Andriy Gapon f1fd3654e7 ZFS: unconditionally use atomic_swap_64
Previously, the code used a plain store on platforms that lacked
atomic_swap_64 and possibly some other platforms as the condition worked
only if atomic_swap_64 was a macro.

MFC after:	1 week
X-MFC after:	r353166, r353167
2019-10-07 08:00:54 +00:00
..
2019-10-04 16:17:00 +00:00