Mark Johnston 9db0f8e76f Make the PHOLD in linux_wait_event_common() unconditional.
After some in-progress work is committed, this would otherwise be the only
instance of #if(n)def NO_SWAPPING in the tree. Moreover, the requisite
opt_vm.h include was missing, so the PHOLD/PRELE calls were always being
compiled in anyway.

MFC after:	1 week
2017-10-13 19:27:33 +00:00
..