Philipp Zabel [Mon, 30 Jun 2008 17:11:35 +0000 (18:11 +0100)]
[ARM] 5137/1: magician: MACH_MAGICIAN doesn't need to depend on ARCH_PXA
It is only defined inside an "if ARCH_PXA ... endif" block, so the
depends on is not needed.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>? Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Thu, 26 Jun 2008 20:04:31 +0000 (21:04 +0100)]
[ARM] 5126/1: magician: remove superfluous mtd includes
These were only needed for hardcoded flash partition tables, which were
never submitted. It is better to have the bootloader pass the partition
table to the kernel instead.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Thu, 26 Jun 2008 20:03:54 +0000 (21:03 +0100)]
[ARM] 5125/1: magician: move gpio pin configuration into __initdata section
The pin configuration array is only used during board init.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5095/2: pcm990: switch from pxa_gpio_mode to pxa2xx_mfp_config
pxa_gpio_mode() is deprecated, use the new pxa2xx_mfp_config() function to
configure GPIOs in pcm990 platform code. Convert "array, ARRAY_SIZE(array)"
to "ARRAY_AND_SIZE(array)" while at it.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5143/1: pxa: further cleanup PXA Kconfig by removing one
unnecessary menu level
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5142/1: pxa: move move zaurus declarations to proper place
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5088/3: pxa2xx: add pxa2xx_set_spi_info to register pxa2xx-spi platform devices
Add a function to dynamically allocate and register pxa2xx-spi platform
devices, to be used by PXA2xx and PXA3xx based systems. Switch pcm027 and
lubbock to use it.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Mark Brown [Tue, 10 Jun 2008 09:48:25 +0000 (10:48 +0100)]
[ARM] 5084/1: zylonite: Register AC97 device
The Zylonite has an AC97 subsystem on it so register the AC97 controller
device.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Mark Brown [Tue, 10 Jun 2008 11:30:05 +0000 (12:30 +0100)]
[ARM] 5085/2: PXA: Move AC97 over to the new central device declaration model
As well as moving all the device declarations to a single one in devices.c
this causes all platforms to register the I/O and interrupt resources for
the AC97 controller.
Cc: eric miao <eric.miao@marvell.com> Cc: Mike Rapoport <mike@compulab.co.il> Cc: Lennert Buytenhek <buytenh@wantstofly.org> Cc: Jürgen Schindele <linux@schindele.name> Cc: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Sun, 22 Jun 2008 22:36:39 +0000 (23:36 +0100)]
[ARM] 5120/1: pxa: correct platform driver names for PXA25x and PXA27x UDC drivers
The pxa2xx_udc.c driver is renamed to pxa25x_udc.c (the platform
driver name changes from pxa2xx-udc to pxa25x-udc) and the
platform driver name of pxa27x_udc.c is fixed to pxa27x-udc.
pxa_device_udc in devices.c is split into pxa25x and pxa27x flavors
and the pxa27x_device_udc is enabled in pxa27x.c.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Nicolas Pitre <nico@cam.org> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Including from Ian Molton:
Fixes for mistakes left over from the PXA2{5,7}X UDC split.
Signed-off-by: Ian Molton <spyro@f2s.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Mon, 30 Jun 2008 18:47:59 +0000 (19:47 +0100)]
[ARM] pxa: allow clk aliases
We need to support more than one name+device for a struct clk for a
small number of peripherals. We do this by re-using struct clk alias
to another struct clk - IOW, if we find that the entry we're using is
an alias, we return the aliased entry not the one we found.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Stefan Schmidt [Fri, 6 Jun 2008 09:12:37 +0000 (10:12 +0100)]
[ARM] 5079/1: Warn people when using pxa2xx-gpio.h
Warn people when using pxa2xx-gpio.h as it is only here for backwards
compatibility. The new mfp-pxa2[57]x.h and the relevant API should be used
instead.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Mon, 30 Jun 2008 17:08:11 +0000 (18:08 +0100)]
[ARM] 5135/1: pxa: drop superfluous asm/arch/pxa2xx-gpio.h includes
Both i2c-pxa.c and irq.c still include pxa2xx-gpio.h although is is not
needed anymore.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Jaya Kumar [Sun, 22 Jun 2008 03:27:28 +0000 (04:27 +0100)]
[ARM] 5118/1: pxafb: add exit and remove handlers
This patch adds exit and remove handlers to pxafb so that it can be loaded
and unloaded as a module.
Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
eric miao [Mon, 26 May 2008 02:28:09 +0000 (03:28 +0100)]
[ARM] 5063/1: pxa: add clk support for pxa2xx I2S
Signed-off-by: Eric Miao <eric.miao@marvell.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5094/1: pcm990: Add framebuffer and backlight support
PCM990 boards can be assembled with either a Sharp STN or a NEC TFT LCD. This
patch adds support for these displays and for the backlight, using the pwm_bl
driver.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Thu, 22 May 2008 13:20:01 +0000 (14:20 +0100)]
[ARM] 5045/1: magician: use the pwm_bl driver for the LCD backlight
magician has a GPIO that modifies the brightness level additionally to
the PWM duty value. This patch makes use of the pwm_bl notify callback
to present userspace with a single brightness scale.
This gets rid of the pxa_set_cken calls and direct PWM register access.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Robert Jarzmik [Tue, 10 Jun 2008 22:02:31 +0000 (23:02 +0100)]
[ARM] 5087/1: Get the PWM layer to handle clock enable/disable properly.
Allow pwm_enable()/pwm_disable() to be called as many times
as the driver wants (and not even count them).
The PWM model is different from things like the clock API
where we need enable counting, because PWMs have one
exclusive user per PWM whereas the clock API can have
multiple users of the same clock.
Acked-by: eric miao <eric.miao@marvell.com> Signed-off-by: Robert Jarzmik <rjarzmik@free.fr> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5078/1: pxa-pwm: Add missing MODULE_LICENSE to be able to build the driver
as a module
Without a GPL-compatible license this driver cannot be built as a module,
because the platform_driver_* API is only exported to GPL modules.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Mon, 30 Jun 2008 17:09:03 +0000 (18:09 +0100)]
[ARM] 5136/1: pxa: fix PWM device order for pxa27x
Currently PWM0/2 (pxa27x_device_pwm0 at 0x40b00000 and 0x40b00010
are registered as as pwm_id 0 and 1, PWM1/3 (pxa27x_device_pwm1 at
0x40c00000 and 0x40c00010) are registered as pwm_id 2 and 3.
This patch corrects the pwm_ids to match the documented register names.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Stefan Schmidt [Tue, 10 Jun 2008 07:57:27 +0000 (08:57 +0100)]
[ARM] 5082/1: pxa: Definition for the third USB port control register UP3OCR
This adds the definition for the third USB port control register UP3OCR. It is
used on the EZX GSM mobile phones.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org> Acked-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Fri, 6 Jun 2008 17:40:47 +0000 (18:40 +0100)]
[ARM] 5080/1: touch PSSR_OTGPH only on pxa27x in ohci-pxa27x and pxa27x_udc
and include pxa2xx-regs.h as build fix since PSSR definitions
moved from pxa-regs.h into pxa2xx-regs.h.
Note: This change is temporary as pxa27x processor specific
code will be finally moved elsewhere (both drivers should
support pxa3xx, too).
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dmitry Baryshkov [Sat, 31 May 2008 15:14:48 +0000 (16:14 +0100)]
[ARM] 5071/2: Drop PXA_SHARPSL_25x/27x case from PXA Kconfig.
As nothing in the code references to the PXA_SHARPSL_25x/27x,
we can drop that Kconfig case and permit all-zaurus builds.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dmitry Baryshkov [Sat, 31 May 2008 15:17:32 +0000 (16:17 +0100)]
[ARM] 5073/1: spitz_pm: don't register devices on non-spitz machines
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dmitry Baryshkov [Sat, 31 May 2008 15:16:54 +0000 (16:16 +0100)]
[ARM] 5072/1: corgi_pm: don't register devices on non-corgi machines
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sun, 18 May 2008 13:59:36 +0000 (14:59 +0100)]
[ARM] pxa: separate out power manager and clock registers
The power manager and core clock registers aren't present in PXA3
CPUs. Move them out of pxa-regs.h into pxa2xx-regs.h, and include
pxa2xx-regs.h where necessary.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Thu, 24 Apr 2008 14:28:11 +0000 (15:28 +0100)]
[ARM] pxa: avoid kfreeing static data if platform device fails to register
When a dynamically allocated platform device is 'put', the platform
device's platform_data is kfree'd. This is bad if it's pointing at
static data. Use the provided function to register platform data
for these devices.
This also means we can mark the pcmcia ops structures as __initdata.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
cm_x270 and mainstone both register their PCMCIA devices using the same
name, resulting in a warning message from the kernel. Avoid this by
making the cm_x270 and mainstone PCMCIA initialisation conditional on
the machine type we're running on.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Thu, 24 Apr 2008 14:13:36 +0000 (15:13 +0100)]
[ARM] pxa: don't register lpd270 cpld_irq sysdev if !lpd270
Don't register the LPD270 cpld_irq system device when we're not running
on a LPD270 machine - "cpld_irq" is also registered (separately) by
Lubbock and Mainstone.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Dmitry Baryshkov [Sat, 31 May 2008 15:18:11 +0000 (16:18 +0100)]
[ARM] 5074/1: fix warning: missing terminating ' character
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sun, 20 Apr 2008 16:32:16 +0000 (17:32 +0100)]
[ARM] pxa: separate PXA25x and PXA27x UDC register definitions
The PXA25x and PXA27x USB device controller register definitions are
different. Currently, they live side by side in pxa-regs.h, but only
one set is available depending on the setting of PXA25x or PXA27x.
This means that if we build to support both PXA25x and PXA27x, the
PXA27x definitions are unavailable, even to PXA27x specific code.
Remove these definitions from pxa-regs.h, and place them in separate
files. Include these files where appropriate.
Note: according to the dependencies in drivers/usb/gadget/Kconfig,
we do not support the UDC on PXA27x nor PXA3xx CPUs, so remove the
platform devices from pxa27x.c and pxa3xx.c.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sun, 20 Apr 2008 16:15:32 +0000 (17:15 +0100)]
[ARM] pxa: corgibl_limit_intensity build errors
If CONFIG_BACKLIGHT_CORGI is not selected, then corgibl_limit_intensity()
is not present. However, both corgi_pm.c and sharp_pm.c reference this
symbol, resulting in a link error.
Wrap the references with the relevant ifdefs, and avoid the resulting
NULL pointer dereference by making the code in sharpsl_pm.c also
conditional on the config symbol.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
eric miao [Sun, 13 Apr 2008 20:44:04 +0000 (21:44 +0100)]
[ARM] pxa: Add PXA support for PWM API
Patch mainly from Eric Miao, with minor edits by rmk.
Note: PWM0 and PWM2 share the same register I/O space and clock gating
on pxa{27x, 3xx}, thus PWM2 is treated in the driver as a child PWM of
PWM0. And this is also true for PWM1/3.
Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Linus Torvalds [Sun, 18 May 2008 20:56:54 +0000 (13:56 -0700)]
Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
i2c/max6875: Really prevent 24RF08 corruption
i2c-amd756: Fix functionality flags
i2c: Kill the old driver matching scheme
i2c: Convert remaining new-style drivers to use module aliasing
i2c: Switch pasemi to the new device/driver matching scheme
i2c: Clean up Blackfin BF527 I2C device declarations
i2c-nforce2: Disable the second SMBus channel on the DFI Lanparty NF4 Expert
i2c: New co-maintainer
Add multi_defconfig, to build a kernel for all supported m68k platforms,
excluding Sun 3 (Sun 3 kernels are incompatible with all other m68k platforms)
The *_ISA type defines are quite generic and cause namespace conflicts
(e.g. with `AMIGAHW_DECLARE(GG2_ISA)' in <asm/amigahw.h>) for some kernel
configurations. Use ISA_TYPE_* to avoid such conflicts.
Use `__builtin_trap()' instead of `asm volatile("illegal")' in the m68k BUG()
macros (as suggested by Andrew Pinski), to kill warnings in code that assumes
BUG() does not return.
m68k: FB_HP300 depends on DIO and doesnt need FB_CFB_FILLRECT
Correct FB_HP300 dependencies:
- FB_HP300 doesn't depend only on HP300, but also on DIO (which depends on
HP300)
- FB_HP300 does not need FB_CFB_FILLRECT
Jean Delvare [Sun, 18 May 2008 18:49:41 +0000 (20:49 +0200)]
i2c/max6875: Really prevent 24RF08 corruption
i2c-core takes care of the possible corruption of 24RF08 chips for
quite some times, so device devices no longer need to do it. And they
really should not, as applying the prevention twice voids it.
I thought that I had fixed all drivers long ago but apparently I had
missed that one.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ben Gardner <bgardner@wabtec.com>
Jean Delvare [Sun, 18 May 2008 18:49:40 +0000 (20:49 +0200)]
i2c: Convert remaining new-style drivers to use module aliasing
Update all the remaining new-style i2c drivers to use standard module
aliasing instead of the old driver_name/type driver matching scheme.
Note that the tuner driver is a bit quirky at the moment, as it
overwrites i2c_client.name with arbitrary strings. We write "tuner"
back on remove, to make sure that driver cycling will work properly,
but there may still be troublesome corner cases.
Jean Delvare [Sun, 18 May 2008 18:49:40 +0000 (20:49 +0200)]
i2c-nforce2: Disable the second SMBus channel on the DFI Lanparty NF4 Expert
There is a strange chip at 0x2e on the second SMBus channel of the
DFI Lanparty NF4 Expert motherboard. Accessing the chip reboots the
system. As there's nothing interesting on this SMBus channel, the
easiest and safest thing to do is to disable it on that board.
This is a better fix to bug #5889 than the it87 driver update that was
done originally:
http://bugzilla.kernel.org/show_bug.cgi?id=5889
Jean Delvare [Sun, 18 May 2008 18:49:40 +0000 (20:49 +0200)]
i2c: New co-maintainer
Ben Dooks agreed to become my co-maintainer for the i2c subsystem. In
particular, Ben will help with drivers for embedded systems, of which
my experience is inexistent. Thanks Ben and welcome on board!
Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Ben Dooks <ben-linux@fluff.org>
[ARM] fix parenthesis in include/asm-arm/arch-omap/control.h
Parenthesis fix in include/asm-arm/arch-omap/control.h
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Paul Walmsley <paul@pwsan.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Michael Abbott [Wed, 14 May 2008 23:29:24 +0000 (16:29 -0700)]
[ARM] colibri: fix support for DM9000 ethernet device
Two changes are necessary to enable proper operation of the DM9000 device with
the Colibri PXA 270 board: firstly, the IRQ type needs to be configured for
rising edge interrupts, and secondly this configuration needs to be
communicated through to the DM9000.
[akpm@linux-foundation.org: remove set_irq_type() call as per ben-linux request] Signed-off-by: Michael Abbott <michael.abbott@diamond.ac.uk> Cc: Daniel Mack <daniel@caiaq.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5037/1: Orion: fix DNS323/Kurobox Pro PCI initialisation
Whereas most Orion 5x machine support code would initialise the PCI
subsystem with nr_controllers in their struct hw_pci set to 2, the
DNS323 and Kurobox Pro machine support code had nr_controllers set
to 1.
This was presumably done because on those two machines, the PCI(-X)
controller (nr == 1) isn't used, requiring initialisation of only
the PCIe controller (nr == 0.) However, not initialising the PCI(-X)
controller on boards that don't use it leads to a situation where
both the PCIe and the PCI(-X) controller think that their root bus is
zero, and it messes up IRQ assignment.
This patch changes the DNS323 and Kurobox Pro support code to always
use nr_controllers == 2.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[ARM] 5034/1: fix arm{925,926,940,946} dma_flush_range() in WT mode
The CPU's dma_flush_range() operation needs to clean+invalidate the
given memory area if the cache is in writeback mode, or do just the
invalidate part if the cache is in writethrough mode, but the current
proc-arm{925,926,940,946} (incorrectly) do a cache clean in the
latter case. This patch fixes that.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Linus Torvalds [Sat, 17 May 2008 21:21:43 +0000 (14:21 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: disable mwait for AMD family 10H/11H CPUs
x86: fix crash on cpu hotplug on pat-incapable machines
x86: remove mwait capability C-state check
It depends on the CPU. For AMD CPUs that support MWAIT this is wrong.
Family 0x10 and 0x11 CPUs will enter C1 on HLT. Powersavings then
depend on a clock divisor and current Pstate of the core.
If all cores of a processor are in halt state (C1) the processor can
enter the C1E (C1 enhanced) state. If mwait is used this will never
happen.
Thus HLT saves more power than MWAIT here.
It might be best to switch off the mwait flag for these AMD CPU
families like it was introduced with commit f039b754714a422959027cb18bb33760eb8153f0 (x86: Don't use MWAIT on AMD
Family 10)
Re-add the AMD families 10H/11H check and disable the mwait usage for
those.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Avi Kivity [Wed, 14 May 2008 09:20:32 +0000 (12:20 +0300)]
x86: fix crash on cpu hotplug on pat-incapable machines
pat_disable() is __init, which means it goes away after booting is complete.
Unfortunately it is used by the hotplug code if the machine is not
pat-capable, causing a crash.
Fix by marking pat_disable() as __cpuinit.
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Wed, 14 May 2008 06:47:40 +0000 (08:47 +0200)]
x86: remove mwait capability C-state check
Vegard Nossum reports:
| powertop shows between 200-400 wakeups/second with the description
| "<kernel IPI>: Rescheduling interrupts" when all processors have load (e.g.
| I need to run two busy-loops on my 2-CPU system for this to show up).
|
| The bisect resulted in this commit:
|
| commit 0c07ee38c9d4eb081758f5ad14bbffa7197e1aec
| Date: Wed Jan 30 13:33:16 2008 +0100
|
| x86: use the correct cpuid method to detect MWAIT support for C states
remove the functional effects of this patch and make mwait unconditional.
A future patch will turn off mwait on specific CPUs where that causes
power to be wasted.
projects / linux-beck.git / log