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[Christophe Lyon <christophe.lyon@xxxxxxxxxx>]

It's not clear to me how I can reproduce the problem as a GCC developper.
Should I build kernel-4.3.0 (vanilla), using the defconfig attached on comment #13, build the modules and look for the relocation mentioned by Ard Biesheuvel?

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https://bugs.launchpad.net/bugs/1533009

Title:
  arm64: "unsupported RELA relocation"

Status in Linaro GCC:
  Unknown
Status in Linux:
  Unknown
Status in gcc-5 package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Triaged

Bug description:
  linux-image-4.3.0-5-generic 4.3.0-5.16 arm64 fails to load modules
  (and therefore boot). It emits messages like the following for each
  attempted module load:

  [    2.156817] module libahci: unsupported RELA relocation: 275

  This is reminiscent of LP: #1502946 - except that fix appears to still
  be in-tact. What has changed, however, is the build environment. If I
  rebuild the same kernel source in a wily chroot, it boots fine.

  Marking "Confirmed" because Paulo Pisatti reported this to me, and I
  reproduced.

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