K 10
svn:author
V 7
attilio
K 8
svn:date
V 27
2010-03-03T17:13:29.680352Z
K 7
svn:log
V 768
Improving the clocks auto-tunning by firstly checking if the atrtc may be
correctly initialized and just then assign to softclock/profclock.
Right now, some atrtc seems reporting strange diagnostic error* making the
current pattern bogus.

In order to do that cleanly, lapic_setup_clock(), on both ia32 and amd64,
now accepts as arguments the desired sources to handle, and returns the
actual ones (LAPIC_CLOCK_NONE is forbidden because otherwise there is no
meaning in calling such function).
This allows to bring out into commont x86 code the handling part for
machdep.lapic_allclocks tunable, which is retained.

Sponsored by:	Sandvine Incorporated
Tested by:	yongari, Richard Todd
		<rmtodd at ichotolot dot servalan dot com>
MFC:		3 weeks
X-MFC:		r202387, 204309

END