Currently, intel_pstate is unable to control P-states on my
IvyBridge-based Acer Aspire S5, because they are controlled by SMM
on that machine by default and it is necessary to request OS control
of P-states from it via the SMI Command register exposed in the ACPI
FADT. intel_pstate doesn't do that now, but acpi-cpufreq and other
cpufreq drivers for x86 platforms do.
Address this problem by making intel_pstate use the ACPI-defined
mechanism as well. However, intel_pstate is not modular and it
doesn't need the module refcount tricks played by
acpi_processor_notify_smm(), so export the core of this function
to it as acpi_processor_pstate_control() and make it call that.
[The changes in processor_perflib.c related to this should not
make any functional difference for the acpi_processor_notify_smm()
users].
To be safe, only call acpi_processor_notify_smm() from intel_pstate
if ACPI _PPC support is enabled in it.
Suggested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Add the compatible strings for supporting the generic cpufreq driver on
the Renesas RZ/G1M (r8a7743) and RZ/G1E (r8a7745) SoCs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The original comment about the frequency increase to maximum is wrong.
Both increase and decrease happen at steps.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
What's returned from this function is the delta by which the frequency
must be increased or decreased and not the final frequency that should
be selected.
Name it properly to match its purpose. Also update the variables used to
store that value.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
lpstate_idx remains uninitialized in the case when elapsed_time
is greater than MAX_RAMP_DOWN_TIME. At the end of rampdown the
global pstate should be equal to the local pstate.
Fixes: 20b15b7663 (cpufreq: powernv: Use PMCR to verify global and localpstate)
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Use get_target_pstate_use_cpu_load() to calculate target P-State for
devices, with the preferred power management profile in ACPI FADT
set to PM_MOBILE.
This may help in resolving some thermal issues caused by low sustained
cpu bound workloads. The current algorithm tend to over provision in this
case as it doesn't look at the CPU busyness.
Also included the fix from Arnd Bergmann <arnd@arndb.de> to solve compile
issue, when CONFIG_ACPI is not defined.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
For device-tree based pxa25x and pxa27x platforms, cpufreq-dt driver is
doing the job as well as pxa2xx-cpufreq, so add these platforms to the
compatibility list.
This won't work for legacy non device-tree platforms where
pxa2xx-cpufreq is still required.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Allow CPUfreq statistics to be cleared by writing anything to
/sys/.../cpufreq/stats/reset.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The earlier implementation of governors used background timers and so
functions, mutex, etc had 'timer' keyword in their names.
But that's not true anymore. Replace 'timer' with 'update', as those
functions, variables are based around updates to frequency.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
As fast_switch() may get called with interrupt disable mode, we cannot
hold a mutex to update the global_pstate_info. So currently, fast_switch()
does not update the global_pstate_info and it will end up with stale data
whenever pstate is updated through fast_switch().
As the gpstate_timer can fire after fast_switch() has updated the pstates,
the timer handler cannot rely on the cached values of local and global
pstate and needs to read it from the PMCR.
Only gpstate_timer_handler() is affected by the stale cached pstate data
beacause either fast_switch() or target_index() routines will be called
for a given govenor, but gpstate_timer can fire after the governor has
changed to schedutil.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Adding fast_switch which does light weight operation to set the desired
pstate. Both global and local pstates are set to the same desired pstate.
Signed-off-by: Akshay Adiga <akshay.adiga@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fixes the following sparse warning:
drivers/cpufreq/brcmstb-avs-cpufreq.c:982:18: warning:
symbol 'brcm_avs_cpufreq_attr' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The limits variable gets modified from intel_pstate sysfs and also gets
modified from cpufreq sysfs. So protect with a mutex to keep data
integrity, when they are getting modified from multiple threads.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
In order to aid debugging, we add a debugfs interface to the driver
that allows direct interaction with the AVS co-processor.
The debugfs interface provides a means for reading all and writing some
of the mailbox registers directly from the shell prompt and enables a
user to execute the communications protocol between ARM CPU and AVS CPU
step-by-step.
This interface should be used for debugging purposes only.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This driver supports voltage and frequency scaling on Broadcom STB SoCs
using AVS firmware with DFS and DVFS support.
Actual frequency or voltage scaling is done exclusively by the AVS
firmware. The driver merely provides a standard CPUfreq interface to
other kernel components and userland, and instructs the AVS firmware to
perform frequency or voltage changes on its behalf.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add the binding document for the new brcmstb-avs-cpufreq driver.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Add compatible strings for Pro5, PXs2, LD6b, LD11, LD20 SoCs to use
the generic cpufreq driver.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Additional command line control to enable per core performance
control.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Document restriction on per core P-State control.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
When policy->max and policy->min are same, in some cases they don't
result in the same frequency cap. The max_policy_pct is rounded up but
not min_perf_pct. So even when they are same, results in different
percentage or maximum and minimum.
Since minimum is a conservative value for power, a lower value without
rounding is better in most of the cases, unless user wants
policy->max = policy->min.
This change uses use the same policy percentage when policy->max and
policy->min are same.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Intel P-State offers two interface to set performance limits:
- Intel P-State sysfs
/sys/devices/system/cpu/intel_pstate/max_perf_pct
/sys/devices/system/cpu/intel_pstate/min_perf_pct
- cpufreq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
In the current implementation both of the above methods, change limits
to every CPU in the system. Moreover the limits placed using cpufreq
policy interface also presented in the Intel P-State sysfs via modified
max_perf_pct and min_per_pct during sysfs reads. This allows to check
percent of reduced/increased performance, irrespective of method used to
limit.
There are some new generations of processors, where it is possible to
have limits placed on individual CPU cores. Using cpufreq interface it
is possible to set limits on each CPU. But the current processing will
use last limits placed on all CPUs. So the per core limit feature of
CPUs can't be used.
This change brings in capability to set P-States limits for each CPU,
with some limitations. In this case what should be the read of
max_perf_pct and min_perf_pct? It can be most restrictive limits placed
on any CPU or max possible performance on any given CPU on which no
limits are placed. In either case someone will have issue.
So the consensus is, we can't have both sysfs controls present when user
wants to use limit per core limits.
- By default per-core-control feature is not enabled. So no one will
notice any difference.
- The way to enable is by kernel command line
intel_pstate=per_cpu_perf_limits
- When the per-core-controls are enabled there is no display of for both
read and write on
/sys/devices/system/cpu/intel_pstate/max_perf_pct
/sys/devices/system/cpu/intel_pstate/min_perf_pct
- User can change limits using
/sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_min_freq
/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
- User can still observe turbo percent and number of P-States from
/sys/devices/system/cpu/intel_pstate/turbo_pct
/sys/devices/system/cpu/intel_pstate/num_pstates
- User can read write system wide turbo status
/sys/devices/system/cpu/no_turbo
While changing this BUG_ON is changed to WARN_ON, as they are not fatal
errors for the system.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After switching the core module clocks controlling the Integrator
clock frequencies to the common clock framework, defining the
operating points in the device tree, and activating the generic
DT-based CPUfreq driver, we can retire the old Integrator
cpufreq driver.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This enables the generic DT and OPP-based cpufreq driver on the
ARM Integrator/AP and Integrator/CP.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The only times at which intel_pstate checks the policy set for
a given CPU is the initialization of that CPU and updates of its
policy settings from cpufreq when intel_pstate_set_policy() is
invoked.
That is insufficient, however, because intel_pstate uses the same
P-state selection function for all CPUs regardless of the policy
setting for each of them and the P-state limits are shared between
them. Thus if the policy is set to "performance" for a particular
CPU, it may not behave as expected if the cpufreq settings are
changed subsequently for another CPU.
That can be easily demonstrated by writing "performance" to
scaling_governor for all CPUs and then switching it to "powersave"
for one of them in which case all of the CPUs will behave as though
their scaling_governor were all "powersave" (even though the policy
still appears to be "performance" for the remaining CPUs).
Fix this problem by modifying intel_pstate_adjust_busy_pstate() to
always set the P-state to the maximum allowed by the current limits
for all CPUs whose policy is set to "performance".
Note that it still is recommended to always change the policy setting
in the same way for all CPUs even with this fix applied to avoid
confusion.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After commit a4675fbc4a (cpufreq: intel_pstate: Replace timers with
utilization update callbacks) the cpufreq governor callbacks may not
be invoked on NOHZ_FULL CPUs and, in particular, switching to the
"performance" policy via sysfs may not have any effect on them. That
is a problem, because it usually is desirable to squeeze the last
bit of performance out of those CPUs, so work around it by setting
the maximum P-state (within the limits) in intel_pstate_set_policy()
upfront when the policy is CPUFREQ_POLICY_PERFORMANCE.
Fixes: a4675fbc4a (cpufreq: intel_pstate: Replace timers with utilization update callbacks)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
PID tuning is not available when the get_target_pstate_use_cpu_load()
is used to calculate target_state. So update the documentation.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
When target state is calculated using get_target_pstate_use_cpu_load(),
PID controller is not used, hence it has no effect on performance.
So don't present debugfs entries to tune PID controller.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The "IOwait boosting" mechanism is only used by the
get_target_pstate_use_cpu_load() governor function and the
boost_iowait flag in pid_params is always set when that function
is in use (and it is never set otherwise). This means that the
boost_iowait flag is in fact redundant and may be dropped.
For this reason, replace the boost_iowait flag check in
intel_pstate_update_util() with an equivalent check against
pstate_funcs.get_target_pstate and drop that flag.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
MODULE_DEVICE_TABLE is added so that CPPC cpufreq module can be
automatically loaded when we have a acpi processor device with
"ACPI0007" hid.
Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Merge tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs
Pull befs fixes from Luis de Bethencourt:
"I recently took maintainership of the befs file system [0]. This is
the first time I send you a git pull request, so please let me know if
all the below is OK.
Salah Triki and myself have been cleaning the code and fixing a few
small bugs.
Sorry I couldn't send this sooner in the merge window, I was waiting
to have my GPG key signed by kernel members at ELCE in Berlin a few
days ago."
[0] https://lkml.org/lkml/2016/7/27/502
* tag 'befs-v4.9-rc1' of git://github.com/luisbg/linux-befs: (39 commits)
befs: befs: fix style issues in datastream.c
befs: improve documentation in datastream.c
befs: fix typos in datastream.c
befs: fix typos in btree.c
befs: fix style issues in super.c
befs: fix comment style
befs: add check for ag_shift in superblock
befs: dump inode_size superblock information
befs: remove unnecessary initialization
befs: fix typo in befs_sb_info
befs: add flags field to validate superblock state
befs: fix typo in befs_find_key
befs: remove unused BEFS_BT_PARMATCH
fs: befs: remove ret variable
fs: befs: remove in vain variable assignment
fs: befs: remove unnecessary *befs_sb variable
fs: befs: remove useless initialization to zero
fs: befs: remove in vain variable assignment
fs: befs: Insert NULL inode to dentry
fs: befs: Remove useless calls to brelse in befs_find_brun_dblindirect
...
extract as much possible uncertainty from a running system at boot time as
possible, hoping to capitalize on any possible variation in CPU operation
(due to runtime data differences, hardware differences, SMP ordering,
thermal timing variation, cache behavior, etc).
At the very least, this plugin is a much more comprehensive example for
how to manipulate kernel code using the gcc plugin internals.
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Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc plugins update from Kees Cook:
"This adds a new gcc plugin named "latent_entropy". It is designed to
extract as much possible uncertainty from a running system at boot
time as possible, hoping to capitalize on any possible variation in
CPU operation (due to runtime data differences, hardware differences,
SMP ordering, thermal timing variation, cache behavior, etc).
At the very least, this plugin is a much more comprehensive example
for how to manipulate kernel code using the gcc plugin internals"
* tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
latent_entropy: Mark functions with __latent_entropy
gcc-plugins: Add latent_entropy plugin
Pull MIPS updates from Ralf Baechle:
"This is the main MIPS pull request for 4.9:
MIPS core arch code:
- traps: 64bit kernels should read CP0_EBase 64bit
- traps: Convert ebase to KSEG0
- c-r4k: Drop bc_wback_inv() from icache flush
- c-r4k: Split user/kernel flush_icache_range()
- cacheflush: Use __flush_icache_user_range()
- uprobes: Flush icache via kernel address
- KVM: Use __local_flush_icache_user_range()
- c-r4k: Fix flush_icache_range() for EVA
- Fix -mabi=64 build of vdso.lds
- VDSO: Drop duplicated -I*/-E* aflags
- tracing: move insn_has_delay_slot to a shared header
- tracing: disable uprobe/kprobe on compact branch instructions
- ptrace: Fix regs_return_value for kernel context
- Squash lines for simple wrapper functions
- Move identification of VP(E) into proc.c from smp-mt.c
- Add definitions of SYNC barrierstype values
- traps: Ensure full EBase is written
- tlb-r4k: If there are wired entries, don't use TLBINVF
- Sanitise coherentio semantics
- dma-default: Don't check hw_coherentio if device is non-coherent
- Support per-device DMA coherence
- Adjust MIPS64 CAC_BASE to reflect Config.K0
- Support generating Flattened Image Trees (.itb)
- generic: Introduce generic DT-based board support
- generic: Convert SEAD-3 to a generic board
- Enable hardened usercopy
- Don't specify STACKPROTECTOR in defconfigs
Octeon:
- Delete dead code and files across the platform.
- Change to use all memory into use by default.
- Rename upper case variables in setup code to lowercase.
- Delete legacy hack for broken bootloaders.
- Leave maintaining the link state to the actual ethernet/PHY drivers.
- Add DTS for D-Link DSR-500N.
- Fix PCI interrupt routing on D-Link DSR-500N.
Pistachio:
- Remove ANDROID_TIMED_OUTPUT from defconfig
TX39xx:
- Move GPIO setup from .mem_setup() to .arch_init()
- Convert to Common Clock Framework
TX49xx:
- Move GPIO setup from .mem_setup() to .arch_init()
- Convert to Common Clock Framework
txx9wdt:
- Add missing clock (un)prepare calls for CCF
BMIPS:
- Add PW, GPIO SDHCI and NAND device node names
- Support APPENDED_DTB
- Add missing bcm97435svmb to DT_NONE
- Rename bcm96358nb4ser to bcm6358-neufbox4-sercom
- Add DT examples for BCM63268, BCM3368 and BCM6362
- Add support for BCM3368 and BCM6362
PCI
- Reduce stack frame usage
- Use struct list_head lists
- Support for CONFIG_PCI_DOMAINS_GENERIC
- Make pcibios_set_cache_line_size an initcall
- Inline pcibios_assign_all_busses
- Split pci.c into pci.c & pci-legacy.c
- Introduce CONFIG_PCI_DRIVERS_LEGACY
- Support generic drivers
CPC
- Convert bare 'unsigned' to 'unsigned int'
- Avoid lock when MIPS CM >= 3 is present
GIC:
- Delete unused file smp-gic.c
mt7620:
- Delete unnecessary assignment for the field "owner" from PCI
BCM63xx:
- Let clk_disable() return immediately if clk is NULL
pm-cps:
- Change FSB workaround to CPU blacklist
- Update comments on barrier instructions
- Use MIPS standard lightweight ordering barrier
- Use MIPS standard completion barrier
- Remove selection of sync types
- Add MIPSr6 CPU support
- Support CM3 changes to Coherence Enable Register
SMP:
- Wrap call to mips_cpc_lock_other in mips_cm_lock_other
- Introduce mechanism for freeing and allocating IPIs
cpuidle:
- cpuidle-cps: Enable use with MIPSr6 CPUs.
SEAD3:
- Rewrite to use DT and generic kernel feature.
USB:
- host: ehci-sead3: Remove SEAD-3 EHCI code
FBDEV:
- cobalt_lcdfb: Drop SEAD3 support
dt-bindings:
- Document a binding for simple ASCII LCDs
auxdisplay:
- img-ascii-lcd: driver for simple ASCII LCD displays
irqchip i8259:
- i8259: Add domain before mapping parent irq
- i8259: Allow platforms to override poll function
- i8259: Remove unused i8259A_irq_pending
Malta:
- Rewrite to use DT
of/platform:
- Probe "isa" busses by default
CM:
- Print CM error reports upon bus errors
Module:
- Migrate exception table users off module.h and onto extable.h
- Make various drivers explicitly non-modular:
- Audit and remove any unnecessary uses of module.h
mailmap:
- Canonicalize to Qais' current email address.
Documentation:
- MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
Loongson1C:
- Add CPU support for Loongson1C
- Add board support
- Add defconfig
- Add RTC support for Loongson1C board
All this except one Documentation fix has sat in linux-next and has
survived Imagination's automated build test system"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (127 commits)
Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API
MIPS: ptrace: Fix regs_return_value for kernel context
MIPS: VDSO: Drop duplicated -I*/-E* aflags
MIPS: Fix -mabi=64 build of vdso.lds
MIPS: Enable hardened usercopy
MIPS: generic: Convert SEAD-3 to a generic board
MIPS: generic: Introduce generic DT-based board support
MIPS: Support generating Flattened Image Trees (.itb)
MIPS: Adjust MIPS64 CAC_BASE to reflect Config.K0
MIPS: Print CM error reports upon bus errors
MIPS: Support per-device DMA coherence
MIPS: dma-default: Don't check hw_coherentio if device is non-coherent
MIPS: Sanitise coherentio semantics
MIPS: PCI: Support generic drivers
MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY
MIPS: PCI: Split pci.c into pci.c & pci-legacy.c
MIPS: PCI: Inline pcibios_assign_all_busses
MIPS: PCI: Make pcibios_set_cache_line_size an initcall
MIPS: PCI: Support for CONFIG_PCI_DOMAINS_GENERIC
MIPS: PCI: Use struct list_head lists
...
Just a few trivial small fixes.
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Merge tag 'sound-fix-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Just a few trivial small fixes"
* tag 'sound-fix-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: line6: fix a crash in line6_hwdep_write()
ALSA: seq: fix passing wrong pointer in function call of compatibility layer
ALSA: hda - Fix a failure of micmute led when having multi adcs
ALSA: line6: Fix POD X3 Live audio input
Pull more misc uaccess and vfs updates from Al Viro:
"The rest of the stuff from -next (more uaccess work) + assorted fixes"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
score: traps: Add missing include file to fix build error
fs/super.c: don't fool lockdep in freeze_super() and thaw_super() paths
fs/super.c: fix race between freeze_super() and thaw_super()
overlayfs: Fix setting IOP_XATTR flag
iov_iter: kernel-doc import_iovec() and rw_copy_check_uvector()
blackfin: no access_ok() for __copy_{to,from}_user()
arm64: don't zero in __copy_from_user{,_inatomic}
arm: don't zero in __copy_from_user_inatomic()/__copy_from_user()
arc: don't leak bits of kernel stack into coredump
alpha: get rid of tail-zeroing in __copy_user()
Pull cifs fixes from Steve French:
"Including:
- nine bug fixes for stable. Some of these we found at the recent two
weeks of SMB3 test events/plugfests.
- significant improvements in reconnection (e.g. if server or network
crashes) especially when mounted with "persistenthandles" or to
server which advertises Continuous Availability on the share.
- a new mount option "idsfromsid" which improves POSIX compatibility
in some cases (when winbind not configured e.g.) by better (and
faster) fetching uid/gid from acl (when "cifsacl" mount option is
enabled). NB: we are almost complete work on "cifsacl" (querying
mode/uid/gid from ACL) for SMB3, but SMB3 support for cifsacl is
not included in this set.
- improved handling for SMB3 "credits" (even if server is buggy)
Still working on two sets of changes:
- cifsacl enablement for SMB3
- cleanup of RFC1001 length calculation (so we can handle encryption
and multichannel and RDMA)
And a couple of new bugs were reported recently (unrelated to above)
so will probably have another merge request next week"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (21 commits)
CIFS: Retrieve uid and gid from special sid if enabled
CIFS: Add new mount option to set owner uid and gid from special sids in acl
CIFS: Reset read oplock to NONE if we have mandatory locks after reopen
CIFS: Fix persistent handles re-opening on reconnect
SMB2: Separate RawNTLMSSP authentication from SMB2_sess_setup
SMB2: Separate Kerberos authentication from SMB2_sess_setup
Expose cifs module parameters in sysfs
Cleanup missing frees on some ioctls
Enable previous version support
Do not send SMB3 SET_INFO request if nothing is changing
SMB3: Add mount parameter to allow user to override max credits
fs/cifs: reopen persistent handles on reconnect
Clarify locking of cifs file and tcon structures and make more granular
Fix regression which breaks DFS mounting
fs/cifs: keep guid when assigning fid to fileinfo
SMB3: GUIDs should be constructed as random but valid uuids
Set previous session id correctly on SMB3 reconnect
cifs: Limit the overall credit acquired
Display number of credits available
Add way to query creation time of file via cifs xattr
...
Pull btrfs fixes from Chris Mason:
"Some fixes from Omar and Dave Sterba for our new free space tree.
This isn't heavily used yet, but as we move toward making it the new
default we wanted to nail down an endian bug"
* 'for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: tests: uninline member definitions in free_space_extent
btrfs: tests: constify free space extent specs
Btrfs: expand free space tree sanity tests to catch endianness bug
Btrfs: fix extent buffer bitmap tests on big-endian systems
Btrfs: catch invalid free space trees
Btrfs: fix mount -o clear_cache,space_cache=v2
Btrfs: fix free space tree bitmaps on big-endian systems
score images fail to build as follows.
arch/score/kernel/traps.c: In function 'show_stack':
arch/score/kernel/traps.c:55:3: error:
implicit declaration of function '__get_user'
__get_user() is declared in asm/uaccess.h, which was previously included
through asm/module.h.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 88dd4a748d ("score: separate extable.h, switch module.h to it")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
sb_wait_write()->percpu_rwsem_release() fools lockdep to avoid the
false-positives. Now that xfs was fixed by Dave's commit dbad7c9930
("xfs: stop holding ILOCK over filldir callbacks") we can remove it and
change freeze_super() and thaw_super() to run with s_writers.rw_sem locks
held; we add two trivial helpers for that, lockdep_sb_freeze_release()
and lockdep_sb_freeze_acquire().
xfstests-dev/check `grep -il freeze tests/*/???` does not trigger any
warning from lockdep.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull overlayfs updates from Miklos Szeredi:
"This update contains fixes to the "use mounter's permission to access
underlying layers" area, and miscellaneous other fixes and cleanups.
No new features this time"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: use vfs_get_link()
vfs: add vfs_get_link() helper
ovl: use generic_readlink
ovl: explain error values when removing acl from workdir
ovl: Fix info leak in ovl_lookup_temp()
ovl: during copy up, switch to mounter's creds early
ovl: lookup: do getxattr with mounter's permission
ovl: copy_up_xattr(): use strnlen
Change thaw_super() to check frozen != SB_FREEZE_COMPLETE rather than
frozen == SB_UNFROZEN, otherwise it can race with freeze_super() which
drops sb->s_umount after SB_FREEZE_WRITE to preserve the lock ordering.
In this case thaw_super() will wrongly call s_op->unfreeze_fs() before
it was actually frozen, and call sb_freeze_unlock() which leads to the
unbalanced percpu_up_write(). Unfortunately lockdep can't detect this,
so this triggers misc BUG_ON()'s in kernel/rcu/sync.c.
Reported-and-tested-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
ovl_fill_super calls ovl_new_inode to create a root inode for the new
superblock before initializing sb->s_xattr. This wrongly causes
IOP_XATTR to be cleared in i_opflags of the new inode, causing SELinux
to log the following message:
SELinux: (dev overlay, type overlay) has no xattr support
Fix this by initializing sb->s_xattr and similar fields before calling
ovl_new_inode.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Both import_iovec() and rw_copy_check_uvector() take an array
(typically small and on-stack) which is used to hold an iovec array copy
from userspace. This is to avoid an expensive memory allocation in the
fast path (i.e. few iovec elements).
The caller may have to check whether these functions actually used
the provided buffer or allocated a new one -- but this differs between
the too. Let's just add a kernel doc to clarify what the semantics are
for each function.
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This update consists of:
- Fixes and improvements to existing tests
- Moving code from Documentation to selftests, samples, and tools.
Moves dnotify_test, prctl, ptp, vDSO, ia64, watchdog, and networking
tests from Documentation to selftests.
Moves mic/mpssd, misc-devices/mei, timers, watchdog, auxdisplay, and
blackfin examples from Documentation to samples.
Moves accounting, laptops/dslm, and pcmcia/crc32hash tools from
Documentation to tools.
Deletes BUILD_DOCSRC and its dependencies.
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Merge tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan:
"This update consists of:
- Fixes and improvements to existing tests
- Moving code from Documentation to selftests, samples, and tools:
* Moves dnotify_test, prctl, ptp, vDSO, ia64, watchdog, and
networking tests from Documentation to selftests.
* Moves mic/mpssd, misc-devices/mei, timers, watchdog, auxdisplay,
and blackfin examples from Documentation to samples.
* Moves accounting, laptops/dslm, and pcmcia/crc32hash tools from
Documentation to tools.
* Deletes BUILD_DOCSRC and its dependencies"
* tag 'linux-kselftest-4.9-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (21 commits)
selftests/futex: Check ANSI terminal color support
Doc: update 00-INDEX files to reflect the runnable code move
samples: move blackfin gptimers-example from Documentation
tools: move pcmcia crc32hash tool from Documentation
tools: move laptops dslm tool from Documentation
tools: move accounting tool from Documentation
samples: move auxdisplay example code from Documentation
samples: move watchdog example code from Documentation
samples: move timers example code from Documentation
samples: move misc-devices/mei example code from Documentation
samples: move mic/mpssd example code from Documentation
selftests: Move networking/timestamping from Documentation
selftests: move watchdog tests from Documentation/watchdog
selftests: move ia64 tests from Documentation/ia64
selftests: move vDSO tests from Documentation/vDSO
selftests: move ptp tests from Documentation/ptp
selftests: move prctl tests from Documentation/prctl
selftests: move dnotify_test from Documentation/filesystems
selftests/timers: Add missing error code assignment before test
selftests/zram: replace ZRAM_LZ4_COMPRESS
...
Pull misc kbuild changes from Michal Marek:
"Just a few patches on the kbuild.git#misc branch this time:
- New Coccinelle patch by Nicholas Mc Guire
- Existing patch fixes by Julia Lawall
- Minor comment fix by Markus Elfring"
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
Coccinelle: flag conditions with no effect
scripts/coccicheck: Update reference for the corresponding documentation
Coccinelle: pm_runtime: ensure relevance of pm_runtime reports
Coccinelle: limit memdup_user transformation to GFP_KERNEL case
