linux-kernel - Re: [GIT PULL] Please pull powerpc/linux.git powerpc-6.1-1 tag

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Date:   Mon, 10 Oct 2022 20:57:00 -0600
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Andrew Donnellan <ajd@...ux.ibm.com>, rmclure@...ux.ibm.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        aneesh.kumar@...ux.ibm.com, atrajeev@...ux.vnet.ibm.com,
        christophe.leroy@...roup.eu, cuigaosheng1@...wei.com,
        david@...hat.com, farosas@...ux.ibm.com, geoff@...radead.org,
        gustavoars@...nel.org, haren@...ux.ibm.com, hbathini@...ux.ibm.com,
        joel@....id.au, lihuafei1@...wei.com, linux-kernel@...r.kernel.org,
        linux@...ck-us.net, linuxppc-dev@...ts.ozlabs.org,
        lukas.bulwahn@...il.com, mikey@...ling.org, nathan@...nel.org,
        nathanl@...ux.ibm.com, nicholas@...ux.ibm.com, npiggin@...il.com,
        pali@...nel.org, paul@...l-moore.com, ruscur@...sell.cc,
        windhl@....com, wsa+renesas@...g-engineering.com,
        ye.xingchen@....com.cn, yuanjilin@...rlc.com,
        zhengyongjun3@...wei.com
Subject: Re: [GIT PULL] Please pull powerpc/linux.git powerpc-6.1-1 tag

On Tue, Oct 11, 2022 at 12:44:20PM +1100, Michael Ellerman wrote:
> "Jason A. Donenfeld" <Jason@...c4.com> writes:
> > Hi Andrew,
> >
> > On Tue, Oct 11, 2022 at 11:00:15AM +1100, Andrew Donnellan wrote:
> >> Thanks for bisecting, this is interesting! Could you provide your
> >> .config and the environment you're running in? Your reproducer doesn't
> >> seem to trigger it on my baremetal POWER8 pseries_le_defconfig.
> >
> > Sure.
> >
> > .config: https://xn--4db.cc/NemFt2Vs (change CONFIG_INITRAMFS_SOURCE)
> > Toolchain: https://download.wireguard.com/qemu-test/toolchains/20211123/powerpc-linux-musl-cross.tgz
> >
> > You can also just run:
> >
> >   ARCH=powerpc make -C tools/testing/selftests/wireguard/qemu -j$(nproc)
> >
> > And that'll assemble the whole thing.
> 
> I tried that :)
> 
> What host OS are you running that on?
> 
> I get:
> 
>   mkdir -p /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc
>   powerpc-linux-musl-gcc -o /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/init -O3 -pipe  -std=gnu11 init.c
>   /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/powerpc-linux-musl-cross/bin/../lib/gcc/powerpc-linux-musl/11.2.1/../../../../powerpc-linux-musl/bin/ld: cannot find Scrt1.o: No such file or directory
>   /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/powerpc-linux-musl-cross/bin/../lib/gcc/powerpc-linux-musl/11.2.1/../../../../powerpc-linux-musl/bin/ld: cannot find crti.o: No such file or directory
>   /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/powerpc-linux-musl-cross/bin/../lib/gcc/powerpc-linux-musl/11.2.1/../../../../powerpc-linux-musl/bin/ld: cannot find crtbeginS.o: No such file or directory
>   /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/powerpc-linux-musl-cross/bin/../lib/gcc/powerpc-linux-musl/11.2.1/../../../../powerpc-linux-musl/bin/ld: cannot find -lgcc
>   /scratch/michael/linus/tools/testing/selftests/wireguard/qemu/build/powerpc/powerpc-linux-musl-cross/bin/../lib/gcc/powerpc-linux-musl/11.2.1/../../../../powerpc-linux-musl/bin/ld: cannot find -lgcc
>   collect2: error: ld returned 1 exit status

Here's what happened:

- You started the thing and the kernel compile complained about an
  unclean tree.
- You ran mrproper.
- You tried to run the thing again.

amirite?

If so, what happened is that mrproper deleted the .o files from the
toolchain. Solution:

  ARCH=powerpc make -C tools/testing/selftests/wireguard/qemu -j$(nproc) clean
  ARCH=powerpc make -C tools/testing/selftests/wireguard/qemu -j$(nproc)

Let me know how that goes.

Jason