From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 9 Aug 2007 10:52:35 +0000 (+1000)
Subject: Fix non-TSC guest clocksource lockup
X-Git-Tag: v2.6.23-rc3~76
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37250097e1b730c30da1790e354c0da65e617043;p=pandora-kernel.git

Fix non-TSC guest clocksource lockup

lguest uses a host-supplied wallclock-based clocksource when the TSC
is not reliable.  As this is already in nanoseconds, I naively used a
multiplier of 1 and a shift of 0.

But update_wall_time() in its infinite wisdom decides to adjust the
clock a little (where does it think it's getting a more accurate time
from?)

It will happily tweak the multiplier... to 0, then -1.

So the "fix" is to use a shift of 22 like everyone else, and a
multiplier of 1 << 22.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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