[Bug 232387] head -r345558 (updated): system crash during kldload if_epair on powerpc64 (for more modern buildworld buildkernel toolchain experiments), Probably also: ipfw.ko linuxkpi.ko siftr.ko

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232387

--- Comment #24 from commit-hook at freebsd.org ---
A commit references this bug:

Author: luporl
Date: Tue Jun 25 17:15:45 UTC 2019
New revision: 349377
URL: https://svnweb.freebsd.org/changeset/base/349377

Log:
  [PowerPC64] Don't mark module data as static

  Fixes panic when loading ipfw.ko and if_epair.ko built with modern compiler.

  Similar to arm64 and riscv, when using a modern compiler (!gcc4.2), code
  generated tries to access data in the wrong location, causing kernel panic
  (data storage interrupt trap) when loading if_epair and ipfw.

  Issue was reproduced with kernel/module compiled using gcc8 and clang8. It
  affects both ELFv1 and ELFv2 ABI environments.

  PR:           232387
  Submitted by: alfredo.junior_eldorado.org.br
  Reported by:  Mark Millard
  Reviewed by:  jhibbits
  Differential Revision:        https://reviews.freebsd.org/D20461

Changes:
  head/sys/net/vnet.h
  head/sys/sys/pcpu.h

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