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authorLen Brown <len.brown@intel.com>2009-04-21 00:50:11 -0400
committerLen Brown <len.brown@intel.com>2009-04-22 19:22:18 -0400
commita71e4917dc0ebbcb5a0ecb7ca3486643c1c9a6e2 (patch)
tree43bd9f429a954f30c3df8d3fd53c73588d135d04 /drivers/base/base.h
parent091069740304c979f957ceacec39c461d0192158 (diff)
ACPI: idle: mark_tsc_unstable() at init-time, not run-time
The c2 and c3 idle handlers check tsc_halts_in_c() after every time they return from idle. Um, when?:-) Move this check to init-time to remove the unnecessary run-time overhead, and also to have the check complete before the first entry into the idle handler. ff69f2bba67bd45514923aaedbf40fe351787c59 (acpi: fix of pmtimer overflow that make Cx states time incorrect) replaced the hard-coded use of the PM-timer inside idle, with ktime_get_readl(), which possibly uses the TSC -- so it is now especially prudent to detect a broken TSC before entering idle. http://bugzilla.kernel.org/show_bug.cgi?id=13087 Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/base/base.h')
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