git: drm/linux: add atomic64_cmpxchg()

[Francois Tigeot]

commit a9e978f7d231d39b50a79cb8926a3b56d996658c
Author: zrj <rimvydas.jasinskas at gmail.com>
Date:   Tue Nov 15 20:19:33 2016 +0100

    drm/linux: add atomic64_cmpxchg()
    
    Found on github implemented by mattmacy@ FreeBSD repo

Summary of changes:
 sys/dev/drm/include/linux/atomic.h | 3 +++
 1 file changed, 3 insertions(+)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a9e978f7d231d39b50a79cb8926a3b56d996658c


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