Len Brown 447cc37695 ACPI: skip checking BM_STS if the BIOS doesn't ask for it ... commit 718be4aaf3 upstream. It turns out that there is a bit in the _CST for Intel FFH C3 that tells the OS if we should be checking BM_STS or not. Linux has been unconditionally checking BM_STS. If the chip-set is configured to enable BM_STS, it can retard or completely prevent entry into deep C-states -- as illustrated by turbostat: http://userweb.kernel.org/~lenb/acpi/utils/pmtools/turbostat/ ref: Intel Processor Vendor-Specific ACPI Interface Specification table 4 "_CST FFH GAS Field Encoding" Bit 1: Set to 1 if OSPM should use Bus Master avoidance for this C-state https://bugzilla.kernel.org/show_bug.cgi?id=15886 Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2010-08-02 10:21:24 -07:00
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acpi	ACPI: skip checking BM_STS if the BIOS doesn't ask for it	2010-08-02 10:21:24 -07:00
asm-generic	dma-mapping: fix dma_sync_single_range_*	2010-05-26 14:29:14 -07:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2009-09-11 09:38:37 -07:00
drm	drm/radeon/kms: add FireMV 2400 PCI ID.	2010-04-26 07:41:26 -07:00
keys	RxRPC: Use uX/sX rather than uintX_t/intX_t types	2009-09-16 00:01:13 -07:00
linux	ext4, jbd2: Add barriers for file systems with exernal journals	2010-08-02 10:21:10 -07:00
math-emu	math-emu: correct test for downshifting fraction in _FP_FROM_INT()	2010-08-02 10:20:44 -07:00
media	V4L/DVB (13019): video: initial support for ADV7180	2009-09-19 00:53:39 -03:00
mtd
net	sctp: Fix skb_over_panic resulting from multiple invalid parameter errors (CVE-2010-1173) (v4)	2010-07-05 11:11:14 -07:00
pcmcia	PM / yenta: Split resume into early and late parts (rev. 4)	2009-11-03 10:54:58 +01:00
rdma	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
rxrpc
scsi	SCSI: fc-transport: Use packed modifier for fc_bsg_request structure.	2010-04-26 07:41:30 -07:00
sound	Merge branch 'topic/ymfpci' into for-linus	2009-09-10 15:33:09 +02:00
trace	tracing: Fix ftrace_event_call alignment for use with gcc 4.5	2010-05-12 14:57:14 -07:00
video	davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-v4	2009-09-23 07:39:51 -07:00
xen
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