K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-03-29T19:54:13.035108Z
K 7
svn:log
V 569
Fix several bugs in r297374:
- fix UP build [1]
- do not obliterate initial reading of rdtsc by the loop counter [2]
- restore the meaning of the argument -1 to native_lapic_ipi_wait()
  as wait until LAPIC acknowledge without timeout
- correct formula for calculating loop iteration count for 1us, it was
  inverted, and ensure that even on unlikely slow CPUs at least one
  check for ack is performed.

Reported by:	Michael Butler <imb@protected-networks.net> [1], rpokala[2],
	jhb[3]
Tested by:	Michael Butler
Pointy hat to:	kib
Sponsored by:	The FreeBSD Foundation

END