If a task is oom killed and still cannot find memory when trying with
no watermarks, it's better to fail the allocation attempt than to loop
endlessly.  Direct reclaim has already failed and the oom killer will
be a no-op since current has yet to die, so there is no other
alternative for allocations that are not __GFP_NOFAIL.
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Fix a post-2.6.24 performace regression caused by
3dfa5721 ("page-allocator: preserve PFN
ordering when __GFP_COLD is set").

Narayanan reports "The regression is around 15%.  There is no disk controller
as our setup is based on Samsung OneNAND used as a memory mapped device on a
OMAP2430 based board."

The page allocator tries to preserve contiguous PFN ordering when returning
pages such that repeated callers to the allocator have a strong chance of
getting physically contiguous pages, particularly when external fragmentation
is low.  However, of the bulk of the allocations have __GFP_COLD set as they
are due to aio_read() for example, then the PFNs are in reverse PFN order.
This can cause performance degration when used with IO controllers that could
have merged the requests.

This patch attempts to preserve the contiguous ordering of PFNs for users of
__GFP_COLD.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reported-by: Narayananu Gopalakrishnan <narayanan.g@samsung.com>
Tested-by: Narayanan Gopalakrishnan <narayanan.g@samsung.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

A 32-bit perl can't handle 64-bit addresses without using the BigInt
package.
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Objects passed to kmemleak_seq_next() have an incremented reference
count (hence not freed) but they may point via object_list.next to
other freed objects. To avoid this, the whole start/next/stop sequence
must be protected by rcu_read_lock().
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'drm-radeon-kms' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (35 commits)
  drm/radeon: set fb aperture sizes for framebuffer handoff.
  drm/ttm: fix highuser vs dma32 confusion.
  drm/radeon: Fix size used for benchmarking BO copies.
  drm/radeon: Add radeon.test parameter for running BO GPU copy tests.
  drm/radeon/kms: allow interruptible waits for objects.
  drm/ttm: powerpc: Fix Highmem cache flushing.
  x86: Export kmap_atomic_prot() needed for TTM.
  drm/ttm: Fix ttm in-kernel copying of pages with non-standard caching attributes.
  drm/ttm: Fix an oops and sync object leak.
  drm/radeon/kms: vram sizing on certain r100 chips needs workaround.
  drm/radeon: Pay more attention to object placement requested by userspace.
  drm/radeon: Fall back to evicting BOs with memcpy if necessary.
  drm/radeon: Don't unreserve twice on failure to validate.
  drm/radeon/kms: fix bandwidth computation on avivo hardware
  drm/radeon/kms: add initial colortiling support.
  drm/radeon/kms: fix hotspot handling on pre-avivo chips
  drm/radeon/kms: enable frac fb divs on rs600/rs690/rs740
  drm/radeon/kms: add PLL flag to prefer frequencies <= the target freq
  drm/radeon/kms: block RN50 from using 3D engine.
  drm/radeon/kms: fix VRAM sizing like DDX does it.
  ...

* 'zero-length' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/misc-2.6:
  Remove zero-length file drivers/char/vr41xx_giu.c

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: accept late unlocking of HPA
  libata: Updates and fixes for pata_at91 driver
  ata_piix: Add new short cable ID
  ata_piix: Add new laptop short cable IDs
  ahci: add device IDs for Ibex Peak ahci controllers
  libata: remove superfluous NULL pointer checks
  libata: add missing NULL pointer check to ata_eh_reset()
  pata_pcmcia: add CNF-CDROM-ID

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  driver core: documentation: make it clear that sysfs is optional
  driver core: sysdev: do not send KOBJ_ADD uevent if kobject_init_and_add fails
  Dynamic debug: fix typo: -/->
  driver core: firmware_class:fix memory leak of page pointers array
  sysfs: fix hardlink count on device_move

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  staging: udlfb: Add vmalloc.h include
  staging: remove aten2011 driver
  Staging: android: lowmemorykiller.c: fix it for "oom: move oom_adj value from task_struct to mm_struct"
  Staging: serqt_usb2: fix memory leak in error case
  Staging: serqt_usb2: add missing calls to tty_kref_put()

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (34 commits)
  USB: xhci: Stall handling bug fixes.
  USB: xhci: Support for 64-byte contexts
  USB: xhci: Always align output device contexts to 64 bytes.
  USB: xhci: Scratchpad buffer allocation
  USB: Fix parsing of SuperSpeed Endpoint Companion descriptor.
  USB: xhci: Fail gracefully if there's no SS ep companion descriptor.
  USB: xhci: Handle babble errors on transfers.
  USB: xhci: Setup HW retries correctly.
  USB: xhci: Check if the host controller died in IRQ handler.
  USB: xhci: Don't oops if the host doesn't halt.
  USB: xhci: Make debugging more verbose.
  USB: xhci: Correct Event Handler Busy flag usage.
  USB: xhci: Handle short control packets correctly.
  USB: xhci: Represent 64-bit addresses with one u64.
  USB: xhci: Use GFP_ATOMIC while holding spinlocks.
  USB: xhci: Deal with stalled endpoints.
  USB: xhci: Set TD size in transfer TRB.
  USB: xhci: fix less- and greater than confusion
  USB: usbtest: no need for USB_DEVICEFS
  USB: musb: fix CONFIGDATA register read issue
  ...

We really don't want to mark the pty as a low-latency device, because as
Alan points out, the ->write method can be called from an IRQ (ppp?),
and that means we can't use ->low_latency=1 as we take mutexes in the
low_latency case.

So rather than using low_latency to force the written data to be pushed
to the ldisc handling at 'write()' time, just make the reader side (or
the poll function) do the flush when it checks whether there is data to
be had.

This also fixes the problem with lost data in an emacs compile buffer
(bugzilla 13815), and we can thus revert the low_latency pty hack
(commit 3a542974: "pty: quickfix for the
pty ENXIO timing problems").
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[ Modified to do the tty_flush_to_ldisc() inside input_available_p() so
  that it triggers for both read and poll()  - Linus]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This will allow efi/vesa to handoff to radeon.
Signed-off-by: Dave Airlie <airlied@redhat.com>

DMA32 and highmem are sort of exclusive.

Noticed by AndrewR on #radeon.
Signed-off-by: Dave Airlie <airlied@redhat.com>

The incorrect size caused benchmark results to be inflated by a factor of 4.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

If enabled, during initialization BO GTT->VRAM and VRAM->GTT GPU copies are
tested across the whole GTT aperture.

This has helped uncover the benchmark copy size bug and verify the maximum
aperture size supported by the AGP bridge in my PowerBook.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Blocking here isn't something the X server mouse appreciates,
avoid the block and let userspace retry the waits.

libdrm_radeon userspace library is also expecting EBUSY not ERESTART
Signed-off-by: Dave Airlie <airlied@redhat.com>

Temporarily maps highmem pages while flushing to get a valid virtual
address to flush.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

This functionality is needed to kmap_atomic() highmem pages that may
potentially have or are about to set up other mappings with
non-standard caching attributes.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

For x86 this affected highmem pages only, since they were always kmapped
cache-coherent, and this is fixed using kmap_atomic_prot().

For other architectures that may not modify the linear kernel map we
resort to vmap() for now, since kmap_atomic_prot() generally uses the
linear kernel map for lowmem pages. This of course comes with a
performance impact and should be optimized when possible.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

The code was potentially dereferencig a NULL sync object pointer.
At the same time a sync object reference was potentially leaked.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

If an rn50/r100/m6/m7 GPU has < 64MB RAM, i.e. 8/16/32, the
aperture used to calculate the MC_FB_LOCATION needs to be worked
out from the CONFIG_APER_SIZE register, and not the actual vram size.

TTM VRAM size was also being initialised wrong, use actual vram size
to initialise it.
Signed-off-by: Dave Airlie <airlied@redhat.com>

Previously we were basically always setting the GTT and VRAM flags regardless of
what userspace requested.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Otherwise if there's no GTT space we would fail the eviction, leading to
cascaded failure.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

This is done later in radeon_object_list_unvalidate(). Doing it twice triggers
a BUG in TTM, rendering X on KMS unusable until reboot.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Fix bandwidth computation and crtc priority in memory controller
so that crtc memory request are fullfill in time to avoid display
artifact.
Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

This adds new set/get tiling interfaces where the pitch
and macro/micro tiling enables can be set. Along with
a flag to decide if this object should have a surface when mapped.

The only thing we need to allocate with a mapped surface should be
the frontbuffer. Note rotate scanout shouldn't require one, and
back/depth shouldn't either, though mesa needs some fixes.

It fixes the TTM interfaces along Thomas's suggestions, and I've tested
the surface stealing code with two X servers and not seen any lockdep issues.

I've stopped tiling the fbcon frontbuffer, as I don't see there being
any advantage other than testing, I've left the testing commands in there,
just flip the fb_tiled to true in radeon_fb.c

Open: Can we integrate endian swapping in with this?

Future features:
texture tiling - need to relocate texture registers TXOFFSET* with tiling info.

This also merges Michel's cleanup surfaces regs at init time patch
even though it makes sense on its own, this patch really relies on it.

Some PowerMac firmwares set up a tiling surface at the beginning of VRAM
which messes us up otherwise.
that patch is:
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

On certain configurations, HPA isn't or can't be unlocked during
probing but it somehow ends up unlocked afterwards.  In the following
thread, the problem can be reliably reproduced after resuming from
STR.  The BIOS turns on HPA during boot but forgets to do it during
resume.

  http://thread.gmane.org/gmane.linux.kernel/858310

This patch updates libata revalidation such that it considers native
n_sectors.  If the device size has increased to match native
n_sectors, it's assumed that HPA has been unlocked involuntarily and
the device is recognized as the same one.  This should be fairly safe
while nicely working around the problem.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Christof Warlich <christof@warlich.name>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

Please consider the following updates and fixes for pata_at91 driver.

* Removed extra headers
	Here we need only static memory controller properties, which are
	contained in generic header at91sam9_smc.h.
	No need to include any specific headers for at91sam9260 SoC.

* No harsh BUG_ON for get_clk in set_smc_timing function
        get_clk is now performed in driver probing function,
	        probing fails if master clock is not available

* Fixed uint/ulong mess in calc_mck_cycles function
Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

OriginalAuthor: Tony Espy <espy@canonical.com>
Signed-off-by: Steve Conklin <sconklin@canonical.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

OriginalAuthor: Michael Frey <michael.frey@canonical.com>
Signed-off-by: Steve Conklin <sconklin@canonical.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

Add device IDS for Ibex Peak SATA AHCI Controllers
Signed-off-by: Jaroslav Kysela <jkysela@redhat.com>
Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

host->ports[] always contain pointers to valid port structures since
a "dummy port" structure is used in case if there is no physical port.

This patch takes care of two entries from Dan's list:

drivers/ata/sata_sil.c +535 sil_interrupt(13) warning: variable derefenced before check 'ap'
drivers/ata/sata_mv.c +2517 mv_unexpected_intr(6) warning: variable derefenced before check 'ap'

and of another needless NULL pointer check in pata_octeon_cf.c.
Reported-by: Dan Carpenter <error27@gmail.com>
Cc: corbet@lwn.net
Cc: eteo@redhat.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/libata-eh.c +2403 ata_eh_reset(80) warning: variable derefenced before check 'slave'

Please note that this is _not_ a real bug at the moment since ata_eh_context
structure is embedded into ata_list structure and the code alwas checks for
'slave' before accessing 'sehc'.

Anyway lets add missing check and always have a valid 'sehc' pointer (which
makes code easier to understand and prevents introducing some possible bugs
in the future).
Reported-by: Dan Carpenter <error27@gmail.com>
Cc: corbet@lwn.net
Cc: eteo@redhat.com
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

Fixes this report:
http://article.gmane.org/gmane.linux.kernel.pcmcia.devel/2228/Reported-by: John McGrath <john@john-mcgrath.com>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

Correct the xHCI code to handle stalls on USB endpoints.  We need to move
the endpoint ring's dequeue pointer past the stalled transfer, or the HW
will try to restart the transfer the next time the doorbell is rung.

Don't attempt to clear a halt on an endpoint if we haven't seen a stalled
transfer for it.  The USB core will attempt to clear a halt on all
endpoints when it selects a new configuration.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  hwmon: (asus_atk0110) Fix upper limit readings
  hwmon: (smsc47m1) Differentiate between LPC47M233 and LPC47M292

Adds support for controllers that use 64-byte contexts.  The following context
data structures are affected by this: Device, Input, Input Control, Endpoint,
and Slot.  To accommodate the use of either 32 or 64-byte contexts, a Device or
Input context can only be accessed through functions which look-up and return
pointers to their contained contexts.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Make sure the xHCI output device context is 64-byte aligned.  Previous
code was using the same structure for both the output device context and
the input control context.  Since the structure had 32 bytes of flags
before the device context, the output device context wouldn't be 64-byte
aligned.  Define a new structure to use for the output device context and
clean up the debugging for these two structures.

The copy of the device context in the input control context does *not*
need to be 64-byte aligned.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Allocates and initializes the scratchpad buffer array (XHCI 4.20).  This is an
array of 64-bit DMA addresses to scratch pages that the controller may use
during operation.  The number of pages is specified in the "Max Scratchpad
Buffers" field of HCSPARAMS2.  The DMA address of this array is written into
slot 0 of the DCBAA.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>