiro Yamada wrote:
> > > I got the following report from 0-day bot.
> > > Please advise me how to fix it.
> > >
> > >
> > > I am not sure how multi-platform works in MIPS.
> > >
> > > The cavium-octeon platform has its own implementation
> > > of various functions.
> > >
> > > So, vmlinux links different library routines
> > > depending on whether CONFIG_CAVIUM_OCTEON_SOC, correct?
> >
> > for cavium memcpy is directly linked in via octeon-memcpy.o, while for
> > every other platform it's coming from lib/lib.a(memcpy.o).
> >
> > What have you changed, that this doesn't work anymore ?
> >
> > Thomas.
> 
> 
> I want to change all objects from lib-y
> to be linked to vmlinux (exactly like obj-y )
> if CONFIG_MODULES is enabled.

ic

> So, annotating __weak is a good solution
> (thanks Nick!).
> 
> If I send a patch, is it acceptable?

sure.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]