linux-kernel - Re: [PATCH] arm64/sve: fix genksyms generation

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Date:   Wed, 10 Jul 2019 09:15:16 +0100
From:   Will Deacon <will@...nel.org>
To:     Laura Abbott <labbott@...hat.com>, yamada.masahiro@...ionext.com
Cc:     Arnd Bergmann <arnd@...db.de>, Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Maydell <peter.maydell@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Julien Grall <julien.grall@....com>,
        Alan Hayward <alan.hayward@....com>,
        Andrew Murray <andrew.murray@....com>,
        Alex Bennée <alex.bennee@...aro.org>,
        Dave Martin <Dave.Martin@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm64/sve: fix genksyms generation

Hi Laura, [+Masahiro]

On Tue, Jul 09, 2019 at 03:06:49PM -0400, Laura Abbott wrote:
> On 6/18/19 10:15 AM, Arnd Bergmann wrote:
> > On Tue, Jun 18, 2019 at 2:03 PM Will Deacon <will.deacon@....com> wrote:
> > >  From 6e004b8824d4eb6a4e61cd794fbc3a761b50135b Mon Sep 17 00:00:00 2001
> > > From: Will Deacon <will.deacon@....com>
> > > Date: Tue, 18 Jun 2019 12:56:49 +0100
> > > Subject: [PATCH] genksyms: Teach parse about __uint128_t built-in type
> > > 
> > > __uint128_t crops up in a few files that export symbols to modules, so
> > > teach genksyms about it so that we don't end up skipping the CRC
> > > generation for some symbols due to the parser failing to spot them:
> > > 
> > >    | WARNING: EXPORT symbol "kernel_neon_begin" [vmlinux] version
> > >    |          generation failed, symbol will not be versioned.
> > >    | ld: arch/arm64/kernel/fpsimd.o: relocation R_AARCH64_ABS32 against
> > >    |     `__crc_kernel_neon_begin' can not be used when making a shared
> > >    |     object
> > >    | ld: arch/arm64/kernel/fpsimd.o:(.data+0x0): dangerous relocation:
> > >    |     unsupported relocation
> > > 
> > > Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> > > Reported-by: Arnd Bergmann <arnd@...db.de>
> > > Signed-off-by: Will Deacon <will.deacon@....com>
> > 
> > Looks good to me,
> > 
> > Acked-by: Arnd Bergmann <arnd@...db.de>
> > 
> > I've added this to my randconfig build setup, replacing my earlier
> > patch, and will let you know if any problems with it remain.
> > 
> 
> I just hit this on 5ad18b2e60b75c7297a998dea702451d33a052ed on Linus'
> branch. The fix works for me (feel free to add Tested-by). Is this
> already queued up for Linus?

I think there's a fix queued via the kbuild tree:

https://lkml.kernel.org/r/CAK7LNAQRMnovWQA0F8A6mEqDjPxXOGM-1AHoyh1gQa367f+FqQ@mail.gmail.com

Will