---
- branch: MAIN
  date: Sun Feb 27 14:17:10 UTC 2022
  files:
  - new: '1.105'
    old: '1.104'
    path: src/sys/arch/alpha/alpha/cpu.c
    pathrev: src/sys/arch/alpha/alpha/cpu.c@1.105
    type: modified
  id: 20220227T141710Z.344a14dfd6ecc6dbf247adf04326aad2d6bdc023
  log: |
    alpha: Fix placement of membar for sending ICCB message.

    While here, reduce it to membar_exit -- it's obviously not needed for
    store-before-load here (although alpha doesn't have anything weaker
    than the full sequential consistency `mb'), and although we do need a
    store-before-load (and load-before-load) to spin waiting for the CPU
    to wake up, that already happens a few lines below with alpha_mb in
    the loop anyway.  So no need for membar_sync, which is just `mb'
    under the hood -- deleting the membar_sync in this place can't hurt.

    The membar_sync had been inserted automatically when converting from
    an older style of atomic_ops(3) API.
  module: src
  subject: 'CVS commit: src/sys/arch/alpha/alpha'
  unixtime: '1645971430'
  user: riastradh