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depmod gets stuck in symlink cycle in arch/arm/boot/dts/include

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Hi,

Linux kernel commit 4027494ae6e3 ("ARM: dts: add arm/arm64 include
symlinks") introduced a couple of symlink cycles:

$ ls -al arch/arm{,64}/boot/dts/include
arch/arm64/boot/dts/include:
total 12
drwxr-xr-x 1 osandov users  38 May 11 14:01 .
drwxr-xr-x 1 osandov users 320 Jan 25 20:44 ..
lrwxrwxrwx 1 osandov users  24 May 11 14:01 arm -> ../../../../arm/boot/dts
lrwxrwxrwx 1 osandov users   2 May 11 14:01 arm64 -> ..
lrwxrwxrwx 1 osandov users  34 Nov 23 12:07 dt-bindings -> ../../../../../include/dt-bindings

arch/arm/boot/dts/include:
total 12
drwxr-xr-x 1 osandov users    38 May 11 14:01 .
drwxr-xr-x 1 osandov users 63102 May 11 14:01 ..
lrwxrwxrwx 1 osandov users     2 May 11 14:01 arm -> ..
lrwxrwxrwx 1 osandov users    26 May 11 14:01 arm64 -> ../../../../arm64/boot/dts
lrwxrwxrwx 1 osandov users    34 Nov 23 12:07 dt-bindings -> ../../../../../include/dt-bindings

On my system, /lib/modules/$(uname -r)/kernel is a symlink to
/lib/modules/$(uname -r)/build, which is my built linux.git. depmod
doesn't like these symlink cycles and ends up in an infinite loop.

Maybe I shouldn't be symlinking kernel to build like this, but depmod
shouldn't be getting stuck like this either. I wonder if anything else
is going to barf on these symlink cycles, too.

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depmod gets stuck in symlink cycle in arch/arm/boot/dts/include Omar Sandoval <osandov@osandov.com> - 2017-05-13 00:30 +0200
  Re: depmod gets stuck in symlink cycle in arch/arm/boot/dts/include Olof Johansson <olof@lixom.net> - 2017-05-13 01:00 +0200
  Re: depmod gets stuck in symlink cycle in arch/arm/boot/dts/include Yauheni Kaliuta <yauheni.kaliuta@redhat.com> - 2017-05-13 07:10 +0200

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