mm/mempolicy: refactor a read-once mechanism into a function for re-use

Move the use of barrier() to force policy->nodemask onto the stack into a
function `read_once_policy_nodemask` so that it may be re-used.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Gregory Price <[email protected]>
Suggested-by: "Huang, Ying" <[email protected]>
Reviewed-by: "Huang, Ying" <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Hasan Al Maruf <[email protected]>
Cc: Honggyu Kim <[email protected]>
Cc: Hyeongtak Ji <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Rakie Kim <[email protected]>
Cc: Ravi Jonnalagadda <[email protected]>
Cc: Srinivasulu Thanneeru <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions