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| author |   Len Brown <len.brown@intel.com> | 2009-04-21 00:50:11 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-04-22 19:22:18 -0400 |
| commit | a71e4917dc0ebbcb5a0ecb7ca3486643c1c9a6e2 (patch) | |
| tree | 43bd9f429a954f30c3df8d3fd53c73588d135d04 /lib/dma-debug.c | |
| parent | Linux 2.6.30-rc3 (diff) | |
| download | linux-rng-a71e4917dc0ebbcb5a0ecb7ca3486643c1c9a6e2.tar.xz linux-rng-a71e4917dc0ebbcb5a0ecb7ca3486643c1c9a6e2.zip | |
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 'lib/dma-debug.c')
0 files changed, 0 insertions, 0 deletions