linux.git/arch, branch v3.11-rc7

Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

2013-08-25T19:41:37+00:00

Pull ARM fixes from Russell King:
 "This round of fixes is smaller than previous: a couple more updates
  for the security fixes, and a one-liner kexec fix"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7816/1: CONFIG_KUSER_HELPERS: fix help text
  ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
  ARM: 7819/1: fiq: Cast the first argument of flush_icache_range()

ARC: [lib] strchr breakage in Big-endian configuration

2013-08-24T18:24:53+00:00

For a search buffer, 2 byte aligned, strchr() was returning pointer
outside of buffer (buf - 1)

------------->8----------------
    // Input buffer (default 4 byte aigned)
    char *buffer = "1AA_";

    // actual search start (to mimick 2 byte alignment)
    char *current_line = &(buffer[2]);

    // Character to search for
    char c = 'A';

    char *c_pos = strchr(current_line, c);

    printf("%s\n", c_pos) --> 'AA_' as oppose to 'A_'
------------->8----------------

Reported-by: Anton Kolesov 
Debugged-by: Anton Kolesov 
Cc:  # [3.9 and 3.10]
Cc: Noam Camus 
Signed-off-by: Joern Rennecke  
Signed-off-by: Vineet Gupta 
Signed-off-by: Linus Torvalds

Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2013-08-22T17:44:44+00:00

Pull ARM SoC fixes from Olof Johansson:
 "A handful of fixes for 3.11 are still trickling in.  These are:
   - A couple of fixes for older OMAP platforms
   - Another few fixes for at91 (lateish due to European summer
     vacations)
   - A late-found problem with USB on Tegra, fix is to keep VBUS
     regulator on at all times
   - One fix for Exynos 5440 dealing with CPU detection
   - One MAINTAINERS update"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: tegra: always enable USB VBUS regulators
  ARM: davinci: nand: specify ecc strength
  ARM: OMAP: rx51: change musb mode to OTG
  ARM: OMAP2: fix musb usage for n8x0
  MAINTAINERS: Update email address for Benoit Cousson
  ARM: at91/DT: fix at91sam9n12ek memory node
  ARM: at91: add missing uart clocks DT entries
  ARM: SAMSUNG: fix to support for missing cpu specific map_io
  ARM: at91/DT: at91sam9x5ek: fix USB host property to enable port C

x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member

2013-08-22T17:19:35+00:00

This is the updated version of df54d6fa5427 ("x86 get_unmapped_area():
use proper mmap base for bottom-up direction") that only randomizes the
mmap base address once.

Signed-off-by: Radu Caragea 
Reported-and-tested-by: Jeff Shorey 
Cc: Andrew Morton 
Cc: Michel Lespinasse 
Cc: Oleg Nesterov 
Cc: Rik van Riel 
Cc: Ingo Molnar 
Cc: Adrian Sendroiu 
Cc: Greg KH 
Cc: Kamal Mostafa 
Signed-off-by: Linus Torvalds

Revert "x86 get_unmapped_area(): use proper mmap base for bottom-up direction"

2013-08-22T17:18:44+00:00

This reverts commit df54d6fa54275ce59660453e29d1228c2b45a826.

The commit isn't necessarily wrong, but because it recalculates the
random mmap_base every time, it seems to confuse user memory allocators
that expect contiguous mmap allocations even when the mmap address isn't
specified.

In particular, the MATLAB Java runtime seems to be unhappy. See

  https://bugzilla.kernel.org/show_bug.cgi?id=60774

So we'll want to apply the random offset only once, and Radu has a patch
for that.  Revert this older commit in order to apply the other one.

Reported-by: Jeff Shorey 
Cc: Radu Caragea 
Cc: Andrew Morton 
Signed-off-by: Linus Torvalds

ARM: tegra: always enable USB VBUS regulators

2013-08-22T04:36:19+00:00

This fixes a regression exposed during the merge window by commit
9f310de "ARM: tegra: fix VBUS regulator GPIO polarity in DT"; namely that
USB VBUS doesn't get turned on, so USB devices are not detected. This
affects the internal USB port on TrimSlice (i.e. the USB->SATA bridge, to
which the SSD is connected) and the external port(s) on Seaboard/
Springbank and Whistler.

The Tegra DT as written in v3.11 allows two paths to enable USB VBUS:

1) Via the legacy DT binding for the USB controller; it can directly
   acquire a VBUS GPIO and activate it.

2) Via a regulator for VBUS, which is referenced by the new DT binding
   for the USB controller.

Those two methods both use the same GPIO, and hence whichever of the
USB controller and regulator gets probed first ends up owning the GPIO.
In practice, the USB driver only supports path (1) above, since the
patches to support the new USB binding are not present until v3.12:-(

In practice, the regulator ends up being probed first and owning the
GPIO. Since nothing enables the regulator (the USB driver code is not
yet present), the regulator ends up being turned off. This originally
caused no problem, because the polarity in the regulator definition was
incorrect, so attempting to turn off the regulator actually turned it
on, and everything worked:-(

However, when testing the new USB driver code in v3.12, I noticed the
incorrect polarity and fixed it in commit 9f310de "ARM: tegra: fix VBUS
regulator GPIO polarity in DT". In the context of v3.11, this patch then
caused the USB VBUS to actually turn off, which broke USB ports with VBUS
control. I got this patch included in v3.11-rc1 since it fixed a bug in
device tree (incorrect polarity specification), and hence was suitable to
be included early in the rc series. I evidently did not test the patch at
all, or correctly, in the context of v3.11, and hence did not notice the
issue that I have explained above:-(

Fix this by making the USB VBUS regulators always enabled. This way, if
the regulator owns the GPIO, it will always be turned on, even if there
is no USB driver code to request the regulator be turned on. Even
ignoring this bug, this is a reasonable way to configure the HW anyway.

If this patch is applied to v3.11, it will cause a couple pretty trivial
conflicts in tegra20-{trimslice,seaboard}.dts when creating v3.12, since
the context right above the added lines changed in patches destined for
v3.12.

Reported-by: Kyle McMartin 
Signed-off-by: Stephen Warren 
Signed-off-by: Olof Johansson

Merge tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2013-08-21T23:38:33+00:00

Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
 - On ARM did not have balanced calls to get/put_cpu.
 - Fix to make tboot + Xen + Linux correctly.
 - Fix events VCPU binding issues.
 - Fix a vCPU online race where IPIs are sent to not-yet-online vCPU.

* tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/smp: initialize IPI vectors before marking CPU online
  xen/events: mask events when changing their VCPU binding
  xen/events: initialize local per-cpu mask for all possible events
  x86/xen: do not identity map UNUSABLE regions in the machine E820
  xen/arm: missing put_cpu in xen_percpu_init

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2013-08-21T23:37:14+00:00

Pull MIPS fix from Ralf Baechle:
 "Just a single patch which fixes a special case in the MIPS FPU
  emulator which is always required, even on CPUs with FPU.  There is
  the rare special case that an FPU (or certain other instructions) in a
  branch delay slot is causing an exception and then the branch
  instruction will need to be emulated by the kernel before resuming
  execution.  This is working great except if the branch instruction is
  an Octeon BBIT instruction.

  The boring disclaimer - all MIPS defconfigs build tested and no
  regressions and runtime tested on Octeon, no known issues"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Handle OCTEON BBIT instructions in FPU emulator.

Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

2013-08-21T23:36:32+00:00

Pull arm64 perf fixes from Catalin Marinas:
 "Perf backend fixes for arm64 where the user can cause kernel panic
  (discovered with Vince's fuzzing tool)"

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: perf: fix event validation for software group leaders
  arm64: perf: fix array out of bounds access in armpmu_map_hw_event()

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2013-08-21T23:35:37+00:00

Pull kvm fixes from Paolo Bonzini:
 "Fixes for ARM and aarch64.

  This pull request is coming a bit later than I would have preferred,
  because I and Gleb happened to have holidays around the same weeks of
  August...  sorry about that"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: ARM: Squash len warning
  arm64: KVM: use 'int' instead of 'u32' for variable 'target' in kvm_host.h.
  arm64: KVM: add missing dsb before invalidating Stage-2 TLBs
  arm64: KVM: perform save/restore of PAR_EL1
  arm64: KVM: fix 2-level page tables unmapping
  ARM: KVM: Fix unaligned unmap_range leak
  ARM: KVM: Fix 64-bit coprocessor handling