mm/page_ref: use atomic_set_release in page_ref_unfreeze
authorKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
Thu, 5 Apr 2018 23:23:24 +0000 (16:23 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 6 Apr 2018 04:36:25 +0000 (21:36 -0700)
commit03f5d58fa42fb337b921e57f8e2c2d4df7df890d
tree57b248af904e4492b071446ae4b27f19df05c3d5
parente92bb4dd9673945179b1fc738c9817dd91bfb629
mm/page_ref: use atomic_set_release in page_ref_unfreeze

page_ref_unfreeze() has exactly that semantic.  No functional changes:
just minus one barrier and proper handling of PPro errata.

Link: http://lkml.kernel.org/r/151844393004.210639.4672319312617954272.stgit@buzz
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/page_ref.h