Identity mapping for IOMMU defines a single domain to 1:1 map all PCI
devices to all usable memory.
This reduces map/unmap overhead in DMA API's and improve IOMMU
performance. On 10Gb network cards, Netperf shows no performance
degradation compared to non-IOMMU performance.
This method may lose some of DMA remapping benefits like isolation.
The patch sets up identity mapping for all PCI devices to all usable
memory. In the DMA API, there is no overhead to maintain page tables,
invalidate iotlb, flush cache etc.
32 bit DMA devices don't use identity mapping domain, in order to access
memory beyond 4GiB.
When kernel option iommu=pt, pass through is first tried. If pass
through succeeds, IOMMU goes to pass through. If pass through is not
supported in hw or fail for whatever reason, IOMMU goes to identity
mapping.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Calling mcheck_init() on resume is required only with
CONFIG_X86_OLD_MCE=y.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Acked-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
On bootup nvidiafb prints the following on my Apple G5:
nvidiafb: CRTC 1appears to have a CRT attached
There should be a space between the '1' and the 'appears'. Add it.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the incorrect "select" directives by dropping the "CONFIG_"
prefixes, and correcting the typo "H8S2768" to "H8S2678".
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Acked-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After downing/upping a cpu, an attempt to set
/proc/sys/vm/percpu_pagelist_fraction results in an oops in
percpu_pagelist_fraction_sysctl_handler().
If a processor is downed then we need to set the pageset pointer back to
the boot pageset.
Updates of the high water marks should not access pagesets of unpopulated
zones (those pointer go to the boot pagesets which would be no longer
functional if their size would be increased beyond zero).
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After the recent changes that went into mm/vmscan.c to overhaul stuff, we
ended up with these warnings on no-mmu systems:
mm/vmscan.c: In function `shrink_page_list':
mm/vmscan.c:580: warning: unused variable `vm_flags'
mm/vmscan.c: In function `shrink_active_list':
mm/vmscan.c:1294: warning: `vm_flags' may be used uninitialized in this function
mm/vmscan.c:1242: note: `vm_flags' was declared here
This is because the no-mmu function defines page_referenced() to work on
the first argument only (the page). It does not clear the vm_flags given
to it because for no-mmu systems, they never actually get utilized. Since
that is no longer strictly true, we need to set vm_flags to 0 like
everyone else so gcc can do proper dead code elimination without annoying
us with unused warnings.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Acked-by: David McCullough <davidm@snapgear.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a kthread happens to use get_user_pages() on an mm (as KSM does),
there's a chance that it will end up trying to read in a swap page, then
oops in grab_swap_token() because the kthread has no mm: GUP passes down
the right mm, so grab_swap_token() ought to be using it.
We have not identified a stronger case than KSM's daemon (not yet in
mainline), but the issue must have come up before, since RHEL has included
a fix for this for years (though a different fix, they just back out of
grab_swap_token if current->mm is unset: which is what we first proposed,
but using the right mm here seems more correct).
Reported-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There already is a "default-on" trigger but there are problems with it.
For one, it's a inefficient way to do it and requires led trigger support
to be compiled in.
But the real reason is that is produces a glitch on the LED. The GPIO is
allocate with the LED *off*, then *later* when the trigger runs it is
turned back on. If the LED was already on via the GPIO's reset default or
action of the firmware, this produces a glitch where the LED goes from on
to off to on. While normally this is fast enough that it wouldn't be
noticeable to a human observer, there are still serious problems.
One is that there may be something else on the GPIO line, like a hardware
alarm or watchdog, that is fast enough to notice the glitch.
Another is that the kernel may panic before the LED is turned back on, thus
hanging with the LED in the wrong state. This is not just speculation, but
actually happened to me with an embedded system that has an LED which
should turn off when the kernel finishes booting, which was left in the
incorrect state due to a bug in the OF LED binding code.
We also let GPIO LEDs get their initial value from whatever the current
state of the GPIO line is. On some systems the LEDs are put into some
state by the firmware or hardware before Linux boots, and it is desired to
have them keep this state which is otherwise unknown to Linux.
This requires that the underlying GPIO driver support reading the value of
output GPIOs. Some drivers support this and some do not.
The platform device binding gains a field in the platform data
"default_state" that controls this. There are three constants defined to
select from on, off, or keeping the current state. The OpenFirmware
binding uses a property named "default-state" that can be set to "on",
"off", or "keep". The default if the property isn't present is off.
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
LEDs driver for National Semiconductor LP3944 Funlight Chip
http://www.national.com/pf/LP/LP3944.html
This helper chip can drive up to 8 leds, with two programmable DIM
modes; it could even be used as a gpio expander but this driver assumes
it is used as a led controller.
The DIM modes are used to set _blink_ patterns for leds, the pattern is
specified supplying two parameters:
- period: from 0s to 1.6s
- duty cycle: percentage of the period the led is on, from 0 to 100
LP3944 can be found on Motorola A910 smartphone, where it drives the rgb
leds, the camera flash light and the displays backlights.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Indent using tabs, not spaces.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Acked-by: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
The documentation for the parameters of blink_set() was a bit hard
to find so put some where I'd expected to find it.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Add initialisation of GPIO ports for compatibility with boards with Award
BIOS (e.g. ALIX.3D3).
Signed-off-by: Tobias Mueller <Tobias_Mueller@twam.info>
Reviewed-by: Constantin Baranov <const@mimas.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
WARNING: drivers/leds/leds-gpio.o(.text+0x153): Section mismatch in reference from the function gpio_led_probe() to the function .devinit.text:create_gpio_led()
The function gpio_led_probe() references the function __devinit
create_gpio_led(). This is often because gpio_led_probe lacks a __devinit
annotation or the annotation of create_gpio_led is wrong.
Signed-off-by: Zhenwen Xu <helight.xu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Allow the user application to change the wave pattern and led current by
'wave_pattern' and 'rgb_current' sysfs files.
Signed-off-by: Kim Kyuwon <q1.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Change the license to 'GPL v2'
Signed-off-by: Kim Kyuwon <q1.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
LED_CORE_SUSPENDRESUME flag is not needed in the bd2802 driver, because
all works for suspend/resume is done in bd2802_suspend and bd2802_suspend
functions. And this patch allows bd2802 to be configured again when it
resumes from suspend.
Signed-off-by: Kim Kyuwon <q1.kim@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: Fix up HAVE_PERF_COUNTERS typo.
sh: Fix up more dma-mapping fallout.
sh: SH7786 SMP support.
sh: Wire up the uncached fixmap on sh64 as well.
sh: Use local TLB flush in set_pte_phys().
sh: Provide cpu_idle_wait() to fix up cpuidle/SMP build.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
RDMA: Add __init/__exit macros to addr.c and cma.c
IB/ehca: Bump version number
mlx4_core: Fix dma_sync_single_for_cpu() with matching for_device() calls
IB/mthca: Replace dma_sync_single() use with proper functions
RDMA/nes: Fix FIN state handling under error conditions
RDMA/nes: Fix max_qp_init_rd_atom returned from query device
IB/ehca: Ensure that guid_entry index is not negative
IB/ehca: Tolerate dynamic memory operations before driver load
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (38 commits)
fusion: mptsas, fix lock imbalance
[SCSI] scsi_transport_fc: replace BUS_ID_SIZE by fixed count
sd, sr: fix Driver 'sd' needs updating message
scsi_transport_iscsi: return -EOVERFLOW for Too many iscsi targets
fc_transport: Selective return value from BSG timeout function
fc_transport: The softirq_done function registration for BSG request
sym53c8xx: ratelimit parity errors
explain the hidden scsi_wait_scan Kconfig variable
ibmvfc: Fix endless PRLI loop in discovery
ibmvfc: Process async events before command responses
libfc: Add runtime debugging with debug_logging module parameter
libfcoe: Add runtime debugging with module param debug_logging
fcoe: Add runtime debug logging with module parameter debug_logging
scsi_debug: Add support for physical block exponent and alignment
cnic: add NETDEV_1000 and NETDEVICES to Kconfig select
cnic: Fix __symbol_get() build error.
Revert "[SCSI] cnic: fix error: implicit declaration of function ‘__symbol_get’"
ipr: differentiate pci-x and pci-e based adapters
ipr: add test for MSI interrupt support
scsi_transport_spi: Blacklist Ultrium-3 tape for IU transfers
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: add dummy pgprot_noncached()
lib/checksum.c: fix endianess bug
asm-generic: hook up new system calls
asm-generic: list Arnd as asm-generic maintainer
asm-generic: drop HARDIRQ_BITS definition from hardirq.h
asm-generic: uaccess: fix up local access_ok() usage
asm-generic: uaccess: add missing access_ok() check to strnlen_user()
Indeed FOLL_WRITE matches FAULT_FLAG_WRITE, matches GUP_FLAGS_WRITE,
and it's tempting to devise a set of Grand Unified Paging flags;
but not today. So until then, let's rely upon the compiler to spot
the coincidence, "rather than have that subtle dependency and a
comment for it" - as you remarked in another context yesterday.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
handle_mm_fault() is now passing fault flags rather than write_access
down to hugetlb_fault(), so better recognize that in hugetlb_fault(),
and in hugetlb_no_page().
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Make jack-plug notification selectable
ALSA: ctxfi - Add PM support
sound: seq_midi_event: fix decoding of (N)RPN events
ALSA: hda - Add digital-mic support to ALC262 auto model
ALSA: hda - Fix check of input source type for realtek codecs
ALSA: hda - Add quirk for Sony VAIO Z21MN
ALSA: hda - Get back Input Source for ALC262 toshiba-s06 model
ALSA: hda - Fix unsigned comparison in patch_sigmatel.c
ALSA: via82xx: add option to disable 500ms delay in snd_via82xx_codec_wait
sound: fix check for return value in snd_pcm_hw_refine
ALSA: ctxfi - Allow unknown PCI SSIDs
ASoC: Blackfin: update the bf5xx_i2s_resume parameters
ASoC: Blackfin: keep better track of SPORT configuration state
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (62 commits)
V4L/DVB (12131): BUGFIX: An incorrect Carrier Recovery Loop optimization table was being
V4L/DVB (12130): Fix a redundant compiler warning
V4L/DVB (12003): v4l2: Move bounding code outside I2C ifdef block
V4L/DVB (11913): cx231xx: TRY_FMT should not actually set anything
V4L/DVB (11912): em28xx: Use v4l bounding/alignment function
V4L/DVB (11911): cx231xx: Use v4l bounding/alignment function
V4L/DVB (11910): mt9: Use v4l bounding/alignment function
V4L/DVB (11909): cx23885: Use v4l bounding/alignment function
V4L/DVB (11908): w8968cf: Use v4l bounding/alignment function
V4L/DVB (11907): cx88: Use v4l bounding/alignment function
V4L/DVB (11906): saa7134: Use v4l bounding/alignment function
V4L/DVB (11905): vivi: Use v4l bounding/alignment function
V4L/DVB (11904): zoran: Use v4l bounding/alignment functiob
V4L/DVB (11903): sh_mobile_ceu_camera: Use v4l bounding/alignment function
V4L/DVB (11902): pxa-camera: Use v4l bounding/alignment function
V4L/DVB (11901): v4l2: Create helper function for bounding and aligning images
V4L/DVB (12128): v4l2: update framework documentation.
V4L/DVB (12125): v4l2: add new s_config subdev ops and v4l2_i2c_new_subdev_cfg/board calls
V4L/DVB (12122): pvrusb2: De-obfuscate code which handles routing schemes
V4L/DVB (12121): pvrusb2: Improve handling of routing schemes
...
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: don't set IORDY for reset
sata_fsl: Add power mgmt support
[libata] PATA driver for CF interface on AT91SAM9260 SoC
[libata] beautify module parameters
Add __init and __exit annotations to the module_init/module_exit
functions from drivers/infiniband/core/addr.c and cma.c.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Increment version number for DMEM toleration.
Signed-off-by: Alexander Schmidt <alexs@linux.vnet.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
The isolated page is "cursor_page" not "page".
This could cause LRU list corruption under memory pressure, caught by
CONFIG_DEBUG_LIST.
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Tested-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
That's HAVE_PERF_COUNTERS not HAVE_PERF_COUNTER. This was right
initially but I seem to have screwed it up while re-typing it out
by hand on another machine when I checked it in. Hmph.
Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Unitialized fence register could leads to corrupted display. Problem
encountered on MacBooks (revision 1 and 2), directly booting from EFI
or through BIOS emulation.
(bug #21710 at freedestop.org)
Signed-off-by: Grégoire Henry <henry@pps.jussieu.fr>
Signed-off-by: Eric Anholt <eric@anholt.net>
Selecting DEBUG_SLAB or SLUB_DEBUG by the KMEMLEAK menu entry may cause
issues with other dependencies (KMEMCHECK). These configuration options
aren't strictly needed by kmemleak but they may increase the chances of
finding leaks. This patch also updates the KMEMLEAK config entry help
text.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
For yet unknown reason 4-bit mode doesn't work on MPC8569E-MDS boards,
so make 1-bit mode default. When we resolve the issue, u-boot will
remove sdhci,1-bit-only property from the device tree, while SDHCI
will still work with older u-boots.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Split device tree binding out of booting-without-of.txt and put them
into their own files per binding.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
FSL RapidIO won't probe without a proper compatible entry. This
patch fixes the issue by adding fsl,rapidio-delta compatible to
mpc85xx_ids.
Signed-off-by: Randy Vinson <rvinson@mvista.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Match what other 85xx platforms do for of_platform_bus_probe and use
machine_device_initcall. This is one small step in killing of
ppc_md.init.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
The qe_issue_cmd() function (Freescale PowerPC QUICC Engine library) polls
on a register until a status bit changes, but does not include a timeout
to handle the situation if the bit never changes. Change the code to use
the new spin_event_timeout() macro, which simplifies polling on a register
without a timeout.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Most architectures now provide a pgprot_noncached(), the
remaining ones can simply use an dummy default implementation,
except for cris and xtensa, which should override the
default appropriately.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Magnus Damm <magnus.damm@gmail.com>
Change all the code that deals directly with ICMPv6 type and code
values to use u8 instead of a signed int as that's the actual data
type.
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fixes this compile error on s390:
CC drivers/net/ks8842.o
drivers/net/ks8842.c: In function 'ks8842_select_bank':
drivers/net/ks8842.c:124: error: implicit declaration of function 'iowrite16'
drivers/net/ks8842.c: In function 'ks8842_write8':
drivers/net/ks8842.c:131: error: implicit declaration of function 'iowrite8'
Cc: Richard Rojfors <richard.rojfors.ext@mocean-labs.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
