linux-kernel - make -jN modules_install breakage in next-20230831

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Message-ID: <CAGXv+5EU-qvTee1f0kicZA-er2Li=EcV0zWdOGUPoqdOxi69vw@mail.gmail.com>
Date:   Thu, 31 Aug 2023 16:59:22 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>
Cc:     linux-kbuild@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: make -jN modules_install breakage in next-20230831

Hi,

I observed some breakage with `make -jN moudles_install`. The scripts produce
some bogus paths, which `cp` then complains it can't find.

I run the following for my workflow.

  $ nice -n 10 sh -c "make -j72 Image.lzma dtbs && ./pack-mod.sh && cb/sign.sh"

pack-mod.sh is what fails. It basically does:

    make -j72 modules
    make -j72 modules_install INSTALL_MOD_PATH=${TMPDIR}
    depmod ...
    tar ...
    cleanup

I get errors like the following:

  CALL    scripts/checksyscalls.sh
  CALL    scripts/checksyscalls.sh
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/arch/arm64/crypto/sha1-ce.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/arch/arm64/crypto/chacha-neon.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/arch/arm64/crypto/poly1305-neon.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/time/test_udelay.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/configs.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/fs/nfs_common/grace.ko
cp: cannot create regular file
'tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/time/test_udelay.ko':
No such file or directory
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/fs/nls/nls_cp437.ko
make[2]: *** [scripts/Makefile.modinst:127:
tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/time/test_udelay.ko]
Error 1
make[2]: *** Waiting for unfinished jobs....
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/fs/nls/nls_ascii.ko
cp: cannot create regular file
'tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/configs.ko':
No such file or directory
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/fs/nls/nls_iso8859-1.ko
  INSTALL tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/fs/nls/nls_utf8.ko
make[2]: *** [scripts/Makefile.modinst:128:
tmp.7i3QCV3ac8/lib/modules/6.5.0-next-20230831-13697-g09d3bd189478-dirty/kernel/kernel/configs.ko]
Error 1
make[1]: *** [/usr/local/google/home/wenst/linux/mtk/Makefile:1822:
modules_install] Error 2
make: *** [Makefile:234: __sub-make] Error 2

Note the duplicate "kernel/" in the path for test_udelay.ko and configs.ko.

If I revert commit 3ee3181f8721 ("Merge branch 'for-next' of
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git"),
then everything works again. Not sure which commit is to blame though.

Regards
ChenYu