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Konrad Rzeszutek Wilk c705c78c0d acpi: Export the acpi_processor_get_performance_info 
The git commit d5aaffa9dd
(cpufreq: handle cpufreq being disabled for all exported function)
tightens the cpufreq API by returning errors when disable_cpufreq()
had been called.

The problem we are hitting is that the module xen-acpi-processor which
uses the ACPI's functions: acpi_processor_register_performance,
acpi_processor_preregister_performance, and acpi_processor_notify_smm
fails at acpi_processor_register_performance with -22.

Note that earlier during bootup in arch/x86/xen/setup.c there is also
an call to cpufreq's API: disable_cpufreq().

This is b/c we want the Linux kernel to parse the ACPI data, but leave
the cpufreq decisions to the hypervisor.

In v3.9 all the checks that d5aaffa9dd
added are now hit and the calls to cpufreq_register_notifier will now
fail. This means that acpi_processor_ppc_init ends up printing:

"Warning: Processor Platform Limit not supported"

and the acpi_processor_ppc_status is not set.

The repercussions of that is that the call to
acpi_processor_register_performance fails right away at:

	if (!(acpi_processor_ppc_status & PPC_REGISTERED))

and we don't progress any further on parsing and extracting the _P*
objects.

The only reason the Xen code called that function was b/c it was
exported and the only way to gather the P-states. But we can also
just make acpi_processor_get_performance_info be exported and not
use acpi_processor_register_performance. This patch does so.

Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-03-06 10:00:34 -05:00
..
accessibility
acpi acpi: Export the acpi_processor_get_performance_info 2013-03-06 10:00:34 -05:00
amba
ata Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
atm
auxdisplay
base pm / runtime: force memory allocation with no I/O during Runtime PM callbcack 2013-02-23 17:50:16 -08:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
block Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
bus
cdrom
char Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-02-22 19:25:09 -08:00
clk arm-soc: device tree conversions 2013-02-21 15:38:49 -08:00
clocksource arm-soc: virtualization changes 2013-02-21 15:40:16 -08:00
connector net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
cpufreq arm-soc: driver specific changes 2013-02-21 15:12:18 -08:00
cpuidle arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
crypto
dca
devfreq
dio
dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
edac Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
eisa
extcon Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
firmware memory-hotplug: remove /sys/firmware/memmap/X sysfs 2013-02-23 17:50:12 -08:00
gpio Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-02-21 17:54:03 -08:00
gpu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-02-21 17:41:38 -08:00
hsi
hv Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
hwmon ACPI and power management updates for 3.9-rc1 2013-02-20 11:26:56 -08:00
hwspinlock
i2c arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
ide Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
idle Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-02-22 19:25:09 -08:00
iio Staging tree update for 3.9-rc1 2013-02-21 12:11:44 -08:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
input arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
iommu Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
ipack Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
irqchip arm-soc: cleanups 2013-02-21 14:58:40 -08:00
isdn Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
leds
lguest tty/serial patches for 3.9-rc1 2013-02-21 13:41:04 -08:00
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
mailbox
md drivers/md/persistent-data/dm-transaction-manager.c: rename HASH_SIZE 2013-02-23 17:50:08 -08:00
media Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-02-21 17:54:03 -08:00
memory
memstick
message
mfd arm-soc: driver specific changes 2013-02-21 15:12:18 -08:00
misc Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
mmc Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
mtd arm-soc: device tree conversions 2013-02-21 15:38:49 -08:00
net Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2013-02-18 13:47:13 -05:00
ntb
nubus
of Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
oprofile
parisc parisc: led driver requires CONFIG_VM_EVENT_COUNTERS 2013-02-20 22:51:52 +01:00
parport Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-02-21 17:54:03 -08:00
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-02-21 17:54:03 -08:00
pcmcia Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
pinctrl arm-soc: device tree conversions 2013-02-21 15:38:49 -08:00
platform Staging tree update for 3.9-rc1 2013-02-21 12:11:44 -08:00
pnp
power Staging tree update for 3.9-rc1 2013-02-21 12:11:44 -08:00
pps
ps3
ptp
pwm
rapidio
regulator Merge remote-tracking branch 'regulator/topic/tps65090' into regulator-next 2013-02-19 12:43:12 +00:00
remoteproc arm-soc: multiplatform support 2013-02-21 15:20:41 -08:00
rpmsg Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
rtc Merge branch 'akpm' (incoming from Andrew) 2013-02-21 17:38:49 -08:00
s390 Merge tag 'kvm-3.9-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-02-24 13:07:18 -08:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
sfi
sh
sn
spi arm-soc: soc-specific updates 2013-02-21 15:27:22 -08:00
ssb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2013-02-14 14:23:33 -05:00
staging mm: rename page struct field helpers 2013-02-23 17:50:18 -08:00
target Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-02-21 17:40:58 -08:00
tc
thermal
tty Features: 2013-02-24 16:18:31 -08:00
uio uio: remove !S390 dependency from Kconfig 2013-02-14 15:55:18 +01:00
usb Merge branch 'akpm' (more incoming from Andrew) 2013-02-23 17:50:35 -08:00
uwb
vfio
vhost Driver core patches for 3.9-rc1 2013-02-21 12:05:51 -08:00
video Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
virt
virtio
vlynq
vme vme: add missing put_device() after device_register() fails 2013-02-14 09:24:14 -08:00
w1 Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
watchdog
xen acpi: Export the acpi_processor_get_performance_info 2013-03-06 10:00:34 -05:00
zorro
Kconfig Char/Misc driver patches for 3.9-rc1 2013-02-21 13:57:13 -08:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00