---
- branch: MAIN
  date: Mon May 24 03:43:24 UTC 2021
  files:
  - new: '1.278'
    old: '1.277'
    path: src/sys/arch/alpha/alpha/pmap.c
    pathrev: src/sys/arch/alpha/alpha/pmap.c@1.278
    type: modified
  - new: '1.85'
    old: '1.84'
    path: src/sys/arch/alpha/include/pmap.h
    pathrev: src/sys/arch/alpha/include/pmap.h@1.85
    type: modified
  id: 20210524T034324Z.6ca4ac1915b8cbc660ec88249dc25b1440c685f8
  log: |
    pmap_tlb_shootdown_all_user() can be called in the PV scenario as well
    as the forward scenario, for example if a pmap_page_protect() to remove
    all mappings results in the freeing of a PT page.  It therefore needs
    to do the same reference counting dance as pmap_tlb_shootdown_pv().

    Also fix a use-after-free error in pmap_page_protect().

    Add / tweak some assertions, and shrink the pmap::pm_count field from
    long to unsigned int (which gave me a spare unsigned int field for
    debugging purposes).

    PR port-alpha/56201.
  module: src
  subject: 'CVS commit: src/sys/arch/alpha'
  unixtime: '1621827804'
  user: thorpej