Commit Graph

77759 Commits

Author SHA1 Message Date
Paul Mackerras
0acb91112a powerpc/kvm/book3s_hv: Preserve guest CFAR register value
The CFAR (Come-From Address Register) is a useful debugging aid that
exists on POWER7 processors.  Currently HV KVM doesn't save or restore
the CFAR register for guest vcpus, making the CFAR of limited use in
guests.

This adds the necessary code to capture the CFAR value saved in the
early exception entry code (it has to be saved before any branch is
executed), save it in the vcpu.arch struct, and restore it on entry
to the guest.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-15 16:54:33 +11:00
Paul Mackerras
1707dd1613 powerpc: Save CFAR before branching in interrupt entry paths
Some of the interrupt vectors on 64-bit POWER server processors are
only 32 bytes long, which is not enough for the full first-level
interrupt handler.  For these we currently just have a branch to an
out-of-line handler.  However, this means that we corrupt the CFAR
(come-from address register) on POWER7 and later processors.

To fix this, we split the EXCEPTION_PROLOG_1 macro into two pieces:
EXCEPTION_PROLOG_0 contains the part up to the point where the CFAR
is saved in the PACA, and EXCEPTION_PROLOG_1 contains the rest.  We
then put EXCEPTION_PROLOG_0 in the short interrupt vectors before
we branch to the out-of-line handler, which contains the rest of the
first-level interrupt handler.  To facilitate this, we define new
_OOL (out of line) variants of STD_EXCEPTION_PSERIES, etc.

In order to get EXCEPTION_PROLOG_0 to be short enough, i.e., no more
than 6 instructions, it was necessary to move the stores that move
the PPR and CFAR values into the PACA into __EXCEPTION_PROLOG_1 and
to get rid of one of the two HMT_MEDIUM instructions.  Previously
there was a HMT_MEDIUM_PPR_DISCARD before the prolog, which was
nop'd out on processors with the PPR (POWER7 and later), and then
another HMT_MEDIUM inside the HMT_MEDIUM_PPR_SAVE macro call inside
__EXCEPTION_PROLOG_1, which was nop'd out on processors without PPR.
Now the HMT_MEDIUM inside EXCEPTION_PROLOG_0 is there unconditionally
and the HMT_MEDIUM_PPR_DISCARD is not strictly necessary, although
this leaves it in for the interrupt vectors where there is room for
it.

Previously we had a handler for hypervisor maintenance interrupts at
0xe50, which doesn't leave enough room for the vector for hypervisor
emulation assist interrupts at 0xe40, since we need 8 instructions.
The 0xe50 vector was only used on POWER6, as the HMI vector was moved
to 0xe60 on POWER7.  Since we don't support running in hypervisor mode
on POWER6, we just remove the handler at 0xe50.

This also changes denorm_exception_hv to use EXCEPTION_PROLOG_0
instead of open-coding it, and removes the HMT_MEDIUM_PPR_DISCARD
from the relocation-on vectors (since any CPU that supports
relocation-on interrupts also has the PPR).

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-15 16:54:30 +11:00
Paul Mackerras
6100209bf6 powerpc: Remove Cell-specific relocation-on interrupt vector code
The Cell processor doesn't support relocation-on interrupts, so we
don't need relocation-on versions of the interrupt vectors that are
purely Cell-specific.  This removes them.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-15 16:54:22 +11:00
Ian Munsie
2468dcf641 powerpc: Add support for context switching the TAR register
This patch adds support for enabling and context switching the Target
Address Register in Power8. The TAR is a new special purpose register
that can be used for computed branches with the bctar[l] (branch
conditional to TAR) instruction in the same manner as the count and link
registers.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Matt Evans <matt@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-08 14:05:50 +11:00
Nishanth Aravamudan
14b6f00f8a pseries/iommu: Remove DDW on kexec
pseries/iommu: remove DDW on kexec

We currently insert a property in the device-tree when we successfully
configure DDW for a given slot. This was meant to be an optimization to
speed up kexec/kdump, so that we don't need to make the RTAS calls again
to re-configured DDW in the new kernel.

However, we end up tripping a plpar_tce_stuff failure on kexec/kdump
because we unconditionally parse the ibm,dma-window property for the
node at bus/dev setup time. This property contains the 32-bit DMA window
LIOBN, which is distinct from the DDW window's. We pass that LIOBN (via
iommu_table_init -> iommu_table_clear -> tce_free ->
tce_freemulti_pSeriesLP) to plpar_tce_stuff, which fails because that
32-bit window is no longer present after
25ebc45b93 ("powerpc/pseries/iommu: remove
default window before attempting DDW manipulation").

I believe the simplest, easiest-to-maintain fix is to just change our
initcall to, rather than detecting and updating the new kernel's DDW
knowledge, just remove all DDW configurations. When the drivers
re-initialize, we will set everything back up as it was before.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-08 14:05:49 +11:00
Nishanth Aravamudan
a1dabadebb pseries/iommu: Restore_default_window does not use liobn parameter
The parameter is unused, and complicates a following fix. Just remove
it.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-08 14:05:48 +11:00
Daniel Borkmann
174ea471c3 powerpc: fix ics_rtas_init and start_secondary section mismatch
It seems, we're fine with just annotating the two functions.
Thus, this fixes the following build warnings on ppc64:

WARNING: arch/powerpc/sysdev/xics/built-in.o(.text+0x1664):
The function .ics_rtas_init() references
the function __init .xics_register_ics().
This is often because .ics_rtas_init lacks a __init
annotation or the annotation of .xics_register_ics is wrong.

WARNING: arch/powerpc/sysdev/built-in.o(.text+0x6044):
The function .ics_rtas_init() references
the function __init .xics_register_ics().
This is often because .ics_rtas_init lacks a __init
annotation or the annotation of .xics_register_ics is wrong.

WARNING: arch/powerpc/kernel/built-in.o(.text+0x2db30):
The function .start_secondary() references
the function __cpuinit .vdso_getcpu_init().
This is often because .start_secondary lacks a __cpuinit
annotation or the annotation of .vdso_getcpu_init is wrong.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-02-08 14:05:48 +11:00
Nishanth Aravamudan
71cf1def1a pseries/iommu: Ensure TCEs are cleared with non-huge DDW
There are now two kinds of DMA windows that might be presented by
PowerVM DDW support -- huge windows (that can map all of system memory
regardless of the LPAR configuration) and non-huge windows (which
can't). They are implemented slightly differently in PowerVM, and thus
have different characteristics. The most obvious is that slot isolate
doesn't clear the TCEs/window for us with non-huge windows. Thus, when a
DLPAR operation occurs on a slot using a non-huge window, TCEs are still
present (the notifier chain doesn't currently remove them explicitly)
and the DLPAR fails. Fix this by calling remove_ddw() first, which will
unmap the DDW TCEs.

Note: a corresponding change to drmgr is needed to actually successfully
DLPAR, such that the device-tree update (which causes the notifier chain
to fire) occurs before slot isolate.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:09 +11:00
Nishanth Aravamudan
22b382985a pseries/iommu: Fix iteration in DDW TCE clearrange
tce_clearrange_multi_pSeriesLP is attempting to iterate over all TCEs in
a given range. However, is it not advancing the dma_offset value passed
to plpar_tce_stuff via the next value. This prevents DLPAR from
completing, because TCEs are still present at slot isolation time.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:08 +11:00
Michael Neuling
4ae7ebe952 powerpc: Change hardware breakpoint to allow longer ranges
Change the hardware breakpoint code so that we can support wider ranged
breakpoints.

This means both ptrace and perf hardware breakpoints can use upto 512 byte long
breakpoints when using the DAWR and only 8 byte when using the DABR.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:08 +11:00
Michael Neuling
05d694ea0d powerpc: Add length setting to set_dawr
Currently we set the length field in the DAWR to 0 which defaults it to one
double word (64bits) which is the same as the DABR.

Change this so that we can set it to longer values as supported by the DAWR.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:07 +11:00
sukadev@linux.vnet.ibm.com
f53d168c02 perf/Power: PERF_EVENT_IOC_ENABLE does not reenable event
perf/Power: PERF_EVENT_IOC_ENABLE does not reenable event

If we disable a perf event because we exceeded the specified ->event_limit,
power_pmu_stop() sets the PERF_HES_STOPPED flag on the event.

If the application then re-enables the event using PERF_EVENT_IOC_ENABLE
ioctl, we don't ever clear this STOPPED flag. Consequently, the user space
is never notified of the event.

Following message has more background and test case.

    http://lists.eecs.utk.edu/pipermail/ptools-perfapi/2012-October/002528.html

Used the following test cases to verify that this patch works on latest PAPI.

	$ papi.git/src/ctests/nonthread PAPI_TOT_CYC@5000000

	$ papi.git/src/ctests/overflow_single_event

Changelog[v2]:
	- [Paul Mackerras] Also clear PERF_HES_UPTODATE flag since we are
	  restarting the event; cleanup comments and patch description.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:07 +11:00
Li Zhong
94c95cfbfe powerpc: Avoid debug_smp_processor_id() check in SHARED_PROCESSOR
Use local_paca directly in macro SHARED_PROCESSOR, as all processors
have the same value for the field shared_proc, so we don't need care
racy here.

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:06 +11:00
Suzuki K. Poulose
5e249d4528 uprobes/powerpc: Add dependency on single step emulation
Uprobes uses emulate_step in sstep.c, but we haven't explicitly specified
the dependency. On pseries HAVE_HW_BREAKPOINT protects us, but 44x has no
such luxury.

Consolidate other users that depend on sstep and create a new config option.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com>
Cc: linuxppc-dev@ozlabs.org
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:06 +11:00
Benjamin Collins
5611fe48c5 powerpc: Add support for CTS-1000 GPIO controlled system poweroff
CTS-1000 is based on P4080. GPIO 27 is used to signal the FPGA to
switch off power, and also associates IRQ 8 with front-panel button
press (which we use to call orderly_poweroff()).

The relevant device-tree looks like this:

	gpio0: gpio@130000 {
		compatible = "fsl,qoriq-gpio";
		reg = <0x130000 0x1000>;
		interrupts = <55 2 0 0>;
		#gpio-cells = <2>;
		gpio-controller;

		/* Allows powering off the system via GPIO signal. */
		gpio-halt@27 {
			compatible = "sgy,gpio-halt";
			gpios = <&gpio0 27 0>;
			interrupts = <8 1 0 0>;
		};
	};

Because the driver cannot match on sgy,gpio-halt (because the node is never
processed through of_platform), it matches on fsl,qoriq-gpio and then
checks child nodes for the matching sgy,gpio-halt. This also ensures that
the GPIO controller is detected prior to sgy_cts1000's probe callback,
since that node wont match via of_platform until the controller is
registered.

Also, because the GPIO handler for triggering system poweroff might sleep,
the IRQ uses a workqueue to call orderly_poweroff().

As a final note, this driver may be expanded for other features specific to
the CTS-1000.

Signed-off-by: Ben Collins <ben.c@servergy.com>
Cc: Jack Smith <jack.s@servergy.com>
Cc: Vihar Rai <vihar.r@servergy.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:05 +11:00
Scott Wood
34f364fef4 powerpc/fsl: Remove CONFIG_IRQ_ALL_CPUS from mpc85xx/mpc86xx defconfig
While this should be harmless now that distribute_irqs
obeys MPIC_SINGLE_DEST_CPU, there's no reason to enable this
on mpc85xx/mpc86xx since MPIC_SINGLE_DEST_CPU will always be set.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:05 +11:00
Scott Wood
7bd9fc556d powerpc/mpic: Make distribute_irqs obey MPIC_SINGLE_DEST_CPU
Previously we were setting an illegal configuration on mpc85xx
MPICs if CONFIG_IRQ_ALL_CPUS is enabled (which for some reason it is
in mpc85xx_smp_defconfig).

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:35:04 +11:00
Michael Neuling
145c52d5ce powerpc/ptrace: Make #defines for all request numbers hex
We have a mix of decimal and hex here, so lets make them consistently
hex.  Also, strace will print them in hex if it can't decode them, so
having them in hex here makes it easier to match up.

No functional change.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:34:25 +11:00
Cody P Schafer
4e8309baed powerpc/mm: Eliminate unneeded for_each_memblock
The only persistent change made by this loop is calling
memblock_set_node() once for each memblock, which is not useful (and has
no effect) as memblock_set_node() is not called with any
memblock-specific parameters.

Subsistute a single memblock_set_node().

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 11:34:25 +11:00
Benjamin Herrenschmidt
dfd0436ad0 Merge branch 'merge' into next
Merge "merge" branch to bring in various bug fixes that are
going into 3.8
2013-01-29 11:33:37 +11:00
Tiejun Chen
689dfa894c powerpc: Max next_tb to prevent from replaying timer interrupt
With lazy interrupt, we always call __check_irq_replaysome with
decrementers_next_tb to check if we need to replay timer interrupt.
So in hotplug case we also need to set decrementers_next_tb as MAX
to make sure __check_irq_replay don't replay timer interrupt
when return as we expect, otherwise we'll trap here infinitely.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:18:16 +11:00
Cong Ding
fefd9e6f88 powerpc: kernel/kgdb.c: Fix memory leakage
the variable backup_current_thread_info isn't freed before existing the
function.

Signed-off-by: Cong Ding <dinggnu@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:18:15 +11:00
Tiejun Chen
572177d7c7 powerpc/book3e: Disable interrupt after preempt_schedule_irq
In preempt case current arch_local_irq_restore() from
preempt_schedule_irq() may enable hard interrupt but we really
should disable interrupts when we return from the interrupt,
and so that we don't get interrupted after loading SRR0/1.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:18:15 +11:00
Carl E. Love
46ed7a76ae powerpc/oprofile: Fix error in oprofile power7_marked_instr_event() function
The calculation for the left shift of the mask OPROFILE_PM_PMCSEL_MSK has an
error.  The calculation is should be to shift left by (max_cntrs - cntr) times
the width of the pmsel field width.  However, the #define OPROFILE_MAX_PMC_NUM
was used instead of OPROFILE_PMSEL_FIELD_WIDTH.  This patch fixes the
calculation.

Signed-off-by: Carl Love <cel@us.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:18:14 +11:00
Steven Rostedt
72640d8803 powerpc/pasemi: Fix crash on reboot
commit f96972f2dc "kernel/sys.c: call disable_nonboot_cpus() in
kernel_restart()"

added a call to disable_nonboot_cpus() on kernel_restart(), which tries
to shutdown all the CPUs except the first one. The issue with the PA
Semi, is that it does not support CPU hotplug.

When the call is made to __cpu_down(), it calls the notifiers
CPU_DOWN_PREPARE, and then tries to take the CPU down.

One of the notifiers to the CPU hotplug code, is the cpufreq. The
DOWN_PREPARE will call __cpufreq_remove_dev() which calls
cpufreq_driver->exit. The PA Semi exit handler unmaps regions of I/O
that is used by an interrupt that goes off constantly
(system_reset_common, but it goes off during normal system operations
too). I'm not sure exactly what this interrupt does.

Running a simple function trace, you can see it goes off quite a bit:

# tracer: function
#
#           TASK-PID    CPU#    TIMESTAMP  FUNCTION
#              | |       |          |         |
          <idle>-0     [001]  1558.859363: .pasemi_system_reset_exception <-.system_reset_exception
          <idle>-0     [000]  1558.860112: .pasemi_system_reset_exception <-.system_reset_exception
          <idle>-0     [000]  1558.861109: .pasemi_system_reset_exception <-.system_reset_exception
          <idle>-0     [001]  1558.861361: .pasemi_system_reset_exception <-.system_reset_exception
          <idle>-0     [000]  1558.861437: .pasemi_system_reset_exception <-.system_reset_exception

When the region is unmapped, the system crashes with:

Disabling non-boot CPUs ...
Error taking CPU1 down: -38
Unable to handle kernel paging request for data at address 0xd0000800903a0100
Faulting instruction address: 0xc000000000055fcc
Oops: Kernel access of bad area, sig: 11 [#1]
PREEMPT SMP NR_CPUS=64 NUMA PA Semi PWRficient
Modules linked in: shpchp
NIP: c000000000055fcc LR: c000000000055fb4 CTR: c0000000000df1fc
REGS: c0000000012175d0 TRAP: 0300   Not tainted  (3.8.0-rc4-test-dirty)
MSR: 9000000000009032 <SF,HV,EE,ME,IR,DR,RI>  CR: 24000088  XER: 00000000
SOFTE: 0
DAR: d0000800903a0100, DSISR: 42000000
TASK = c0000000010e9008[0] 'swapper/0' THREAD: c000000001214000 CPU: 0
GPR00: d0000800903a0000 c000000001217850 c0000000012167e0 0000000000000000
GPR04: 0000000000000000 0000000000000724 0000000000000724 0000000000000000
GPR08: 0000000000000000 0000000000000000 0000000000000001 0000000000a70000
GPR12: 0000000024000080 c00000000fff0000 ffffffffffffffff 000000003ffffae0
GPR16: ffffffffffffffff 0000000000a21198 0000000000000060 0000000000000000
GPR20: 00000000008fdd35 0000000000a21258 000000003ffffaf0 0000000000000417
GPR24: 0000000000a226d0 c000000000000000 0000000000000000 0000000000000000
GPR28: c00000000138b358 0000000000000000 c000000001144818 d0000800903a0100
NIP [c000000000055fcc] .set_astate+0x5c/0xa4
LR [c000000000055fb4] .set_astate+0x44/0xa4
Call Trace:
[c000000001217850] [c000000000055fb4] .set_astate+0x44/0xa4 (unreliable)
[c0000000012178f0] [c00000000005647c] .restore_astate+0x2c/0x34
[c000000001217980] [c000000000054668] .pasemi_system_reset_exception+0x6c/0x88
[c000000001217a00] [c000000000019ef0] .system_reset_exception+0x48/0x84
[c000000001217a80] [c000000000001e40] system_reset_common+0x140/0x180

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:18:14 +11:00
Li Zhong
41d82bdb40 powerpc: Fix MAX_STACK_TRACE_ENTRIES too low warning for ppc32
This patch fixes MAX_STACK_TRACE_ENTRIES too low warning for ppc32,
which is similar to commit 12660b17.

Reported-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Tested-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-01-29 10:10:22 +11:00
Linus Torvalds
d93816a63c Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixlet from Marcelo Tosatti.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PPC: Emulate dcbf
2013-01-24 19:14:22 -08:00
Linus Torvalds
01acd3efd7 Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM fixes from Russell King:
 "A number of fixes:

  Patrik found a problem with preempt counting in the VFP assembly
  functions which can cause the preempt count to be upset.

  Nicolas fixed a problem with the parsing of the DT when it straddles a
  1MB boundary.

  Subhash Jadavani reported a problem with sparsemem and our highmem
  support for cache maintanence for DMA areas, and TI found a bug in
  their strongly ordered memory mapping type.

  Also, three fixes by way of Will Deacon's tree from Dave Martin for
  instruction compatibility and Marc Zyngier to fix hypervisor boot mode
  issues."

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7629/1: mm: Fix missing XN flag for for MT_MEMORY_SO
  ARM: DMA: Fix struct page iterator in dma_cache_maint() to work with sparsemem
  ARM: 7628/1: head.S: map one extra section for the ATAG/DTB area
  ARM: 7627/1: Predicate preempt logic on PREEMP_COUNT not PREEMPT alone
  ARM: virt: simplify __hyp_stub_install epilog
  ARM: virt: boot secondary CPUs through the right entry point
  ARM: virt: Avoid bx instruction for compatibility with <=ARMv4
2013-01-24 12:44:57 -08:00
Linus Torvalds
1496ec13a1 ARM: arm-soc: Fixes for 3.8-rc, take 2
Here's a long-pending fixes pull request for arm-soc (I didn't send one
 in the -rc4 cycle).
 
 The larger deltas are from:
 - A fixup of error paths in the mvsdio driver
 - Header file move for a driver that hadn't been properly converted to
   multiplatform on i.MX, which was causing build failures when included
 - Device tree updates for at91 dealing mostly with their new
   pinctrl setup merged in 3.8 and mistakes in those initial configs
 
 The rest are the normal mix of small fixes all over the place; sunxi,
 omap, imx, mvebu, etc, etc.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJRAV2RAAoJEIwa5zzehBx32N0P/AsFOLaVWjuvf3kBZTaZgp3J
 jZjhmAfJ2dQCITA792U2bI0d+gPiXm49EY3KWaNdb7S2UmQ1MwXHhKOwOQSVXli0
 j+qAgVUa4nSsi3FQesKS0zThG/Xr+RsyiJZ2dHu71hendJu5NB1O1hzO4hDEHkMc
 K8NGglKjtGirEiLIoub9ag8E9k5sd8X4nulrEJclon1BoolPcef18Bs96tdPmq/o
 Ss634vBqhzSE8OInFc6RDNzTSM52zXbornr/5xGAvFqQv6L0rSXHPvjeeWVdNjj1
 aNqkOrQOAHWRwTcyHOR0GdJfuAPSUwF+JkBWcUbgmsda7XunFiSb5tKV3FSVbJfN
 pMFvbg/iK+ByhWq8iAOkT7OP64wi++FlOFa39IAiQ1QPRD0j93OlKMp0LjqEEiKd
 Gw8o3X03GWhqoJUlSz40TF0Pvkje1UTk2Y8k2y24I3AnnEAcO5x+5pZYUTOe6x5N
 THqqSMsdKWIibrQJRuOXll/DkS8zcepTHU7o8hyHBKYh7LxdAs4ITQoYZjcU5lse
 HGwldByKfuNlzF3+96Jh9wZsr/9zjD8yovEcQYk37s56T/b7kT0sQm6XGS1dFE8Q
 xQgcXLEUXZLt/79B0bn/5ogh26xswx/3GHgNjL1tJQc/MhbQ6C0bb2bBVoU21qzq
 I5yMMwNSkH8+7+PGPiaQ
 =YDHs
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "Here's a long-pending fixes pull request for arm-soc (I didn't send
  one in the -rc4 cycle).

  The larger deltas are from:

   - A fixup of error paths in the mvsdio driver

   - Header file move for a driver that hadn't been properly converted
     to multiplatform on i.MX, which was causing build failures when
     included

   - Device tree updates for at91 dealing mostly with their new pinctrl
     setup merged in 3.8 and mistakes in those initial configs

  The rest are the normal mix of small fixes all over the place; sunxi,
  omap, imx, mvebu, etc, etc."

* tag 'fixes-for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (40 commits)
  mfd: vexpress-sysreg: Don't skip initialization on probe
  ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree
  ARM: vexpress: extend the MPIDR range used for pen release check
  ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii
  ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig
  ARM: at91/at91_dt_defconfig: remove memory specification to cmdline
  ARM: at91/dts: add macb mii pinctrl config for kizbox
  ARM: at91: rm9200: remake the BGA as default version
  ARM: at91: fix gpios on i2c-gpio for RM9200 DT
  ARM: at91/at91sam9x5 DTS: add SCK USART pins
  ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts
  ARM: at91/at91-pinctrl documentation: fix typo and add some details
  ARM: kirkwood: fix missing #interrupt-cells property
  mmc: mvsdio: use devm_ API to simplify/correct error paths.
  clk: mvebu/clk-cpu.c: fix memory leakage
  ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport
  ARM: OMAP2+: DT node Timer iteration fix
  ARM: OMAP2+: Fix section warning for omap_init_ocp2scp()
  ARM: OMAP2+: fix build break for omapdrm
  ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function calls
  ...
2013-01-24 12:42:50 -08:00
Olof Johansson
3836414f45 Merge branch 'vexpress/fixes' of git://git.linaro.org/people/pawelmoll/linux into fixes
From Pawel Moll:
- makes the V2P-CA15_A7 (a.k.a. TC2) work with 3.8 kernels
- improves vexpress-sysreg.c behaviour on arm64 platforms

* 'vexpress/fixes' of git://git.linaro.org/people/pawelmoll/linux:
  mfd: vexpress-sysreg: Don't skip initialization on probe
  ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree
  ARM: vexpress: extend the MPIDR range used for pen release check
2013-01-24 08:12:24 -08:00
Olof Johansson
60fd8e35e3 Here are fixes for AT91 that are mainly related to device tree.
One RM9200 setup option is the only C code change.
 Some documentation changes can clarify the pinctrl use.
 Then, some defconfig modifications are allowing the affected platforms
 to boot.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQEcBAABAgAGBQJRAPnqAAoJEAf03oE53VmQbeUH/04lzIgUv63RX2zQFD6Fi1zD
 IeYBhfzeSP65CPMqyFnw+lrHUdCWn0JYdFM6/x7J8n1k2+SY3T7N95k5oXlnqO6e
 pT/XGontWQIZkyL0jkrawbs5QtE0OYnkm8Ge97qlhul4XoIiyWLFFGDHE36dzcv/
 K4FPrG9PVVhjFIiZB+v5I3CnhzLWJvozn9J2ceIZ5d0Z9dwLuHWgXGu6OM2ZRvOw
 LR1r2YpnGTKUT0am6tmWm1W7PY6ZQOQXmx5qX/H2X6gRQdq690baYUTOYPK3ZckX
 kdEa+pCOQHY1GgimFzUzAVfoCyYwllo1yAWaK2a4qR4kxcaeGd1BYqlKeCFIfRc=
 =aKwA
 -----END PGP SIGNATURE-----

Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes

From Nicolas Ferre:
Here are fixes for AT91 that are mainly related to device tree.
One RM9200 setup option is the only C code change.
Some documentation changes can clarify the pinctrl use.
Then, some defconfig modifications are allowing the affected platforms
to boot.

* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
  ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii
  ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig
  ARM: at91/at91_dt_defconfig: remove memory specification to cmdline
  ARM: at91/dts: add macb mii pinctrl config for kizbox
  ARM: at91: rm9200: remake the BGA as default version
  ARM: at91: fix gpios on i2c-gpio for RM9200 DT
  ARM: at91/at91sam9x5 DTS: add SCK USART pins
  ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts
  ARM: at91/at91-pinctrl documentation: fix typo and add some details
2013-01-24 07:49:49 -08:00
Pawel Moll
ab838bc9c2 ARM: vexpress: Enable A7 cores in V2P-CA15_A7's Device Tree
As the kernel is able to cope with multiple clusters,
uncomment the A7 cores in the Device Tree for V2P-CA15_A7
tile, making all 5 cores available to the user.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2013-01-24 12:19:23 +00:00
Lorenzo Pieralisi
1585defb4c ARM: vexpress: extend the MPIDR range used for pen release check
In ARM multi-cluster systems the MPIDR affinity level 0 cannot be used as a
single cpu identifier, affinity levels 1 and 2 must be taken into account as
well.
This patch extends the MPIDR usage to affinity levels 1 and 2 in versatile
secondary cores start up code in order to compare the passed pen_release
value with the full-blown affinity mask.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
2013-01-24 12:19:23 +00:00
Olof Johansson
f6be19c8bc mvebu fixes for v3.8-rc5
- fix memory leak in mvebu/clk-cpu.c
  - use devm_ to correct/simplify error paths in mvsdio
  - add missing #interrupt-cells property in kirkwood
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iQEcBAABAgAGBQJQ/zvKAAoJEAi3KVZQDZAebCIIAKCaI3zYiHku7Q52Auzog0oU
 7Gk6/TpZtolZURusjSVo8ZPWoZhJc9SoFAVkVJPcB9j1xTl3K7iNVOj4DVvi66o2
 R8dw85nTKryBc6kapiJEpQhJof9dQKzmNSL36TNLaHjPef/hz3gVn/QqOxmyuBro
 ZZI0aUm+idgaDFkQCuevcfuStQGaKdOsIr23QEbicTj0rbgy0OIKrQ2KxFGKnr0Z
 YYYjUr9M5wk1mSOsssEcE/a97eejHS201JhYvCfxSpWCjbwiaErg0fzns7wZ2hhV
 BKGAEs+M67gcaHR/Pi2fy3LNLtwIcVNNgFYF3aCiBEFQ+hqtar6O9zqSmlBk1bI=
 =xOtK
 -----END PGP SIGNATURE-----

Merge tag 'mvebu_fixes_for_v3.8-rc5' of git://git.infradead.org/users/jcooper/linux into fixes

From Jason Cooper:

mvebu fixes for v3.8-rc5
 - fix memory leak in mvebu/clk-cpu.c
 - use devm_ to correct/simplify error paths in mvsdio
 - add missing #interrupt-cells property in kirkwood

* tag 'mvebu_fixes_for_v3.8-rc5' of git://git.infradead.org/users/jcooper/linux:
  ARM: kirkwood: fix missing #interrupt-cells property
  mmc: mvsdio: use devm_ API to simplify/correct error paths.
  clk: mvebu/clk-cpu.c: fix memory leakage
2013-01-23 20:30:52 -08:00
Linus Torvalds
ff7532ca2c more USB fixes for 3.8-rc4
Here are some more USB fixes for the 3.8-rc4 tree.
 
 Some gadget driver fixes, and finally resolved the ehci-mxc driver build issues
 (it's just some code moving around and being deleted).
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.19 (GNU/Linux)
 
 iEYEABECAAYFAlEAeCEACgkQMUfUDdst+ynRygCeNs8Z0Nt+/quZHKf+/DS4vlRt
 vBYAnAxbcPg1zWhMM+8AVt/YFYp83sfP
 =5UpK
 -----END PGP SIGNATURE-----

Merge tag 'usb-3.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull more USB fixes from Greg Kroah-Hartman:
 "Here are some more USB fixes for the 3.8-rc4 tree.

  Some gadget driver fixes, and finally resolved the ehci-mxc driver
  build issues (it's just some code moving around and being deleted)."

* tag 'usb-3.8-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: EHCI: fix build error in ehci-mxc
  USB: EHCI: add a name for the platform-private field
  USB: EHCI: fix incorrect configuration test
  USB: EHCI: Move definition of EHCI_STATS to ehci.h
  USB: UHCI: fix IRQ race during initialization
  usb: gadget: FunctionFS: Fix missing braces in parse_opts
  usb: dwc3: gadget: fix ep->maxburst for ep0
  ARM: i.MX clock: Change the connection-id for fsl-usb2-udc
  usb: gadget: fsl_mxc_udc: replace MX35_IO_ADDRESS to ioremap
  usb: gadget: fsl-mxc-udc: replace cpu_is_xxx() with platform_device_id
  usb: musb: cppi_dma: drop '__init' annotation
2013-01-23 20:11:35 -08:00
Linus Torvalds
248152b602 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k fixes from Geert Uytterhoeven:
 "The asm-generic changeset has been ack'ed by Arnd."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: Wire up finit_module
  asm-generic/dma-mapping-broken.h: Provide dma_alloc_attrs()/dma_free_attrs()
  m68k: Provide dma_alloc_attrs()/dma_free_attrs()
2013-01-23 13:31:15 -08:00
Linus Torvalds
c1b84144c2 - ELF coredump fix (more registers dumped than what user space expects)
- SUBARCH name generation (s/aarch64/arm64/)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJQ/tmmAAoJEGvWsS0AyF7xPysQAIy2hhlreSe49Fao9cohwQBD
 9lkDWKk5Mtdq2FTg+D1o7qW0nhJPlcskKHko9s/9OxFWHOOhRxHZoosr8+PT4Rm9
 7PRh5nEkJz5vzSIu4Q6il/uyRKBUFQ3UuSJ/GNeOOvySG8jHv9MlAAEUpW6+va04
 GJqX4l8DgLHo72IRiCEYZgDOsInvQg16EdBUBu5hwfV72lxMg9xF9E2eFbVN+cNj
 GVPIZGISO7o9ND2YnyPcYQCSRgwTcoDc9sps054R1sDfjzpT/vQF51yLF9Wif3iV
 xn43GLtqA5MRE9qCINm9FO3hyu2O0q8nWTGsqMQCsA78bxLdsRMp5WNDmC+TB//k
 e2jA7G2oTRVIrxLuu+VqxnfXJBE/VKmiER17m/lpl5bKNN2Zj5fEaG5YOBeaI3M5
 CQIYrvOt54Q+Kt8QUn4F094DFU01CWuah1lfpEfiVYZUOAtIC3vTcuCMmtL4ig4J
 ND5NqmzV52QyBX4Y5QTpbg+wlyzQC/yjMxyudZCY0CRjwQrQEZaj0jdCTNE9YFCg
 aXYE7KTwh+mU6wJP830aBgG0cZTKUSwlTSiG96fCoR9IxK9g+KE+8NRwYonJN73b
 Ctl4GzuX2ydGpUJL+swzpLSqolu5YuIfDErRAepPTLshezof4Rjgx6H1JvSMCDAw
 UBAVWaFHesHYjbgYzSg8
 =B9Hi
 -----END PGP SIGNATURE-----

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

Pull arm64 fixes from Catalin Marinas:
 - ELF coredump fix (more registers dumped than what user space expects)
 - SUBARCH name generation (s/aarch64/arm64/)

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: makefile: fix uname munging when setting ARCH on native machine
  arm64: elf: fix core dumping to match what glibc expects
2013-01-23 13:28:17 -08:00
Douglas Gilbert
8461c2f6fd ARM: at91/dts: correct comment in at91sam9x5.dtsi for mii
Concerning pinctrl_macb0_rmii_mii, values were okay, but not comments.

Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:40:51 +01:00
Nicolas Ferre
581d629974 ARM: at91/at91_dt_defconfig: add at91sam9n12 SoC to DT defconfig
Reported-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:39:58 +01:00
Nicolas Ferre
2e06e92c75 ARM: at91/at91_dt_defconfig: remove memory specification to cmdline
No need for this cmdline option as we are using DT.
Moreover this defconfig is targeted to multiple SoC/boards: this option
was nonsense.

Reported-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:39:57 +01:00
Boris BREZILLON
b45c998ea7 ARM: at91/dts: add macb mii pinctrl config for kizbox
This patch overrides default macb pinctrl config defined in
at91sam9260.dtsi (pinctrl_macb_rmii) with kizbox board config
(pinctrl_macb_rmii + pinctrl_macb_rmii_mii_alt).

Signed-off-by: Boris BREZILLON <linux-arm@overkiz.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:34:38 +01:00
Jean-Christophe PLAGNIOL-VILLARD
36224d0fe0 ARM: at91: rm9200: remake the BGA as default version
Make BGA as the default version as we are supposed to just have
to specify when we use the PQFP version.

Issue was existing since commit:
3e90772 (ARM: at91: fix at91rm9200 soc subtype handling).

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: stable <stable@vger.kernel.org> [v3.3]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:31:14 +01:00
Joachim Eastwood
334c9e8d6d ARM: at91: fix gpios on i2c-gpio for RM9200 DT
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:31:07 +01:00
Richard Genoud
1bab02ec1b ARM: at91/at91sam9x5 DTS: add SCK USART pins
The SCK pins where missing in usarts pinctrl.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:31:00 +01:00
Richard Genoud
c89cec3a40 ARM: at91/at91sam9x5 DTS: correct wrong PIO BANK values on u(s)arts
The PIN_BANK 3 is for PDxx pins, not PCxx pins.
And PIN_BANK 1 is for PBxx, not PIN_BANK 0.

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2013-01-23 10:30:54 +01:00
Sebastian Hesselbarth
09d75bc7d2 ARM: kirkwood: fix missing #interrupt-cells property
The gpio controller on kirkwood can provide interrupts but is missing
the #interrupt-cells property. This patch just adds it to both gpio
controllers.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-01-23 01:10:48 +00:00
Linus Torvalds
ed06ef318a perf/urgent fixes:
. revert 20b279 - require exclude_guest to use PEBS - kernel side,
   now older binaries will continue working for things like cycles:pp
   without needing to pass extra modifiers, from David Ahern.
 
 . Fix building from 'make perf-*-src-pkg' tarballs, broken by UAPI, from
   Sebastian Andrzej Siewior
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.14 (GNU/Linux)
 
 iQIcBAABAgAGBQJQ7yQhAAoJENZQFvNTUqpAjj4P/RR+8WeXpV02yzndhry+Yjav
 L/WQH0CkRRmyUA5akTcpgFrohJCEOi+auHl7ivmDX4XWFavcAkX3H1Yz1FytCOkb
 Cbb9Lv1rGdlTno8fTVUn8mNyTG64AlWrAw3ICixWw6q6I/k6SO7EkKigCxPhmY+2
 BE2EvkZmOY/PEUXgM6HtUdifORatX48p1toS7p3CDQ31cxBN5OVNZUXa1FakJpyH
 7R+1imKLsjuyi/G7Bt061LyWQkOh7L/ITWN+5Rx4RsUwRRT3vm1H9nlqUBsPS0PW
 qfkktkCmn/cFpKbfBipuglnt16jHPMfI/pghKvzx8n2uJMNEGXbfFDJefpzcdih9
 wIRgB6a5bvA8VF6Xpcn0I5JhqLAcnWTer07JgjZevjqYCdZStpbJjvE5131JjTLw
 Dnm7UshE+VFBcA3iXNX64p/X7WDJSk+SIDsJDuNe57dktFVLw76Ibb55XG18Ex7e
 c9QcIEhD1P19VzOniDZQZNEJhqnu5Vjle/eG+JRVRCm/BgoQFyJuD3EooKPN7hHR
 Op4oqf5RhDf7XNH0+Y4rOdRMZRiumdfcEl6kdcQGPJPycxpD7xCJNzBLWK/BvQgT
 Kl0AEkRC0KE2c5LyFttW+g1Byu1rctlMz2TVJDTskTm0XGOQ9mTzsQBP5rgBVt+b
 hQsMMWNVSI+jfm8bTJwx
 =LTjZ
 -----END PGP SIGNATURE-----

Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf/urgent fixes from Arnaldo Carvalho de Melo:

 . revert 20b279 - require exclude_guest to use PEBS - kernel side, now
   older binaries will continue working for things like cycles:pp
   without needing to pass extra modifiers, from David Ahern.

 . Fix building from 'make perf-*-src-pkg' tarballs, broken by UAPI,
   from Sebastian Andrzej Siewior

[ Pulling directly, Ingo would normally pull but has been unresponsive ]

* tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf tools: Fix building from 'make perf-*-src-pkg' tarballs
  perf x86: revert 20b279 - require exclude_guest to use PEBS - kernel side
2013-01-22 14:32:07 -08:00
Linus Torvalds
343391b1d1 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
 "Improve the stability of the linux kernel on the parisc architecture"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: sigaltstack doesn't round ss.ss_sp as required
  parisc: improve ptrace support for gdb single-step
  parisc: don't claim cpu irqs more than once
  parisc: avoid undefined shift in cnv_float.h
2013-01-22 14:30:35 -08:00
Olof Johansson
51edce0cce Minimal omap fixes for the -rc series:
- A build fix for recently merged omap DRM changes
 
 - Regression fixes from the common clock framework conversion
   for omap4 audio and omap2 reboot
 
 - Regression fix for pandaboard WLAN control UART muxing caused by
   u-boot only muxing essential pins nowadays
 
 - Timer iteration fix for CONFIG_OF_DYNAMIC
 
 - A section mismatch fix for ocp2scp init
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJQ/uNtAAoJEBvUPslcq6VzB5YP/jG2EiMhC3BeeBDQx8aeslM1
 JISbenieULnJFxJ3DwaEIdrfIkdhr7mdLL+72DNmAru21JlOOQUzzQy7v2HzYXzO
 O1kp2v6NXZ4/pNa0gRJrxUkf0yJalNsTTJMbakwkR5XJAUx6SPNQg1be1r24Ho0B
 G7FuGDSqv7pjdfEXP9NYW+PRtqcWU5Fh34YVIwn6rITlzf16/4xLW20dANPfVDlh
 QNuYWtZwgHBTiUnaurTUR1LgLr8lp1/bMSEbMGFixPgMZpIiEKalpWrboH76JofE
 osFII7LZV5XUfQP5f0KhRrCBQ292lzuFCDUwmcnYC1yK/XY/XcVNSyj4Xcfb4Kqb
 QXTIH9ryxCrMUXgoT3aYHGpKthnxDnyP6SwSlCzmdixWyovmqI1U4cW/qRFkL5In
 0L9suw2+nxkiPCPX0glHvteZqiPI0sq8ZxrFEiqhFxqQ2Y1r5L5tQJ/NMxHbohPt
 hu4CILApIKrCiaFeAmN2/q8Ho69wacnxVqIkVf///B9UnenrZ9wEm8k00aXk6Kop
 CbtHxQKpWJu87a2IVc9Fo6Cm63o9eHt+Z98iFy5yyEEVQRKCZ8bbCoIvt7WLXsTN
 cQ3/ZmK/XTETKNN08JsZ54VrJzZMW0RuXi2bMZpTygpEUpbEs9L5kLGZCzlf9kS5
 M2IFN8e2yDb0ljzR7wFf
 =GTdk
 -----END PGP SIGNATURE-----

Merge tag 'omap-for-v3.8-rc4/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

From Tony Lindgren:
Minimal omap fixes for the -rc series:

- A build fix for recently merged omap DRM changes

- Regression fixes from the common clock framework conversion
  for omap4 audio and omap2 reboot

- Regression fix for pandaboard WLAN control UART muxing caused by
  u-boot only muxing essential pins nowadays

- Timer iteration fix for CONFIG_OF_DYNAMIC

- A section mismatch fix for ocp2scp init

* tag 'omap-for-v3.8-rc4/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (306 commits)
  ARM: OMAP2+: omap4-panda: add UART2 muxing for WiLink shared transport
  ARM: OMAP2+: DT node Timer iteration fix
  ARM: OMAP2+: Fix section warning for omap_init_ocp2scp()
  ARM: OMAP2+: fix build break for omapdrm
  ARM: OMAP2: Fix missing omap2xxx_clkt_vps_late_init function calls
  ARM: OMAP4: hwmod_data: Correct IDLEMODE for McPDM
  ARM: OMAP4: clock data: Lock ABE DPLL on all revisions
  + Linux 3.8-rc4

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-01-22 11:20:29 -08:00
Oleg Nesterov
9899d11f65 ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL
putreg() assumes that the tracee is not running and pt_regs_access() can
safely play with its stack.  However a killed tracee can return from
ptrace_stop() to the low-level asm code and do RESTORE_REST, this means
that debugger can actually read/modify the kernel stack until the tracee
does SAVE_REST again.

set_task_blockstep() can race with SIGKILL too and in some sense this
race is even worse, the very fact the tracee can be woken up breaks the
logic.

As Linus suggested we can clear TASK_WAKEKILL around the arch_ptrace()
call, this ensures that nobody can ever wakeup the tracee while the
debugger looks at it.  Not only this fixes the mentioned problems, we
can do some cleanups/simplifications in arch_ptrace() paths.

Probably ptrace_unfreeze_traced() needs more callers, for example it
makes sense to make the tracee killable for oom-killer before
access_process_vm().

While at it, add the comment into may_ptrace_stop() to explain why
ptrace_stop() still can't rely on SIGKILL and signal_pending_state().

Reported-by: Salman Qazi <sqazi@google.com>
Reported-by: Suleiman Souhlal <suleiman@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-01-22 10:08:00 -08:00