Commit Graph

647856 Commits

Author SHA1 Message Date
Geert Uytterhoeven
6197aa65c4 clk: renesas: cpg-mssr: Add support for reset control
Add optional support for the Reset Control feature of the Renesas Clock
Pulse Generator / Module Standby and Software Reset module on R-Car
Gen2, R-Car Gen3, and RZ/G1 SoCs.

This allows to reset SoC devices using the Reset Controller API.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
2017-01-27 08:59:00 +01:00
Geert Uytterhoeven
a4ea6a0f83 clk: renesas: cpg-mssr: Rename cpg_mssr_priv.mstp_lock
The spinlock is used to protect Read-Modify-Write register accesses,
which won't be limited to SMSTPCR register accesses.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-27 08:58:59 +01:00
Geert Uytterhoeven
67c995b55e clk: renesas: cpg-mssr: Document suitability for RZ/G1
The Renesas CPG/MSSR driver is already in active use for RZ/G1 since
commits c0b2d75d2a ("clk: renesas: cpg-mssr: Add R8A7743 support")
and 9127d54bb8 ("clk: renesas: cpg-mssr: Add R8A7745 support").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-27 08:58:59 +01:00
Geert Uytterhoeven
98aabfff7d dt-bindings: clock: renesas: cpg-mssr: Document reset control support
Document properties needed to use the Reset Control feature of the
Renesas Clock Pulse Generator / Module Standby and Software Reset
module.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2017-01-27 08:58:58 +01:00
Geert Uytterhoeven
1ce87dd2f0 clk: renesas: mstp: Reformat cpg_mstp_clock_register() for git diff
As the function header of cpg_mstp_clock_register() is split in an
unusual way, "git diff" gets confused when changes to the body of
the function are made, and attributes them to the wrong function.

Reformat the function header to fix this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-27 08:58:17 +01:00
Geert Uytterhoeven
e34084fb9a clk: renesas: mstp: Make INTC-SYS a critical clock
INTC-SYS is the module clock for the GIC.  Accessing the GIC while it is
disabled causes:

    Unhandled fault: asynchronous external abort (0x1211) at 0x00000000

Currently, the GIC-400 driver cannot enable its module clock for several
reasons:
  - It does not use a platform device, so Runtime PM is not an option,
  - gic_of_init() runs before any clocks are registered, so it cannot
    enable the clock explicitly,
  - gic_of_init() cannot return -EPROBE_DEFER, as IRQCHIP_DECLARE()
    doesn't support deferred probing.

Hence we have to keep on relying on the boot loader for enabling the
module clock.

To prevent the module clock from being disabled when the CCF core thinks
it is unused, and thus causing a system lock-up, add a check to the MSTP
clock driver and enable CLK_IS_CRITICAL. This will make sure the module
clock is never disabled.

This is a hard dependency for describing the INTC-SYS clock in DT on
R-Mobile APE6 and R-Car Gen2.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-23 11:04:46 +01:00
Geert Uytterhoeven
72f5df2c2b clk: renesas: cpg-mssr: Migrate to CLK_IS_CRITICAL
When the Renesas CPG/MSSR driver was introduced, it was anticipated that
critical clocks would be handled through a new CLK_ENABLE_HAND_OFF flag
soon.  However, CLK_ENABLE_HAND_OFF never made it upstream.

Instead, commit 32b9b10961 ("clk: Allow clocks to be marked as
CRITICAL") introduced CLK_IS_CRITICAL, a flag with slightly differing
semantics.  Still, it can be used to prevent e.g. the GIC module clock
from being turned off, until the GIC-400 driver has full support for
Runtime PM.

Hence migrate the Renesas CPG/MSSR driver from CLK_ENABLE_HAND_OFF to
CLK_IS_CRITICAL.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2017-01-23 11:04:45 +01:00
Hiromitsu Yamasaki
e6bdf28eff clk: renesas: r8a7796: Add MSIOF controller clocks
This patch adds MSIOF{0,1,2,3} clocks for R8A7796 SoC.

Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-12-27 10:56:08 +01:00
Chris Paterson
0ece46c24f clk: renesas: r8a7796: Add CAN FD peripheral clock
Based on a patch for r8a7795 by Ramesh Shanmugasundaram.

Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-12-27 10:56:08 +01:00
Chris Paterson
9e620beecd clk: renesas: r8a7796: Add CANFD clock
Based on a patch for r8a7795 by Ramesh Shanmugasundaram.

Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-12-27 10:56:07 +01:00
Chris Paterson
e00d20c99d clk: renesas: r8a7796: Add CAN peripheral clock
Based on a patch for r8a7795 by Ramesh Shanmugasundaram.

Signed-off-by: Chris Paterson <chris.paterson2@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
2016-12-27 10:56:07 +01:00
Linus Torvalds
7ce7d89f48 Linux 4.10-rc1 2016-12-25 16:13:08 -08:00
Larry Finger
8ae679c4bc powerpc: Fix build warning on 32-bit PPC
I am getting the following warning when I build kernel 4.9-git on my
PowerBook G4 with a 32-bit PPC processor:

    AS      arch/powerpc/kernel/misc_32.o
  arch/powerpc/kernel/misc_32.S:299:7: warning: "CONFIG_FSL_BOOKE" is not defined [-Wundef]

This problem is evident after commit 989cea5c14 ("kbuild: prevent
lib-ksyms.o rebuilds"); however, this change in kbuild only exposes an
error that has been in the code since 2005 when this source file was
created.  That was with commit 9994a33865 ("powerpc: Introduce
entry_{32,64}.S, misc_{32,64}.S, systbl.S").

The offending line does not make a lot of sense.  This error does not
seem to cause any errors in the executable, thus I am not recommending
that it be applied to any stable versions.

Thanks to Nicholas Piggin for suggesting this solution.

Fixes: 9994a33865 ("powerpc: Introduce entry_{32,64}.S, misc_{32,64}.S, systbl.S")
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-25 16:12:20 -08:00
Linus Torvalds
d33d5a6c88 avoid spurious "may be used uninitialized" warning
The timer type simplifications caused a new gcc warning:

  drivers/base/power/domain.c: In function ‘genpd_runtime_suspend’:
  drivers/base/power/domain.c:562:14: warning: ‘time_start’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));

despite the actual use of "time_start" not having changed in any way.
It appears that simply changing the type of ktime_t from a union to a
plain scalar type made gcc check the use.

The variable wasn't actually used uninitialized, but gcc apparently
failed to notice that the conditional around the use was exactly the
same as the conditional around the initialization of that variable.

Add an unnecessary initialization just to shut up the compiler.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-25 14:56:58 -08:00
Linus Torvalds
3ddc76dfc7 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer type cleanups from Thomas Gleixner:
 "This series does a tree wide cleanup of types related to
  timers/timekeeping.

   - Get rid of cycles_t and use a plain u64. The type is not really
     helpful and caused more confusion than clarity

   - Get rid of the ktime union. The union has become useless as we use
     the scalar nanoseconds storage unconditionally now. The 32bit
     timespec alike storage got removed due to the Y2038 limitations
     some time ago.

     That leaves the odd union access around for no reason. Clean it up.

  Both changes have been done with coccinelle and a small amount of
  manual mopping up"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  ktime: Get rid of ktime_equal()
  ktime: Cleanup ktime_set() usage
  ktime: Get rid of the union
  clocksource: Use a plain u64 instead of cycle_t
2016-12-25 14:30:04 -08:00
Linus Torvalds
b272f732f8 Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP hotplug notifier removal from Thomas Gleixner:
 "This is the final cleanup of the hotplug notifier infrastructure. The
  series has been reintgrated in the last two days because there came a
  new driver using the old infrastructure via the SCSI tree.

  Summary:

   - convert the last leftover drivers utilizing notifiers

   - fixup for a completely broken hotplug user

   - prevent setup of already used states

   - removal of the notifiers

   - treewide cleanup of hotplug state names

   - consolidation of state space

  There is a sphinx based documentation pending, but that needs review
  from the documentation folks"

* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/armada-xp: Consolidate hotplug state space
  irqchip/gic: Consolidate hotplug state space
  coresight/etm3/4x: Consolidate hotplug state space
  cpu/hotplug: Cleanup state names
  cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
  staging/lustre/libcfs: Convert to hotplug state machine
  scsi/bnx2i: Convert to hotplug state machine
  scsi/bnx2fc: Convert to hotplug state machine
  cpu/hotplug: Prevent overwriting of callbacks
  x86/msr: Remove bogus cleanup from the error path
  bus: arm-ccn: Prevent hotplug callback leak
  perf/x86/intel/cstate: Prevent hotplug callback leak
  ARM/imx/mmcd: Fix broken cpu hotplug handling
  scsi: qedi: Convert to hotplug state machine
2016-12-25 14:05:56 -08:00
Linus Torvalds
10bbe7599e Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull turbostat updates from Len Brown.

* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: remove obsolete -M, -m, -C, -c options
  tools/power turbostat: Make extensible via the --add parameter
  tools/power turbostat: Denverton uses a 25 MHz crystal, not 19.2 MHz
  tools/power turbostat: line up headers when -M is used
  tools/power turbostat: fix SKX PKG_CSTATE_LIMIT decoding
  tools/power turbostat: Support Knights Mill (KNM)
  tools/power turbostat: Display HWP OOB status
  tools/power turbostat: fix Denverton BCLK
  tools/power turbostat: use intel-family.h model strings
  tools/power/turbostat: Add Denverton RAPL support
  tools/power/turbostat: Add Denverton support
  tools/power/turbostat: split core MSR support into status + limit
  tools/power turbostat: fix error case overflow read of slm_freq_table[]
  tools/power turbostat: Allocate correct amount of fd and irq entries
  tools/power turbostat: switch to tab delimited output
  tools/power turbostat: Gracefully handle ACPI S3
  tools/power turbostat: tidy up output on Joule counter overflow
2016-12-25 14:01:28 -08:00
Nicholas Piggin
6290602709 mm: add PageWaiters indicating tasks are waiting for a page bit
Add a new page flag, PageWaiters, to indicate the page waitqueue has
tasks waiting. This can be tested rather than testing waitqueue_active
which requires another cacheline load.

This bit is always set when the page has tasks on page_waitqueue(page),
and is set and cleared under the waitqueue lock. It may be set when
there are no tasks on the waitqueue, which will cause a harmless extra
wakeup check that will clears the bit.

The generic bit-waitqueue infrastructure is no longer used for pages.
Instead, waitqueues are used directly with a custom key type. The
generic code was not flexible enough to have PageWaiters manipulation
under the waitqueue lock (which simplifies concurrency).

This improves the performance of page lock intensive microbenchmarks by
2-3%.

Putting two bits in the same word opens the opportunity to remove the
memory barrier between clearing the lock bit and testing the waiters
bit, after some work on the arch primitives (e.g., ensuring memory
operand widths match and cover both bits).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-25 11:54:48 -08:00
Nicholas Piggin
6326fec112 mm: Use owner_priv bit for PageSwapCache, valid when PageSwapBacked
A page is not added to the swap cache without being swap backed,
so PageSwapBacked mappings can use PG_owner_priv_1 for PageSwapCache.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Bob Peterson <rpeterso@redhat.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Andrew Lutomirski <luto@kernel.org>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-25 11:54:48 -08:00
Thomas Gleixner
1f3a8e49d8 ktime: Get rid of ktime_equal()
No point in going through loops and hoops instead of just comparing the
values.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
2016-12-25 17:21:23 +01:00
Thomas Gleixner
8b0e195314 ktime: Cleanup ktime_set() usage
ktime_set(S,N) was required for the timespec storage type and is still
useful for situations where a Seconds and Nanoseconds part of a time value
needs to be converted. For anything where the Seconds argument is 0, this
is pointless and can be replaced with a simple assignment.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
2016-12-25 17:21:22 +01:00
Thomas Gleixner
2456e85535 ktime: Get rid of the union
ktime is a union because the initial implementation stored the time in
scalar nanoseconds on 64 bit machine and in a endianess optimized timespec
variant for 32bit machines. The Y2038 cleanup removed the timespec variant
and switched everything to scalar nanoseconds. The union remained, but
become completely pointless.

Get rid of the union and just keep ktime_t as simple typedef of type s64.

The conversion was done with coccinelle and some manual mopping up.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
2016-12-25 17:21:22 +01:00
Thomas Gleixner
a5a1d1c291 clocksource: Use a plain u64 instead of cycle_t
There is no point in having an extra type for extra confusion. u64 is
unambiguous.

Conversion was done with the following coccinelle script:

@rem@
@@
-typedef u64 cycle_t;

@fix@
typedef cycle_t;
@@
-cycle_t
+u64

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
2016-12-25 11:04:12 +01:00
Thomas Gleixner
008b69e4d5 irqchip/armada-xp: Consolidate hotplug state space
The mpic is either the main interrupt controller or is cascaded behind a
GIC. The mpic is single instance and the modes are mutually exclusive, so
there is no reason to have seperate cpu hotplug states.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/20161221192112.333161745@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:44 +01:00
Thomas Gleixner
6896bcd198 irqchip/gic: Consolidate hotplug state space
Even if both drivers are compiled in only one instance can run on a given
system depending on the available GIC version.

So having seperate hotplug states for them is pointless.


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192112.252416267@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:44 +01:00
Thomas Gleixner
36e5b0e391 coresight/etm3/4x: Consolidate hotplug state space
Even if both drivers are compiled in only one instance can run on a given
system depending on the available tracer cell.

So having seperate hotplug states for them is pointless.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: http://lkml.kernel.org/r/20161221192112.162765484@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:44 +01:00
Thomas Gleixner
73c1b41e63 cpu/hotplug: Cleanup state names
When the state names got added a script was used to add the extra argument
to the calls. The script basically converted the state constant to a
string, but the cleanup to convert these strings into meaningful ones did
not happen.

Replace all the useless strings with 'subsys/xxx/yyy:state' strings which
are used in all the other places already.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:44 +01:00
Thomas Gleixner
530e9b76ae cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
hotcpu_notifier(), cpu_notifier(), __hotcpu_notifier(), __cpu_notifier(),
register_hotcpu_notifier(), register_cpu_notifier(),
__register_hotcpu_notifier(), __register_cpu_notifier(),
unregister_hotcpu_notifier(), unregister_cpu_notifier(),
__unregister_hotcpu_notifier(), __unregister_cpu_notifier()

are unused now. Remove them and all related code.

Remove also the now pointless cpu notifier error injection mechanism. The
states can be executed step by step and error rollback is the same as cpu
down, so any state transition can be tested w/o requiring the notifier
error injection.

Some CPU hotplug states are kept as they are (ab)used for hotplug state
tracking.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161221192112.005642358@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:43 +01:00
Anna-Maria Gleixner
7b737965b3 staging/lustre/libcfs: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: devel@driverdev.osuosl.org
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Oleg Drokin <oleg.drokin@intel.com>
Cc: rt@linutronix.de
Cc: lustre-devel@lists.lustre.org
Link: http://lkml.kernel.org/r/20161202110027.htzzeervzkoc4muv@linutronix.de
Link: http://lkml.kernel.org/r/20161221192111.922872524@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:43 +01:00
Sebastian Andrzej Siewior
e210faa235 scsi/bnx2i: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.

This is the minimal fixup so we can remove the hotplug notifier mess
completely.

The real rework of this driver to use work queues is still stuck in
review/testing on the SCSI mailing list.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: QLogic-Storage-Upstream@qlogic.com
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20161221192111.836895753@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:43 +01:00
Sebastian Andrzej Siewior
c53b005dd6 scsi/bnx2fc: Convert to hotplug state machine
Install the callbacks via the state machine. No functional change.

This is the minimal fixup so we can remove the hotplug notifier mess
completely.

The real rework of this driver to use work queues is still stuck in
review/testing on the SCSI mailing list.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Cc: QLogic-Storage-Upstream@qlogic.com
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20161221192111.757309869@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:42 +01:00
Thomas Gleixner
dc280d9362 cpu/hotplug: Prevent overwriting of callbacks
Developers manage to overwrite states blindly without thought. That's fatal
and hard to debug. Add sanity checks to make it fail.

This requries to restructure the code so that the dynamic state allocation
happens in the same lock protected section as the actual store. Otherwise
the previous assignment of 'Reserved' to the name field would trigger the
overwrite check.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Link: http://lkml.kernel.org/r/20161221192111.675234535@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:42 +01:00
Thomas Gleixner
59fefd0890 x86/msr: Remove bogus cleanup from the error path
The error cleanup which is invoked when the hotplug state setup failed
tries to remove the failed state, which is broken.

Fixes: 8fba38c937 ("x86/msr: Convert to hotplug state machine")
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
2016-12-25 10:47:41 +01:00
Thomas Gleixner
26242b3300 bus: arm-ccn: Prevent hotplug callback leak
In case the driver registration fails, the hotplug callback is leaked.

Not fatal, because it's never invoked as there are no instances registered,
but wrong nevertheless.

Fixes: fdc15a36d8 ("bus/arm-ccn: Convert to hotplug statemachine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
2016-12-25 10:47:40 +01:00
Thomas Gleixner
834fcd2980 perf/x86/intel/cstate: Prevent hotplug callback leak
If the pmu registration fails the registered hotplug callbacks are not
removed. Wrong in any case, but fatal in case of a modular driver.

Replace the nonsensical state names with proper ones while at it.

Fixes: 77c34ef1c3 ("perf/x86/intel/cstate: Convert Intel CSTATE to hotplug state machine")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
2016-12-25 10:47:40 +01:00
Thomas Gleixner
a051f220d6 ARM/imx/mmcd: Fix broken cpu hotplug handling
The cpu hotplug support of this perf driver is broken in several ways:

1) It adds a instance before setting up the state.

2) The state for the instance is different from the state of the
   callback. It's just a randomly chosen state.

3) The instance registration is not error checked so nobody noticed that
   the call can never succeed.

4) The state for the multi install callbacks is chosen randomly and
   overwrites existing state. This is now prevented by the core code so the
   call is guaranteed to fail.

5) The error exit path in the init function leaves the instance registered
   and then frees the memory which contains the enqueued hlist node.

6) The remove function is removing the state and not the instance.

Fix it by:

- Setting up the state before adding instances. Use a dynamically allocated
  state for it.

- Installing instances after the state has been set up

- Removing the instance in the error path before freeing memory

- Removing the instance not the state in the driver remove callback

While at is use raw_cpu_processor_id(), because cpu_processor_id() cannot
be used in preemptible context, and set the driver data after successful
registration of the pmu.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Frank Li <frank.li@nxp.com>
Cc: Zhengyu Shen <zhengyu.shen@nxp.com>
Link: http://lkml.kernel.org/r/20161221192111.596204211@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-12-25 10:47:40 +01:00
Thomas Gleixner
a98d1a0ca6 scsi: qedi: Convert to hotplug state machine
The CPU hotplug code is a trainwreck. It leaks a notifier in case of driver
registration error and the per cpu loop is racy against cpu hotplug. Aside
of that the driver should have been written and merged with the new state
machine interfaces in the first place.

Mop up the mess and Convert it to the hotplug state machine.

Signed-off-by: Thomas Grumpy Gleixner <tglx@linutronix.de>
Cc: Nilesh Javali <nilesh.javali@cavium.com>
Cc: Adheer Chandravanshi <adheer.chandravanshi@qlogic.com>
Cc: Chad Dupuis <chad.dupuis@cavium.com>
Cc: Saurav Kashyap <saurav.kashyap@cavium.com>
Cc: Arun Easi <arun.easi@cavium.com>
Cc: Manish Rangankar <manish.rangankar@cavium.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
2016-12-25 10:47:18 +01:00
Len Brown
6886fee4d7 tools/power turbostat: remove obsolete -M, -m, -C, -c options
The new --add option has replaced the -M, -m, -C, -c options
Eg.

-M 0x10 is now --add msr0x10,raw
-m 0x10 is now --add msr0x10,raw,u32
-C 0x10 is now --add msr0x10,delta
-c 0x10 is now --add msr0x10,delta,u32

The --add option can be repeated to add any number of counters,
while the previous options were limited to adding one of each type.

In addition, the --add option can accept a column label,
and can also display a counter as a percentage of elapsed cycles.

Eg. --add msr0x3fe,core,percent,MY_CC3

Signed-off-by: Len Brown <len.brown@intel.com>
2016-12-24 15:38:09 -05:00
Len Brown
388e9c8134 tools/power turbostat: Make extensible via the --add parameter
Create the "--add" parameter.  This can be used to teach an existing
turbostat binary about any number of any type of counter.

turbostat(8) details the syntax for --add.

Signed-off-by: Len Brown <len.brown@intel.com>
2016-12-24 15:16:10 -05:00
Linus Torvalds
7c0f6ba682 Replace <asm/uaccess.h> with <linux/uaccess.h> globally
This was entirely automated, using the script by Al:

  PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>'
  sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \
        $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h)

to do the replacement at the end of the merge window.

Requested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-12-24 11:46:01 -08:00
Linus Torvalds
1dd5c6b153 Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
 "This ncludes various cifs/smb3 bug fixes, mostly for stable as well.

  In the next week I expect that Germano will have some reconnection
  fixes, and also I expect to have the remaining pieces of the snapshot
  enablement and SMB3 ACLs, but wanted to get this set of bug fixes in"

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  cifs_get_root shouldn't use path with tree name
  Fix default behaviour for empty domains and add domainauto option
  cifs: use %16phN for formatting md5 sum
  cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack
  CIFS: Fix a possible double locking of mutex during reconnect
  CIFS: Fix a possible memory corruption during reconnect
  CIFS: Fix a possible memory corruption in push locks
  CIFS: Fix missing nls unload in smb2_reconnect()
  CIFS: Decrease verbosity of ioctl call
  SMB3: parsing for new snapshot timestamp mount parm
2016-12-24 11:37:18 -08:00
Linus Torvalds
3a77fa8544 Watchdog updates for v4.10
New driver for Add Loongson1 SoC.
 Minor cleanup and fixes in various drivers.
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Merge tag 'watchdog-for-linus-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull watchdog updates from Wim Van Sebroeck and Guenter Roeck:

 - new driver for Add Loongson1 SoC

 - minor cleanup and fixes in various drivers

* tag 'watchdog-for-linus-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  watchdog: it87_wdt: add IT8620E ID
  watchdog: mpc8xxx: Remove unneeded linux/miscdevice.h include
  watchdog: octeon: Remove unneeded linux/miscdevice.h include
  watchdog: bcm2835_wdt: set WDOG_HW_RUNNING bit when appropriate
  watchdog: loongson1: Add Loongson1 SoC watchdog driver
  watchdog: cpwd: remove memory allocate failure message
  watchdog: da9062/61: watchdog driver
  intel-mid_wdt: Error code is just an integer
  intel-mid_wdt: make sure watchdog is not running at startup
  watchdog: mei_wdt: request stop on reboot to prevent false positive event
  watchdog: hpwdt: changed maintainer information
  watchdog: jz4740: Fix modular build
  watchdog: qcom: fix kernel panic due to external abort on non-linefetch
  watchdog: davinci: add support for deferred probing
  watchdog: meson: Remove unneeded platform MODULE_ALIAS
  watchdog: Standardize leading tabs and spaces in Kconfig file
  watchdog: max77620_wdt: fix module autoload
  watchdog: bcm7038_wdt: fix module autoload
2016-12-24 11:27:45 -08:00
Linus Torvalds
01e0d6037d NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
and correcting a free_irq inconsistency.  It adds Intel SKX support.
 Finally, it changes the AMD NTB maintainer, and fixes some bugs present
 there.
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Merge tag 'ntb-4.10' of git://github.com/jonmason/ntb

Pull NTB update from Jon Mason:

 - NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
   and correcting a free_irq inconsistency

 - add Intel SKX support

 - change the AMD NTB maintainer, and fix some bugs present there

* tag 'ntb-4.10' of git://github.com/jonmason/ntb:
  ntb_transport: Remove unnecessary call to ntb_peer_spad_read
  NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
  ntb: fix SKX NTB config space size register offsets
  NTB: correct ntb_peer_spad_read for case when callback is not supplied.
  MAINTAINERS: Change in maintainer for AMD NTB
  ntb_transport: Limit memory windows based on available, scratchpads
  NTB: Register and offset values fix for memory window
  NTB: add support for hotplug feature
  ntb: Adding Skylake Xeon NTB support
2016-12-24 11:23:24 -08:00
Linus Torvalds
6ac3bb167f Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "There's a number of fixes:

   - a round of fixes for CPUID-less legacy CPUs
   - a number of microcode loader fixes
   - i8042 detection robustization fixes
   - stack dump/unwinder fixes
   - x86 SoC platform driver fixes
   - a GCC 7 warning fix
   - virtualization related fixes"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
  Revert "x86/unwind: Detect bad stack return address"
  x86/paravirt: Mark unused patch_default label
  x86/microcode/AMD: Reload proper initrd start address
  x86/platform/intel/quark: Add printf attribute to imr_self_test_result()
  x86/platform/intel-mid: Switch MPU3050 driver to IIO
  x86/alternatives: Do not use sync_core() to serialize I$
  x86/topology: Document cpu_llc_id
  x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
  x86/asm: Rewrite sync_core() to use IRET-to-self
  x86/microcode/intel: Replace sync_core() with native_cpuid()
  Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"
  x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
  x86/cpu: Probe CPUID leaf 6 even when cpuid_level == 6
  x86/tools: Fix gcc-7 warning in relocs.c
  x86/unwind: Dump stack data on warnings
  x86/unwind: Adjust last frame check for aligned function stacks
  x86/init: Fix a couple of comment typos
  x86/init: Remove i8042_detect() from platform ops
  Input: i8042 - Trust firmware a bit more when probing on X86
  x86/init: Add i8042 state to the platform data
  ...
2016-12-23 16:54:46 -08:00
Linus Torvalds
eb3e8d9de2 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Ingo Molnar:
 "ARM/MOXA SoC clocksource driver fixes"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/moxart: Plug memory and mapping leaks
2016-12-23 16:51:16 -08:00
Linus Torvalds
00198dab3b Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "On the kernel side there's two x86 PMU driver fixes and a uprobes fix,
  plus on the tooling side there's a number of fixes and some late
  updates"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  perf sched timehist: Fix invalid period calculation
  perf sched timehist: Remove hardcoded 'comm_width' check at print_summary
  perf sched timehist: Enlarge default 'comm_width'
  perf sched timehist: Honour 'comm_width' when aligning the headers
  perf/x86: Fix overlap counter scheduling bug
  perf/x86/pebs: Fix handling of PEBS buffer overflows
  samples/bpf: Move open_raw_sock to separate header
  samples/bpf: Remove perf_event_open() declaration
  samples/bpf: Be consistent with bpf_load_program bpf_insn parameter
  tools lib bpf: Add bpf_prog_{attach,detach}
  samples/bpf: Switch over to libbpf
  perf diff: Do not overwrite valid build id
  perf annotate: Don't throw error for zero length symbols
  perf bench futex: Fix lock-pi help string
  perf trace: Check if MAP_32BIT is defined (again)
  samples/bpf: Make perf_event_read() static
  uprobes: Fix uprobes on MIPS, allow for a cache flush after ixol breakpoint creation
  samples/bpf: Make samples more libbpf-centric
  tools lib bpf: Add flags to bpf_create_map()
  tools lib bpf: use __u32 from linux/types.h
  ...
2016-12-23 16:49:12 -08:00
Linus Torvalds
9004fda595 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
 "A build warning fix with certain .config's"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/st: Mark st_irq_syscfg_resume() __maybe_unused
2016-12-23 16:47:25 -08:00
Steve Wahl
dfb7d24c5a ntb_transport: Remove unnecessary call to ntb_peer_spad_read
The results were previously ignored, anyway.

Signed-off-by: Steve Wahl <Steve.Wahl@dell.com>
Fixes: e26a5843f7
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-12-23 16:11:07 -05:00
Christophe JAILLET
28734e8f69 NTB: Fix 'request_irq()' and 'free_irq()' inconsistancy
'request_irq()' and 'free_irq()' should have the same 'dev_id'.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-12-23 16:11:03 -05:00
Dave Jiang
09e71a6f13 ntb: fix SKX NTB config space size register offsets
The offsets for the SZ registers are wrong. Updated.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reported-by: Sandeep Mann <sandeep@purestorage.com>
Tested-by: Zachary Ross <zacharyx.ross@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
2016-12-23 16:10:54 -05:00