New pseudo-filesystem: nsfs. Targets of /proc/*/ns/* live there now.
It's not mountable (not even registered, so it's not in /proc/filesystems,
etc.). Files on it *are* bindable - we explicitly permit that in do_loopback().
This stuff lives in fs/nsfs.c now; proc_ns_fget() moved there as well.
get_proc_ns() is a macro now (it's simply returning ->i_private; would
have been an inline, if not for header ordering headache).
proc_ns_inode() is an ex-parrot. The interface used in procfs is
ns_get_path(path, task, ops) and ns_get_name(buf, size, task, ops).
Dentries and inodes are never hashed; a non-counting reference to dentry
is stashed in ns_common (removed by ->d_prune()) and reused by ns_get_path()
if present. See ns_get_path()/ns_prune_dentry/nsfs_evict() for details
of that mechanism.
As the result, proc_ns_follow_link() has stopped poking in nd->path.mnt;
it does nd_jump_link() on a consistent <vfsmount,dentry> pair it gets
from ns_get_path().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
a) make get_proc_ns() return a pointer to struct ns_common
b) mirror ns_ops in dentry->d_fsdata of ns dentries, so that
is_mnt_ns_file() could get away with fewer dereferences.
That way struct proc_ns becomes invisible outside of fs/proc/*.c
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
for now - just move corresponding ->proc_inum instances over there
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Another week, another small batch of fixes.
Most of these make zynq, socfpga and sunxi platforms work a bit
better:
* Due to new requirements for regulators, DWMMC on socfpga broke past 3.17.
* SMP spinup fix for socfpga
* A few DT fixes for zynq
* Another option (FIXED_REGULATOR) for sunxi is needed that used to be selected
by other options but no longer is.
* A couple of small DT fixes for at91
* ...and a couple for i.MX.
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Merge tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Another week, another small batch of fixes.
Most of these make zynq, socfpga and sunxi platforms work a bit
better:
- due to new requirements for regulators, DWMMC on socfpga broke past
v3.17
- SMP spinup fix for socfpga
- a few DT fixes for zynq
- another option (FIXED_REGULATOR) for sunxi is needed that used to
be selected by other options but no longer is.
- a couple of small DT fixes for at91
- ...and a couple for i.MX"
* tag 'armsoc-for-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: imx28-evk: Let i2c0 run at 100kHz
ARM: i.MX6: Fix "emi" clock name typo
ARM: multi_v7_defconfig: enable CONFIG_MMC_DW_ROCKCHIP
ARM: sunxi_defconfig: enable CONFIG_REGULATOR_FIXED_VOLTAGE
ARM: dts: socfpga: Add a 3.3V fixed regulator node
ARM: dts: socfpga: Fix SD card detect
ARM: dts: socfpga: rename gpio nodes
ARM: at91/dt: sam9263: fix PLLB frequencies
power: reset: at91-reset: fix power down register
MAINTAINERS: add atmel ssc driver maintainer entry
arm: socfpga: fix fetching cpu1start_addr for SMP
ARM: zynq: DT: trivial: Fix mc node
ARM: zynq: DT: Add cadence watchdog node
ARM: zynq: DT: Add missing reference for memory-controller
ARM: zynq: DT: Add missing reference for ADC
ARM: zynq: DT: Add missing address for L2 pl310
ARM: zynq: DT: Remove 222 MHz OPP
ARM: zynq: DT: Fix GEM register area size
Fix a typo error, the "emi" names refer to the eim clocks.
The change fixes typo in EIM and EIM_SLOW pre-output dividers and
selectors clock names. Notably EIM_SLOW clock itself is named correctly.
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
[vladimir_zapolskiy@mentor.com: ported to v3.17]
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
as what I usually had for the _whole_ rc period.
There are a few bad bugs where the guest can OOPS or crash the host. We
have also started looking at attack models for nested virtualization;
bugs that usually result in the guest ring 0 crashing itself become
more worrisome if you have nested virtualization, because the nested
guest might bring down the non-nested guest as well. For current
uses of nested virtualization these do not really have a security
impact, but you never know and bugs are bugs nevertheless.
A lot of these bugs are in 3.17 too, resulting in a large number of
stable@ Ccs. I checked that all the patches apply there with no
conflicts.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"This is a pretty large update. I think it is roughly as big as what I
usually had for the _whole_ rc period.
There are a few bad bugs where the guest can OOPS or crash the host.
We have also started looking at attack models for nested
virtualization; bugs that usually result in the guest ring 0 crashing
itself become more worrisome if you have nested virtualization,
because the nested guest might bring down the non-nested guest as
well. For current uses of nested virtualization these do not really
have a security impact, but you never know and bugs are bugs
nevertheless.
A lot of these bugs are in 3.17 too, resulting in a large number of
stable@ Ccs. I checked that all the patches apply there with no
conflicts"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: vfio: fix unregister kvm_device_ops of vfio
KVM: x86: Wrong assertion on paging_tmpl.h
kvm: fix excessive pages un-pinning in kvm_iommu_map error path.
KVM: x86: PREFETCH and HINT_NOP should have SrcMem flag
KVM: x86: Emulator does not decode clflush well
KVM: emulate: avoid accessing NULL ctxt->memopp
KVM: x86: Decoding guest instructions which cross page boundary may fail
kvm: x86: don't kill guest on unknown exit reason
kvm: vmx: handle invvpid vm exit gracefully
KVM: x86: Handle errors when RIP is set during far jumps
KVM: x86: Emulator fixes for eip canonical checks on near branches
KVM: x86: Fix wrong masking on relative jump/call
KVM: x86: Improve thread safety in pit
KVM: x86: Prevent host from panicking on shared MSR writes.
KVM: x86: Check non-canonical addresses upon WRMSR
optimized away by GCC. This is important when we are wiping
cryptographically sensitive material.
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Merge tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random
Pull /dev/random updates from Ted Ts'o:
"This adds a memzero_explicit() call which is guaranteed not to be
optimized away by GCC. This is important when we are wiping
cryptographically sensitive material"
* tag 'random_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
crypto: memzero_explicit - make sure to clear out sensitive data
random: add and use memzero_explicit() for clearing data
- Fix for a recent PCI power management change that overlooked
the fact that some IRQ chips might not be able to configure
PCIe PME for system wakeup from Lucas Stach.
- Fix for a bug introduced in 3.17 where acpi_device_wakeup()
is called with a wrong ordering of arguments from Zhang Rui.
- A bunch of intel_pstate driver fixes (all -stable candidates)
from Dirk Brandewie, Gabriele Mazzotta and Pali Rohár.
- Fixes for a rather long-standing problem with the OOM killer
and the freezer that frozen processes killed by the OOM do
not actually release any memory until they are thawed, so
OOM-killing them is rather pointless, with a couple of
cleanups on top (Michal Hocko, Cong Wang, Rafael J Wysocki).
- ACPICA update to upstream release 20140926, inlcuding mostly
cleanups reducing differences between the upstream ACPICA and
the kernel code, tools changes (acpidump, acpiexec) and
support for the _DDN object (Bob Moore, Lv Zheng).
- New PM QoS class for memory bandwidth from Tomeu Vizoso.
- Default 32-bit DMA mask for platform devices enumerated by ACPI
(this change is mostly needed for some drivers development in
progress targeted at 3.19) from Heikki Krogerus.
- ACPI EC driver cleanups, mostly related to debugging, from
Lv Zheng.
- cpufreq-dt driver updates from Thomas Petazzoni.
- powernv cpuidle driver update from Preeti U Murthy.
/
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Merge tag 'pm+acpi-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI and power management updates from Rafael Wysocki:
"This is material that didn't make it to my 3.18-rc1 pull request for
various reasons, mostly related to timing and travel (LinuxCon EU /
LPC) plus a couple of fixes for recent bugs.
The only really new thing here is the PM QoS class for memory
bandwidth, but it is simple enough and users of it will be added in
the next cycle. One major change in behavior is that platform devices
enumerated by ACPI will use 32-bit DMA mask by default. Also included
is an ACPICA update to a new upstream release, but that's mostly
cleanups, changes in tools and similar. The rest is fixes and
cleanups mostly.
Specifics:
- Fix for a recent PCI power management change that overlooked the
fact that some IRQ chips might not be able to configure PCIe PME
for system wakeup from Lucas Stach.
- Fix for a bug introduced in 3.17 where acpi_device_wakeup() is
called with a wrong ordering of arguments from Zhang Rui.
- A bunch of intel_pstate driver fixes (all -stable candidates) from
Dirk Brandewie, Gabriele Mazzotta and Pali Rohár.
- Fixes for a rather long-standing problem with the OOM killer and
the freezer that frozen processes killed by the OOM do not actually
release any memory until they are thawed, so OOM-killing them is
rather pointless, with a couple of cleanups on top (Michal Hocko,
Cong Wang, Rafael J Wysocki).
- ACPICA update to upstream release 20140926, inlcuding mostly
cleanups reducing differences between the upstream ACPICA and the
kernel code, tools changes (acpidump, acpiexec) and support for the
_DDN object (Bob Moore, Lv Zheng).
- New PM QoS class for memory bandwidth from Tomeu Vizoso.
- Default 32-bit DMA mask for platform devices enumerated by ACPI
(this change is mostly needed for some drivers development in
progress targeted at 3.19) from Heikki Krogerus.
- ACPI EC driver cleanups, mostly related to debugging, from Lv
Zheng.
- cpufreq-dt driver updates from Thomas Petazzoni.
- powernv cpuidle driver update from Preeti U Murthy"
* tag 'pm+acpi-3.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (34 commits)
intel_pstate: Correct BYT VID values.
intel_pstate: Fix BYT frequency reporting
intel_pstate: Don't lose sysfs settings during cpu offline
cpufreq: intel_pstate: Reflect current no_turbo state correctly
cpufreq: expose scaling_cur_freq sysfs file for set_policy() drivers
cpufreq: intel_pstate: Fix setting max_perf_pct in performance policy
PCI / PM: handle failure to enable wakeup on PCIe PME
ACPI: invoke acpi_device_wakeup() with correct parameters
PM / freezer: Clean up code after recent fixes
PM: convert do_each_thread to for_each_process_thread
OOM, PM: OOM killed task shouldn't escape PM suspend
freezer: remove obsolete comments in __thaw_task()
freezer: Do not freeze tasks killed by OOM killer
ACPI / platform: provide default DMA mask
cpuidle: powernv: Populate cpuidle state details by querying the device-tree
cpufreq: cpufreq-dt: adjust message related to regulators
cpufreq: cpufreq-dt: extend with platform_data
cpufreq: allow driver-specific data
ACPI / EC: Cleanup coding style.
ACPI / EC: Refine event/query debugging messages.
...
Pull thermal management updates from Zhang Rui:
"Sorry that I missed the merge window as there is a bug found in the
last minute, and I have to fix it and wait for the code to be tested
in linux-next tree for a few days. Now the buggy patch has been
dropped entirely from my next branch. Thus I hope those changes can
still be merged in 3.18-rc2 as most of them are platform thermal
driver changes.
Specifics:
- introduce ACPI INT340X thermal drivers.
Newer laptops and tablets may have thermal sensors and other
devices with thermal control capabilities that are exposed for the
OS to use via the ACPI INT340x device objects. Several drivers are
introduced to expose the temperature information and cooling
ability from these objects to user-space via the normal thermal
framework.
From: Lu Aaron, Lan Tianyu, Jacob Pan and Zhang Rui.
- introduce a new thermal governor, which just uses a hysteresis to
switch abruptly on/off a cooling device. This governor can be used
to control certain fan devices that can not be throttled but just
switched on or off. From: Peter Feuerer.
- introduce support for some new thermal interrupt functions on
i.MX6SX, in IMX thermal driver. From: Anson, Huang.
- introduce tracing support on thermal framework. From: Punit
Agrawal.
- small fixes in OF thermal and thermal step_wise governor"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits)
Thermal: int340x thermal: select ACPI fan driver
Thermal: int3400_thermal: use acpi_thermal_rel parsing APIs
Thermal: int340x_thermal: expose acpi thermal relationship tables
Thermal: introduce int3403 thermal driver
Thermal: introduce INT3402 thermal driver
Thermal: move the KELVIN_TO_MILLICELSIUS macro to thermal.h
ACPI / Fan: support INT3404 thermal device
ACPI / Fan: add ACPI 4.0 style fan support
ACPI / fan: convert to platform driver
ACPI / fan: use acpi_device_xxx_power instead of acpi_bus equivelant
ACPI / fan: remove no need check for device pointer
ACPI / fan: remove unused macro
Thermal: int3400 thermal: register to thermal framework
Thermal: int3400 thermal: add capability to detect supporting UUIDs
Thermal: introduce int3400 thermal driver
ACPI: add ACPI_TYPE_LOCAL_REFERENCE support to acpi_extract_package()
ACPI: make acpi_create_platform_device() an external API
thermal: step_wise: fix: Prevent from binary overflow when trend is dropping
ACPI: introduce ACPI int340x thermal scan handler
thermal: Added Bang-bang thermal governor
...
Add a simple read-only counter to super_block that indicates how deep this
is in the stack of filesystems. Previously ecryptfs was the only stackable
filesystem and it explicitly disallowed multiple layers of itself.
Overlayfs, however, can be stacked recursively and also may be stacked
on top of ecryptfs or vice versa.
To limit the kernel stack usage we must limit the depth of the
filesystem stack. Initially the limit is set to 2.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This adds a new RENAME_WHITEOUT flag. This flag makes rename() create a
whiteout of source. The whiteout creation is atomic relative to the
rename.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Whiteout isn't actually a new file type, but is represented as a char
device (Linus's idea) with 0/0 device number.
This has several advantages compared to introducing a new whiteout file
type:
- no userspace API changes (e.g. trivial to make backups of upper layer
filesystem, without losing whiteouts)
- no fs image format changes (you can boot an old kernel/fsck without
whiteout support and things won't break)
- implementation is trivial
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
It's already duplicated in btrfs and about to be used in overlayfs too.
Move the sticky bit check to an inline helper and call the out-of-line
helper only in the unlikly case of the sticky bit being set.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
We need to be able to check inode permissions (but not filesystem implied
permissions) for stackable filesystems. Expose this interface for overlayfs.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Add a new inode operation i_op->dentry_open(). This is for stacked filesystems
that want to return a struct file from a different filesystem.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
function, where an architecture can override it by providing a strong
version.
Some header file declarations included the "weak" attribute. That's
error-prone because it causes every implementation to be weak, with no
strong version at all, and the linker chooses one based on link order.
What we want is the "weak" attribute only on the *definition* of the
default implementation. These changes remove "weak" from the declarations,
leaving it on the default definitions.
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Merge tag 'remove-weak-declarations' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull weak function declaration removal from Bjorn Helgaas:
"The "weak" attribute is commonly used for the default version of a
function, where an architecture can override it by providing a strong
version.
Some header file declarations included the "weak" attribute. That's
error-prone because it causes every implementation to be weak, with no
strong version at all, and the linker chooses one based on link order.
What we want is the "weak" attribute only on the *definition* of the
default implementation. These changes remove "weak" from the
declarations, leaving it on the default definitions"
* tag 'remove-weak-declarations' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
uprobes: Remove "weak" from function declarations
memory-hotplug: Remove "weak" from memory_block_size_bytes() declaration
kgdb: Remove "weak" from kgdb_arch_pc() declaration
ARC: kgdb: generic kgdb_arch_pc() suffices
vmcore: Remove "weak" from function declarations
clocksource: Remove "weak" from clocksource_default_clock() declaration
x86, intel-mid: Remove "weak" from function declarations
audit: Remove "weak" from audit_classify_compat_syscall() declaration
Pull x86 EFI updates from Peter Anvin:
"This patchset falls under the "maintainers that grovel" clause in the
v3.18-rc1 announcement. We had intended to push it late in the merge
window since we got it into the -tip tree relatively late.
Many of these are relatively simple things, but there are a couple of
key bits, especially Ard's and Matt's patches"
* 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
rtc: Disable EFI rtc for x86
efi: rtc-efi: Export platform:rtc-efi as module alias
efi: Delete the in_nmi() conditional runtime locking
efi: Provide a non-blocking SetVariable() operation
x86/efi: Adding efi_printks on memory allocationa and pci.reads
x86/efi: Mark initialization code as such
x86/efi: Update comment regarding required phys mapped EFI services
x86/efi: Unexport add_efi_memmap variable
x86/efi: Remove unused efi_call* macros
efi: Resolve some shadow warnings
arm64: efi: Format EFI memory type & attrs with efi_md_typeattr_format()
ia64: efi: Format EFI memory type & attrs with efi_md_typeattr_format()
x86: efi: Format EFI memory type & attrs with efi_md_typeattr_format()
efi: Introduce efi_md_typeattr_format()
efi: Add macro for EFI_MEMORY_UCE memory attribute
x86/efi: Clear EFI_RUNTIME_SERVICES if failing to enter virtual mode
arm64/efi: Do not enter virtual mode if booting with efi=noruntime or noefi
arm64/efi: uefi_init error handling fix
efi: Add kernel param efi=noruntime
lib: Add a generic cmdline parse function parse_option_str
...
* pm-cpuidle:
cpuidle: powernv: Populate cpuidle state details by querying the device-tree
* pm-cpufreq:
intel_pstate: Correct BYT VID values.
intel_pstate: Fix BYT frequency reporting
intel_pstate: Don't lose sysfs settings during cpu offline
cpufreq: intel_pstate: Reflect current no_turbo state correctly
cpufreq: expose scaling_cur_freq sysfs file for set_policy() drivers
cpufreq: intel_pstate: Fix setting max_perf_pct in performance policy
cpufreq: cpufreq-dt: adjust message related to regulators
cpufreq: cpufreq-dt: extend with platform_data
cpufreq: allow driver-specific data
For the following interfaces:
set_swbp()
set_orig_insn()
is_swbp_insn()
is_trap_insn()
uprobe_get_swbp_addr()
arch_uprobe_ignore()
arch_uprobe_copy_ixol()
kernel/events/uprobes.c provides default definitions explicitly marked
"weak". Some architectures provide their own definitions intended to
override the defaults, but the "weak" attribute on the declarations applied
to the arch definitions as well, so the linker chose one based on link
order (see 10629d711e ("PCI: Remove __weak annotation from
pcibios_get_phb_of_node decl")).
Remove the "weak" attribute from the declarations so we always prefer a
non-weak definition over the weak one, independent of link order.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
CC: Victor Kamensky <victor.kamensky@linaro.org>
CC: Oleg Nesterov <oleg@redhat.com>
CC: David A. Long <dave.long@linaro.org>
CC: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
drivers/base/memory.c provides a default memory_block_size_bytes()
definition explicitly marked "weak". Several architectures provide their
own definitions intended to override the default, but the "weak" attribute
on the declaration applied to the arch definitions as well, so the linker
chose one based on link order (see 10629d711e ("PCI: Remove __weak
annotation from pcibios_get_phb_of_node decl")).
Remove the "weak" attribute from the declaration so we always prefer a
non-weak definition over the weak one, independent of link order.
Fixes: 41f107266b ("drivers: base: Add prototype declaration to the header file")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
CC: Rashika Kheria <rashika.kheria@gmail.com>
CC: Nathan Fontenot <nfont@austin.ibm.com>
CC: Anton Blanchard <anton@au1.ibm.com>
CC: Heiko Carstens <heiko.carstens@de.ibm.com>
CC: Yinghai Lu <yinghai@kernel.org>
kernel/debug/debug_core.c provides a default kgdb_arch_pc() definition
explicitly marked "weak". Several architectures provide their own
definitions intended to override the default, but the "weak" attribute on
the declaration applied to the arch definitions as well, so the linker
chose one based on link order (see 10629d711e ("PCI: Remove __weak
annotation from pcibios_get_phb_of_node decl")).
Remove the "weak" attribute from the declaration so we always prefer a
non-weak definition over the weak one, independent of link order.
Fixes: 688b744d8b ("kgdb: fix signedness mixmatches, add statics, add declaration to header")
Tested-by: Vineet Gupta <vgupta@synopsys.com> # for ARC build
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Harvey Harrison <harvey.harrison@gmail.com>
For the following functions:
elfcorehdr_alloc()
elfcorehdr_free()
elfcorehdr_read()
elfcorehdr_read_notes()
remap_oldmem_pfn_range()
fs/proc/vmcore.c provides default definitions explicitly marked "weak".
arch/s390 provides its own definitions intended to override the default
ones, but the "weak" attribute on the declarations applied to the s390
definitions as well, so the linker chose one based on link order (see
10629d711e ("PCI: Remove __weak annotation from pcibios_get_phb_of_node
decl")).
Remove the "weak" attribute from the declarations so we always prefer a
non-weak definition over the weak one, independent of link order.
Fixes: be8a8d069e ("vmcore: introduce ELF header in new memory feature")
Fixes: 9cb218131d ("vmcore: introduce remap_oldmem_pfn_range()")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
CC: Michael Holzheu <holzheu@linux.vnet.ibm.com>
kernel/time/jiffies.c provides a default clocksource_default_clock()
definition explicitly marked "weak". arch/s390 provides its own definition
intended to override the default, but the "weak" attribute on the
declaration applied to the s390 definition as well, so the linker chose one
based on link order (see 10629d711e ("PCI: Remove __weak annotation from
pcibios_get_phb_of_node decl")).
Remove the "weak" attribute from the clocksource_default_clock()
declaration so we always prefer a non-weak definition over the weak one,
independent of link order.
Fixes: f1b82746c1 ("clocksource: Cleanup clocksource selection")
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
CC: Daniel Lezcano <daniel.lezcano@linaro.org>
CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
There's only one audit_classify_compat_syscall() definition, so it doesn't
need to be weak.
Remove the "weak" attribute from the audit_classify_compat_syscall()
declaration.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Richard Guy Briggs <rgb@redhat.com>
CC: AKASHI Takahiro <takahiro.akashi@linaro.org>
PM freezer relies on having all tasks frozen by the time devices are
getting frozen so that no task will touch them while they are getting
frozen. But OOM killer is allowed to kill an already frozen task in
order to handle OOM situtation. In order to protect from late wake ups
OOM killer is disabled after all tasks are frozen. This, however, still
keeps a window open when a killed task didn't manage to die by the time
freeze_processes finishes.
Reduce the race window by checking all tasks after OOM killer has been
disabled. This is still not race free completely unfortunately because
oom_killer_disable cannot stop an already ongoing OOM killer so a task
might still wake up from the fridge and get killed without
freeze_processes noticing. Full synchronization of OOM and freezer is,
however, too heavy weight for this highly unlikely case.
Introduce and check oom_kills counter which gets incremented early when
the allocator enters __alloc_pages_may_oom path and only check all the
tasks if the counter changes during the freezing attempt. The counter
is updated so early to reduce the race window since allocator checked
oom_killer_disabled which is set by PM-freezing code. A false positive
will push the PM-freezer into a slow path but that is not a big deal.
Changes since v1
- push the re-check loop out of freeze_processes into
check_frozen_processes and invert the condition to make the code more
readable as per Rafael
Fixes: f660daac47 (oom: thaw threads if oom killed thread is frozen before deferring)
Cc: 3.2+ <stable@vger.kernel.org> # 3.2+
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Pull SCSI target updates from Nicholas Bellinger:
"Here are the target updates for v3.18-rc2 code. These where
originally destined for -rc1, but due to the combination of travel
last week for KVM Forum and my mistake of taking the three week merge
window literally, the pull request slipped.. Apologies for that.
Things where reasonably quiet this round. The highlights include:
- New userspace backend driver (target_core_user.ko) by Shaohua Li
and Andy Grover
- A number of cleanups in target, iscsi-taret and qla_target code
from Joern Engel
- Fix an OOPs related to queue full handling with CHECK_CONDITION
status from Quinn Tran
- Fix to disable TX completion interrupt coalescing in iser-target,
that was causing problems on some hardware
- Fix for PR APTPL metadata handling with demo-mode ACLs
I'm most excited about the new backend driver that uses UIO + shared
memory ring to dispatch I/O and control commands into user-space.
This was probably the most requested feature by users over the last
couple of years, and opens up a new area of development + porting of
existing user-space storage applications to LIO. Thanks to Shaohua +
Andy for making this happen.
Also another honorable mention, a new Xen PV SCSI driver was merged
via the xen/tip.git tree recently, which puts us now at 10 target
drivers in upstream! Thanks to David Vrabel + Juergen Gross for their
work to get this code merged"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (40 commits)
target/file: fix inclusive vfs_fsync_range() end
iser-target: Disable TX completion interrupt coalescing
target: Add force_pr_aptpl device attribute
target: Fix APTPL metadata handling for dynamic MappedLUNs
qla_target: don't delete changed nacls
target/user: Recalculate pad size inside is_ring_space_avail()
tcm_loop: Fixup tag handling
iser-target: Fix smatch warning
target/user: Fix up smatch warnings in tcmu_netlink_event
target: Add a user-passthrough backstore
target: Add documentation on the target userspace pass-through driver
uio: Export definition of struct uio_device
target: Remove unneeded check in sbc_parse_cdb
target: Fix queue full status NULL pointer for SCF_TRANSPORT_TASK_SENSE
qla_target: rearrange struct qla_tgt_prm
qla_target: improve qlt_unmap_sg()
qla_target: make some global functions static
qla_target: remove unused parameter
target: simplify core_tmr_abort_task
target: encapsulate smp_mb__after_atomic()
...
Pull mailbox framework from Jassi Brar:
"A framework for Mailbox controllers and clients have been cooking for
more than a year now.
Everybody in the CC list had been copied on patchset revisions and
most of them have made sounds of approval, though just one concrete
Reviewed-by. The patchset has also been in linux-next for a couple of
weeks now and no conflict has been reported. The framework has the
backing of at least 5 platforms, though I can't say if/when they
upstream their drivers (some businesses have 'changed')"
(Further acked-by by Arnd Bergmann and Suman Anna in the pull request
thread)
* 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
dt: mailbox: add generic bindings
doc: add documentation for mailbox framework
mailbox: Introduce framework for mailbox
mailbox: rename pl320-ipc specific mailbox.h
Pull LED update from Bryan Wu:
"Basically we have some bug fixing and clean up and one big thing is we
start to merge patch to add support LED Flash class"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: gpio: cleanup the leds-gpio driver
led: gpio: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
led: gpio: Sort include headers alphabetically
leds: Improve and export led_update_brightness
leds: trigger: gpio: fix warning in gpio trigger for gpios whose accessor function may sleep
leds: lp3944: fix sparse warning
leds: avoid using DEVICE_ATTR macro for max_brightness attribute
leds: make brightness type consistent across whole subsystem
leds: Reorder include directives
This commit extends the cpufreq-dt driver to take a platform_data
structure. This structure is for now used to tell the cpufreq-dt
driver the layout of the clocks on the platform, i.e whether all CPUs
share the same clock or whether each CPU has a separate clock.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit extends the cpufreq_driver structure with an additional
'void *driver_data' field that can be filled by the ->probe() function
of a cpufreq driver to pass additional custom information to the
driver itself.
A new function called cpufreq_get_driver_data() is added to allow a
cpufreq driver to retrieve those driver data, since they are typically
needed from a cpufreq_policy->init() callback, which does not have
access to the cpufreq_driver structure. This function call is similar
to the existing cpufreq_get_current_driver() function call.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Version 20140926.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This patch is partial linuxized result of the following ACPICA commit:
ACPICA commit: a73b66c6aa1846d055bb6390d9c9b9902f7d804d
Subject: Add "has handler" flag to event/gpe status interfaces.
This change adds a new flag, ACPI_EVENT_FLAGS_HAS_HANDLER to the
acpi_get_event_status and acpi_get_gpe_status external interfaces. It
is set if the event/gpe currently has a handler associated with it.
This patch contains the code to rename ACPI_EVENT_FLAG_HANDLE to
ACPI_EVENT_FLAG_HAS_HANDLER, and the corresponding updates of its usages.
Link: https://github.com/acpica/acpica/commit/a73b66c6
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This patch is a partial linuxized result of the following ACPICA commit:
ACPICA commit: a73b66c6aa1846d055bb6390d9c9b9902f7d804d
Subject: Add "has handler" flag to event/gpe status interfaces.
This change adds a new flag, ACPI_EVENT_FLAGS_HAS_HANDLER to the
acpi_get_event_status and acpi_get_gpe_status external interfaces. It
is set if the event/gpe currently has a handler associated with it.
This commit back ports ACPI_EVENT_FLAG_HANDLE from Linux upstream to
ACPICA, the flag along with its support code currently can only be found
in the Linux upstream and is used by the ACPI sysfs GPE interfaces and
the ACPI bus scanning support.
Link: https://github.com/acpica/acpica/commit/a73b66c6
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The _DDN method will be used internally.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
optimizations.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o:
"A large number of cleanups and bug fixes, with some (minor) journal
optimizations"
[ This got sent to me before -rc1, but was stuck in my spam folder. - Linus ]
* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (67 commits)
ext4: check s_chksum_driver when looking for bg csum presence
ext4: move error report out of atomic context in ext4_init_block_bitmap()
ext4: Replace open coded mdata csum feature to helper function
ext4: delete useless comments about ext4_move_extents
ext4: fix reservation overflow in ext4_da_write_begin
ext4: add ext4_iget_normal() which is to be used for dir tree lookups
ext4: don't orphan or truncate the boot loader inode
ext4: grab missed write_count for EXT4_IOC_SWAP_BOOT
ext4: optimize block allocation on grow indepth
ext4: get rid of code duplication
ext4: fix over-defensive complaint after journal abort
ext4: fix return value of ext4_do_update_inode
ext4: fix mmap data corruption when blocksize < pagesize
vfs: fix data corruption when blocksize < pagesize for mmaped data
ext4: fold ext4_nojournal_sops into ext4_sops
ext4: support freezing ext2 (nojournal) file systems
ext4: fold ext4_sync_fs_nojournal() into ext4_sync_fs()
ext4: don't check quota format when there are no quota files
jbd2: simplify calling convention around __jbd2_journal_clean_checkpoint_list
jbd2: avoid pointless scanning of checkpoint lists
...
Pull audit updates from Eric Paris:
"So this change across a whole bunch of arches really solves one basic
problem. We want to audit when seccomp is killing a process. seccomp
hooks in before the audit syscall entry code. audit_syscall_entry
took as an argument the arch of the given syscall. Since the arch is
part of what makes a syscall number meaningful it's an important part
of the record, but it isn't available when seccomp shoots the
syscall...
For most arch's we have a better way to get the arch (syscall_get_arch)
So the solution was two fold: Implement syscall_get_arch() everywhere
there is audit which didn't have it. Use syscall_get_arch() in the
seccomp audit code. Having syscall_get_arch() everywhere meant it was
a useless flag on the stack and we could get rid of it for the typical
syscall entry.
The other changes inside the audit system aren't grand, fixed some
records that had invalid spaces. Better locking around the task comm
field. Removing some dead functions and structs. Make some things
static. Really minor stuff"
* git://git.infradead.org/users/eparis/audit: (31 commits)
audit: rename audit_log_remove_rule to disambiguate for trees
audit: cull redundancy in audit_rule_change
audit: WARN if audit_rule_change called illegally
audit: put rule existence check in canonical order
next: openrisc: Fix build
audit: get comm using lock to avoid race in string printing
audit: remove open_arg() function that is never used
audit: correct AUDIT_GET_FEATURE return message type
audit: set nlmsg_len for multicast messages.
audit: use union for audit_field values since they are mutually exclusive
audit: invalid op= values for rules
audit: use atomic_t to simplify audit_serial()
kernel/audit.c: use ARRAY_SIZE instead of sizeof/sizeof[0]
audit: reduce scope of audit_log_fcaps
audit: reduce scope of audit_net_id
audit: arm64: Remove the audit arch argument to audit_syscall_entry
arm64: audit: Add audit hook in syscall_trace_enter/exit()
audit: x86: drop arch from __audit_syscall_entry() interface
sparc: implement is_32bit_task
sparc: properly conditionalize use of TIF_32BIT
...
Pull i2c updates from Wolfram Sang:
"Highlights from the I2C subsystem for 3.18:
- new drivers for Axxia AM55xx, and Hisilicon hix5hd2 SoC.
- designware driver gained AMD support, exynos gained exynos7 support
The rest is usual driver stuff. Hopefully no lowlights this time"
* 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: i801: Add Device IDs for Intel Sunrise Point PCH
i2c: hix5hd2: add i2c controller driver
i2c-imx: Disable the clock on probe failure
i2c: designware: Add support for AMD I2C controller
i2c: designware: Rework probe() to get clock a bit later
i2c: designware: Default to fast mode in case of ACPI
i2c: axxia: Add I2C driver for AXM55xx
i2c: exynos: add support for HSI2C module on Exynos7
i2c: mxs: detect No Slave Ack on SELECT in PIO mode
i2c: cros_ec: Remove EC_I2C_FLAG_10BIT
i2c: cros-ec-tunnel: Add of match table
i2c: rcar: remove sign-compare flaw
i2c: ismt: Use minimum descriptor size
i2c: imx: Add arbitration lost check
i2c: rk3x: Remove unlikely() annotations
i2c: rcar: check for no IRQ in rcar_i2c_irq()
i2c: rcar: make rcar_i2c_prepare_msg() *void*
i2c: rcar: simplify check for last message
i2c: designware: add support of platform data to set I2C mode
i2c: designware: add support of I2C standard mode
- Large set of iSER initiator improvements
- Hardware driver fixes for cxgb4, mlx5 and ocrdma
- Small fixes to core midlayer
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
Pull infiniband/RDMA updates from Roland Dreier:
- large set of iSER initiator improvements
- hardware driver fixes for cxgb4, mlx5 and ocrdma
- small fixes to core midlayer
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (47 commits)
RDMA/cxgb4: Fix ntuple calculation for ipv6 and remove duplicate line
RDMA/cxgb4: Add missing neigh_release in find_route
RDMA/cxgb4: Take IPv6 into account for best_mtu and set_emss
RDMA/cxgb4: Make c4iw_wr_log_size_order static
IB/core: Fix XRC race condition in ib_uverbs_open_qp
IB/core: Clear AH attr variable to prevent garbage data
RDMA/ocrdma: Save the bit environment, spare unncessary parenthesis
RDMA/ocrdma: The kernel has a perfectly good BIT() macro - use it
RDMA/ocrdma: Don't memset() buffers we just allocated with kzalloc()
RDMA/ocrdma: Remove a unused-label warning
RDMA/ocrdma: Convert kernel VA to PA for mmap in user
RDMA/ocrdma: Get vlan tag from ib_qp_attrs
RDMA/ocrdma: Add default GID at index 0
IB/mlx5, iser, isert: Add Signature API additions
Target/iser: Centralize ib_sig_domain setting
IB/iser: Centralize ib_sig_domain settings
IB/mlx5: Use extended internal signature layout
IB/iser: Set IP_CSUM as default guard type
IB/iser: Remove redundant assignment
IB/mlx5: Use enumerations for PI copy mask
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