---
- branch: MAIN
  date: Sun Feb 13 13:41:44 UTC 2022
  files:
  - new: '1.17'
    old: '1.16'
    path: src/sys/arch/m68k/include/lock.h
    pathrev: src/sys/arch/m68k/include/lock.h@1.17
    type: modified
  id: 20220213T134144Z.ee0479a43aeaa2bbcb98046a1d9f51751ae1e1ee
  log: |
    m68k: __cpu_simple_unlock audit.

    - Use `cc' clobbers in asm volatile because they touch the condition
      codes.

    - Use `memory' clobbers in asm volatile so the compiler doesn't move
      up loads and stores in the critical section at _other_ addresses
      than the lock so they happen before __cpu_simple_lock or
      __cpu_simple_lock_try.

    - Not sure if we have any (or if there even are any?) multicore m68k
      systems out there, but __cpu_simple_unlock needs __insn_barrier
      either way so the compiler doesn't delay loads and stores prior to
      __cpu_simple_unlock so they happen after it.
  module: src
  subject: 'CVS commit: src/sys/arch/m68k/include'
  unixtime: '1644759704'
  user: riastradh