[PATCH] powerpc/rtas: retry when cpu offline races with suspend/migration

[Nathan Lynch]

Hi Michael,

Nathan Lynch <nathanl at linux.ibm.com> writes:
> The protocol for suspending or migrating an LPAR requires all present
> processor threads to enter H_JOIN. So if we have threads offline, we
> have to temporarily bring them up. This can race with administrator
> actions such as SMT state changes. As of dfd718a2ed1f ("powerpc/rtas:
> Fix a potential race between CPU-Offline & Migration"),

snowpatch/checkpatch flagged an error in my commit message here:

  ERROR:GIT_COMMIT_ID: Please use git commit description style 'commit
  <12+ chars of sha1> ("<title line>")' - ie: 'commit dfd718a2ed1f
  ("powerpc/rtas: Fix a potential race between CPU-Offline &
  Migration")'

I see this is in your next-test branch though. Should I fix the commit
message and resend?