git: kernel - Adjust pv caching a little

[Matthew Dillon]

commit 67e78c75990f503286cfa00cf072bd05af3da682
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Thu May 3 21:58:40 2018 -0700

    kernel - Adjust pv caching a little
    
    * Rearrange pv_cache() usage to remove a conditional.
    
    * Use atomic_fcmpset_*() to improve performance a little.

Summary of changes:
 sys/platform/pc64/x86_64/pmap.c | 82 ++++++++++++++++++++---------------------
 1 file changed, 39 insertions(+), 43 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/67e78c75990f503286cfa00cf072bd05af3da682


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