The basic GPIO controllers may be found in various on-board FPGA and ASIC
solutions that are used to control board's switches, LEDs, chip-selects,
Ethernet/USB PHY power, etc.

These controllers may not provide any means of pin setup
(in/out/open drain).

The driver supports:
- 8/16/32/64 bits registers;
- GPIO controllers with clear/set registers;
- GPIO controllers with a single "data" register;
- Big endian bits/GPIOs ordering (mostly used on PowerPC).
Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>
Reviewed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Samuel Ortiz <sameo@linux.intel.com>,
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add the "alarm" function to the jz4740 RTC.  Interrupts will now be raised
when the "alarm" time is reached.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The DS3232 RTC driver only has the tick function.  Add an alarm function
so the driver is complete.
Signed-off-by: NLan Chunhe-B25806 <b25806@freescale.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add "rtc_valid_tm" in s3c_rtc_gettime() as per Wan ZongShun's suggestion.
Suggested-by: NWan ZongShun <mcuos.com@gmail.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Change RTC initialization method in probe().  The 'rtc_valid_tm(tm)' can
check whether RTC BCD is valid or not.  And change the method of checking
because the previous method cannot validate RTC BCD registers properly.
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix debug message format.
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NBen Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The alarm_irq_enable function should be implemented to support RTC alarm.
And fix tabs instead of white space around the proc field.
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NBen Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Current s3c_rtc_getalarm() sets missing field of alarm time with 0xff.
But this value should be -1 according to drivers/rtc/interface.c.
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NBen Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

S3C2410_RTCCON of TYPE_S3C64XX RTC should be read/written by readw and
writew, because TYPE_S3C64XX RTC uses bit 8 and 9.  And TYPE_S3C2410 RTC
also can access it by readw and writew.

[atul.dahiya@samsung.com: tested on smdk2416]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: NChanghwan Youn <chaos.youn@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>
Tested-by: NAtul Dahiya <atul.dahiya@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The rtc-omap driver currently hardcodes the RTC wakeup capability to be
"not capable".  While this seems to be true for existing OMAP1 boards
which are not wired for this, the DA850/OMAP-L138 SoC, the RTC can always
be wake up source from its "deep sleep" mode.

This patch lets the wakeup capability be set from platform data and does
not override the setting from the driver.  For DA850/OMAP-L138, this is
done from arch/arm/mach-davinci/devices-da8xx.c:da8xx_register_rtc()

Note that this patch does not change the behavior on any existing OMAP1
board since the platform device registration sets the wakeup capability to
0 by default.
Signed-off-by: NSekhar Nori <nsekhar@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

If device_register() fails then call put_device().  See comment to
device_register.
Signed-off-by: NVasiliy Kulikov <segooon@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The rest of the driver had debug markings already.  This also standardizes
the usage of "dev" a bit.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

By unifying the RTC_ISTAT clearing steps, we shrink the interrupt handler
and avoid multiple writes to the hardware registers.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add an RTC driver for the built-in RTC in the LPC32XX SoC.  This patch
includes updates from the initial review comments and updates from the v3
review.
Signed-off-by: NKevin Wells <wellsk40@gmail.com>
Signed-off-by: NDurgesh Pattamatta <durgesh.pattamatta@nxp.com>
Reviewed-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When all VT's are in use, VT_OPENQRY casts -1 to unsigned char before
returning it to userspace as an int.  VT255 is not the next available
console.
Signed-off-by: NGraham Gower <graham.gower@gmail.com>
Cc: Greg KH <greg@kroah.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Put basic system information in the dmesg log.  There are lots of dmesg
logs on the web, and it would be useful if they contained this information
for debugging platform problems.  "BOARD/PRODUCT" format copied from
show_regs_common(), which is used in the oops path.
Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

usbfs_get_inode() is something completely different...

Bogosity introduced by commit 85fe4025 ("fs: do not assign default
i_ino in new_inode").
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Use Ben's new range manager hooks to implement a manager for
GMRs that manages ids rather than ranges.
This means we can use the standard TTM code for binding, unbinding and
eviction.
Signed-off-by: NThomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

broken by:
drm/radeon/r600: fix tiling issues in CS checker.

v2: only apply it to 1D tiling case.
Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Do not enable this Kconfig menu by default since it contains devices not
present on the majority of systems.

This is becoming a pain and a waste of time especially when doing a bunch
of kernel builds on different systems daily and have to answer "make
oldconfig" prompts for strange devices.
Signed-off-by: NBorislav Petkov <bp@alien8.de>
Acked-by: NMike Frysinger <vapier@gentoo.org>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Cc: Andres Salomon <dilinger@collabora.co.uk>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Update the driver for the needed runtime power features.  Remove the old
user controlled power functions.

[akpm@linux-foundation.org: put PM code under CONFIG_PM]
Signed-off-by: NHong Liu <hong.liu@intel.com>
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This adds support for the ADPS9802ALS sensor.

Cleanup by Alan Cox
	- move mutexes to cover more things
	- report I/O errors back to user space
	- report range and values in LUX
Signed-off-by: NAnantha Narayanan <anantha.narayanan@intel.com>
[The 4K and 64K in the hw spec actually means 4095 (12bit) and 65535 (16bit).]
Signed-off-by: NHong Liu <hong.liu@intel.com>
[Updated to match the ALS light API interface convention from Samu]
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Acked-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Our Moorestown platform has two max7315 chips which is covered by pca953x
i2c gpio driver.

A while ago this driver got updated with nested irq thread support, and it
broke the compatibity with "request_irq".  For example, the gpio_keys.c
driver can not work with this driver now.  This patch fixes the issue by
switching to generic_handle_irq.

Also fix the irq_base issue: irq_base == 0 is valid, and a "-1" value
should mean invalid. IRQ 0 is not a valid IRQ, irq_base of 0 is valid.
Signed-off-by: NAlek Du <alek.du@intel.com>
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The LS driver will read the latest Lux measurement based upon the light
brightness and will report the LUX output through sysfs interface.

This hardware isn't quite the same as the ISL29003 so has a different
driver.

[akpm@linux-foundation.org: put PM code under #ifdef CONFIG_PM]
Signed-off-by: NKalhan Trisal <kalhan.trisal@intel.com>
[Runtime power management support added]
Signed-off-by: NArjan van de Ven <arjan@linux.intel.com>
[Fixes to runtime PM]
Signed-off-by: NLiu Hong <hong.liu@intel.com>
[Cleanups and added checks for I2C errors, reworked the API to match the
 saner one agreed for other sensors]
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Prefix cname and ctype constants with CN/CT_.  This is especially for the
conflict on BUG which causes a build break if arch defines it as a inline
function, i.e.  MIPS.
Signed-off-by: NNamhyung Kim <namhyung@gmail.com>
Cc: Ankita Garg <ankita@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This is a driver for Avago APDS990X combined ALS and proximity sensor.

Interface is sysfs based.  The driver uses interrupts to provide new data.
The driver supports pm_runtime and regulator frameworks.

See Documentation/misc-devices/apds990x.txt for details
Signed-off-by: NSamu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This is a driver for ROHM BH1770GLC and OSRAM SFH7770 combined ALS and
proximity sensor.

Interface is sysfs based.  The driver uses interrupts to provide new data.
 The driver supports pm_runtime and regulator frameworks.

See Documentation/misc-devices/bh1770glc.txt for details
Signed-off-by: NSamu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The ad5251/ad5252 devices have rdac1 and rdac3, but no rdac0.  So make
sure we use the right channels so userspace gets correct data and not just
garbage.
Signed-off-by: Nsteven miao <realmz6@gmail.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Cc: Chris Verges <chrisv@cyberswitching.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add support for AD5270, AD5271, AD5272, AD5274 digital potentiometers.
Add 20-TP feature for AD5291 and AD5292 parts, and update feature list.
AD5291 rdac read back must be shifted by two.
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Chris Verges <chrisv@cyberswitching.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There is no runtime effect by this change.  It frees up namespace for
defines erroneously used.  This is required to actually support devices
requiring the namespace, added with "drivers/misc/ad525x_dpot.c: new
features".

All defines touched have the same value defined, after the change.
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Chris Verges <chrisv@cyberswitching.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

phantom_probe() can fail in many places.  Add missing warning messages in
pci_enable_device() and pci_request_regions().
Signed-off-by: NRahul Ruikar <rahul.ruikar@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Silly though it is, completions and wait_queue_heads use foo_ONSTACK
(COMPLETION_INITIALIZER_ONSTACK, DECLARE_COMPLETION_ONSTACK,
__WAIT_QUEUE_HEAD_INIT_ONSTACK and DECLARE_WAIT_QUEUE_HEAD_ONSTACK) so I
guess workqueues should do the same thing.

s/INIT_WORK_ON_STACK/INIT_WORK_ONSTACK/
s/INIT_DELAYED_WORK_ON_STACK/INIT_DELAYED_WORK_ONSTACK/

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Use the new {max,min}3 macros to save some cycles and bytes on the stack.
This patch substitutes trivial nested macros with their counterpart.
Signed-off-by: NHagen Paul Pfeifer <hagen@jauu.net>
Cc: Joe Perches <joe@perches.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Structure info is copied to userland with some padding fields unitialized.
It leads to leaking of stack memory.

[akpm@linux-foundation.org: remove now-unneeded zeroing of info->hi_ireqfreq]
Signed-off-by: NVasiliy Kulikov <segooon@gmail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix the following style problems:

WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
WARNING: Use #include <linux/io.h> instead of <asm/io.h>
ERROR: code indent should use tabs where possible
ERROR: do not initialise statics to 0 or NULL
Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Jaswinder Singh Rajput wrote:
> By executing Documentation/timers/hpet_example.c
>
> for polling, I requested for 3 iterations but it seems iteration work
> for only 2 as first expired time is always very small.
>
> # ./hpet_example poll /dev/hpet 10 3
> -hpet: executing poll
> hpet_poll: info.hi_flags 0x0
> hpet_poll: expired time = 0x13
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1
> hpet_poll: expired time = 0x1868c
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1
> hpet_poll: expired time = 0x18645
> hpet_poll: revents = 0x1
> hpet_poll: data 0x1

Clearing the HPET interrupt enable bit disables interrupt generation
but does not disable the timer, so the interrupt status bit will still
be set when the timer elapses.  If another interrupt arrives before
the timer has been correctly programmed (due to some other device on
the same interrupt line, or CONFIG_DEBUG_SHIRQ), this results in an
extra unwanted interrupt event because the status bit is likely to be
set from comparator matches that happened before the device was opened.

Therefore, we have to ensure that the interrupt status bit is and
stays cleared until we actually program the timer.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Reported-by: NJaswinder Singh Rajput <jaswinderlinux@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Bob Picco <bpicco@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When the initialization code in hpet finds a memory resource and does not
find an IRQ, it does not unmap the memory resource previously mapped.

There are buggy BIOSes which report resources exactly like this and what
is worse the memory region bases point to normal RAM.  This normally would
not matter since the space is not touched.  But when PAT is turned on,
ioremap causes the page to be uncached and sets this bit in page->flags.

Then when the page is about to be used by the allocator, it is reported
as:

BUG: Bad page state in process md5sum  pfn:3ed00
page:ffffea0000dbd800 count:0 mapcount:0 mapping:(null) index:0x0
page flags: 0x20000001000000(uncached)
Pid: 7956, comm: md5sum Not tainted 2.6.34-12-desktop #1
Call Trace:
 [<ffffffff810df851>] bad_page+0xb1/0x100
 [<ffffffff810dfa45>] prep_new_page+0x1a5/0x1c0
 [<ffffffff810dfe01>] get_page_from_freelist+0x3a1/0x640
 [<ffffffff810e01af>] __alloc_pages_nodemask+0x10f/0x6b0
...

In this particular case:

1) HPET returns 3ed00000 as memory region base, but it is not in
reserved ranges reported by the BIOS (excerpt):
 BIOS-e820: 0000000000100000 - 00000000af6cf000 (usable)
 BIOS-e820: 00000000af6cf000 - 00000000afdcf000 (reserved)

2) there is no IRQ resource reported by HPET method. On the other
hand, the Intel HPET specs (1.0a) says (3.2.5.1):
_CRS (
  // Report 1K of memory consumed by this Timer Block
  memory range consumed
  // Optional: only used if BIOS allocates Interrupts [1]
  IRQs consumed
)

[1] For case where Timer Block is configured to consume IRQ0/IRQ8 AND
Legacy 8254/Legacy RTC hardware still exists, the device objects
associated with 8254 & RTC devices should not report IRQ0/IRQ8 as
"consumed resources".

So in theory we should check whether if it is the case and use those
interrupts instead.

Anyway the address reported by the BIOS here is bogus, so non-presence
of IRQ doesn't mean the "optional" part in point 2).

Since I got no reply previously, fix this by simply unmapping the space
when IRQ is not found and memory region was mapped previously.  It would
be probably more safe to walk the resources again and unmap appropriately
depending on type.  But as we now use only ioremap for both 2 memory
resource types, it is not necessarily needed right now.

Addresses https://bugzilla.novell.com/show_bug.cgi?id=629908Reported-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Acked-by: NClemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Keep the current interface but ignore the KM_type and use a stack based
approach.

The advantage is that we get rid of crappy code like:

	#define __KM_PTE			\
		(in_nmi() ? KM_NMI_PTE : 	\
		 in_irq() ? KM_IRQ_PTE :	\
		 KM_PTE0)

and in general can stop worrying about what context we're in and what kmap
slots might be appropriate for that.

The downside is that FRV kmap_atomic() gets more expensive.

For now we use a CPP trick suggested by Andrew:

  #define kmap_atomic(page, args...) __kmap_atomic(page)

to avoid having to touch all kmap_atomic() users in a single patch.

[ not compiled on:
  - mn10300: the arch doesn't actually build with highmem to begin with ]

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c]
Acked-by: NRik van Riel <riel@redhat.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: NChris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Ensure kmap_atomic() usage is strictly nested
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: NRik van Riel <riel@redhat.com>
Acked-by: NChris Metcalf <cmetcalf@tilera.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

For NUMA node systems it is important to have visibility in memory
characteristics.  Two of the /proc/vmstat values "nr_written" and
"nr_dirtied" are added here.

	# cat /sys/devices/system/node/node20/vmstat
	nr_written 0
	nr_dirtied 0
Signed-off-by: NMichael Rubin <mrubin@google.com>
Reviewed-by: NWu Fengguang <fengguang.wu@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>