Mateusz Guzik cf558f10a7 Introduce __read_frequently
While __read_mostly groups variables together, their placement is not
specified. In particular 2 frequently used variables can end up in
different lines.

This annotation is only expected to be used for variables read all the time,
e.g. on each syscall entry.

MFC after:	1 week
2017-09-06 20:32:49 +00:00
..
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