If the device data is not accessible for some reason, returning 0 will cause the call to be
continuously called again as none of the string has been 'consumed'.
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
The khwrngd thread is started when a hwrng device of sufficient
quality is registered. The virtio-rng device is backed by the
hypervisor, and we trust the hypervisor to provide real entropy.
A malicious or badly-implemented hypervisor is a scenario that's
irrelevant -- such a setup is bound to cause all sorts of badness, and a
compromised hwrng is the least of the user's worries.
Given this, we might as well assume that the quality of randomness we
receive is perfectly trustworthy. Hence, we use 100% for the factor,
indicating maximum confidence in the source.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: H. Peter Anvin <hpa@linux.intel.com>
Reviewed-by: Amos Kong <akong@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
- Fix for an ACPI-based device hotplug regression introduced in 3.14
that causes a kernel panic to trigger when memory hot-remove is
attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen.
- Fix for a cpufreq regression introduced in 3.16 that triggers a
"sleeping function called from invalid context" bug in
dev_pm_opp_init_cpufreq_table() from Stephen Boyd.
- ACPI battery driver fix for a warning message added in 3.16 that
prints silly stuff sometimes from Mariusz Ceier.
- Hibernation fix for safer handling of mismatches in the 820 memory
map between the configurations during image creation and during
the subsequent restore from Chun-Yi Lee.
- ACPI processor driver fix to handle CPU hotplug notifications
correctly during system suspend/resume from Lan Tianyu.
- Series of four cpuidle menu governor cleanups that also should
speed it up a bit from Mel Gorman.
- Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little
cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus Pargmann
and Uwe Kleine-König.
- Version 3.0 of the analyze_suspend.py suspend profiling tool
from Todd E Brandt.
/
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Merge tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI and power management updates from Rafael Wysocki:
"These are a couple of regression fixes, cpuidle menu governor
optimizations, fixes for ACPI proccessor and battery drivers,
hibernation fix to avoid problems related to the e820 memory map,
fixes for a few cpufreq drivers and a new version of the suspend
profiling tool analyze_suspend.py.
Specifics:
- Fix for an ACPI-based device hotplug regression introduced in 3.14
that causes a kernel panic to trigger when memory hot-remove is
attempted with CONFIG_ACPI_HOTPLUG_MEMORY unset from Tang Chen
- Fix for a cpufreq regression introduced in 3.16 that triggers a
"sleeping function called from invalid context" bug in
dev_pm_opp_init_cpufreq_table() from Stephen Boyd
- ACPI battery driver fix for a warning message added in 3.16 that
prints silly stuff sometimes from Mariusz Ceier
- Hibernation fix for safer handling of mismatches in the 820 memory
map between the configurations during image creation and during the
subsequent restore from Chun-Yi Lee
- ACPI processor driver fix to handle CPU hotplug notifications
correctly during system suspend/resume from Lan Tianyu
- Series of four cpuidle menu governor cleanups that also should
speed it up a bit from Mel Gorman
- Fixes for the speedstep-smi, integrator, cpu0 and arm_big_little
cpufreq drivers from Hans Wennborg, Himangi Saraogi, Markus
Pargmann and Uwe Kleine-König
- Version 3.0 of the analyze_suspend.py suspend profiling tool from
Todd E Brandt"
* tag 'pm+acpi-3.17-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / battery: Fix warning message in acpi_battery_get_state()
PM / tools: analyze_suspend.py: update to v3.0
cpufreq: arm_big_little: fix module license spec
cpufreq: speedstep-smi: fix decimal printf specifiers
ACPI / hotplug: Check scan handlers in acpi_scan_hot_remove()
cpufreq: OPP: Avoid sleeping while atomic
cpufreq: cpu0: Do not print error message when deferring
cpufreq: integrator: Use set_cpus_allowed_ptr
PM / hibernate: avoid unsafe pages in e820 reserved regions
ACPI / processor: Make acpi_cpu_soft_notify() process CPU FROZEN events
cpuidle: menu: Lookup CPU runqueues less
cpuidle: menu: Call nr_iowait_cpu less times
cpuidle: menu: Use ktime_to_us instead of reinventing the wheel
cpuidle: menu: Use shifts when calculating averages where possible
Miscellaneous
- Remove DEFINE_PCI_DEVICE_TABLE macro use (Benoit Taine)
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Merge tag 'pci-v3.17-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull DEFINE_PCI_DEVICE_TABLE removal from Bjorn Helgaas:
"Part two of the PCI changes for v3.17:
- Remove DEFINE_PCI_DEVICE_TABLE macro use (Benoit Taine)
It's a mechanical change that removes uses of the
DEFINE_PCI_DEVICE_TABLE macro. I waited until later in the merge
window to reduce conflicts, but it's possible you'll still see a few"
* tag 'pci-v3.17-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use
Commit 21d70354bb ("drm: move drm_stub.c to drm_drv.c") moves the code
from drm_stub.c into drm_drv.c. Update DocBook to include that instead.
This also came in via other people, but all the same.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
A couple of thinkos from the -next merge, some random fixes from a
coverity scan, fix for (at least) GK106 accidentally using
non-existent vram on some board configurations, and better behaviour
of the instmem allocations if vmalloc space runs out.
* 'linux-3.17' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/nouveau/platform: fix compilation error
drm/nouveau/gk20a: add LTC device
drm/nouveau: warn if we fail to re-pin fb on resume
drm/nouveau/nvif: fix dac load detect method definition
drm/gf100-/gr: fix -ENOSPC detection when allocating zbc table entries
drm/nouveau/nvif: return null pointers on failure, in addition to ret != 0
drm/nouveau/ltc: fix tag base address getting truncated if above 4GiB
drm/nvc0-/fb/ram: fix use of non-existant ram if partitions aren't uniform
drm/nouveau/bar: behave better if ioremap failed
drm/nouveau/kms: nouveau_fbcon_accel_fini can be static
drm/nouveau: kill unused variable warning if !__OS_HAS_AGP
drm/nouveau/nvif: fix a number of notify thinkos
Pull Sparc fixes from David Miller:
"Hook up the memfd syscall, and properly claim all PCI resources
discovered when building the PCI device tree"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Hook up memfd_create system call.
sparc64: Properly claim resources as each PCI bus is probed.
sparc64: Skip bogus PCI bridge ranges.
sparc64: Expand PCI bridge probing debug logging.
Pull networking fixes from David Miller:
"I'm sending this out, in particular, to get the iwlwifi fix
propagated:
1) Fix build due to missing include in i40e driver, from Lucas
Tanure.
2) Memory leak in openvswitch port allocation, from Chirstoph Jaeger.
3) Check DMA mapping errors in myri10ge, from Stanislaw Gruszka.
4) Fix various deadlock scenerios in sunvnet driver, from Sowmini
Varadhan.
5) Fix cxgb4i build failures with incompatible Kconfig settings of
the driver vs ipv6, from Anish Bhatt.
6) Fix generation of ACK packet timestamps in the presence of TSO
which will be split up, from Willem de Bruijn.
7) Don't enable sched scan in iwlwifi driver, it causes firmware
crashes in some revisions. From Emmanuel Grumbach.
8) Revert a macvlan simplification that causes crashes.
9) Handle RTT calculations properly in the presence of repair'd SKBs,
from Andrey Vagin.
10) SIT tunnel lookup uses wrong device index in compares, from
Shmulik Ladkani.
11) Handle MTU reductions in TCP properly for ipv4 mapped ipv6
sockets, from Neal Cardwell.
12) Add missing annotations in rhashtable code, from Thomas Graf.
13) Fix false interpretation of two RTOs as being from the same TCP
loss event in the FRTO code, from Neal Cardwell"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (42 commits)
netlink: Annotate RCU locking for seq_file walker
rhashtable: fix annotations for rht_for_each_entry_rcu()
rhashtable: unexport and make rht_obj() static
rhashtable: RCU annotations for next pointers
tcp: fix ssthresh and undo for consecutive short FRTO episodes
tcp: don't allow syn packets without timestamps to pass tcp_tw_recycle logic
tcp: fix tcp_release_cb() to dispatch via address family for mtu_reduced()
sit: Fix ipip6_tunnel_lookup device matching criteria
net: ethernet: ibm: ehea: Remove duplicate object from Makefile
net: xgene: Check negative return value of xgene_enet_get_ring_size()
tcp: don't use timestamp from repaired skb-s to calculate RTT (v2)
net: xilinx: Remove .owner field for driver
Revert "macvlan: simplify the structure port"
iwlwifi: mvm: disable scheduled scan to prevent firmware crash
xen-netback: remove loop waiting function
xen-netback: don't stop dealloc kthread too early
xen-netback: move NAPI add/remove calls
xen-netback: fix debugfs entry creation
xen-netback: fix debugfs write length check
net-timestamp: fix missing tcp fragmentation cases
...
John W. Linville says:
====================
pull request: wireless 2014-08-14
Please pull this batch of fixes intended for the 3.17 stream...
Arend van Spriel brings two brcmfmac fixes, one which fixes a memory
leak and one which corrects some merge damage.
Emmanuel Grumbach fixes Linus's iwlwifi firmware-related log spam.
Rickard Strandqvist does some proper NULL termination after a call
to strncpy.
Ronald Wahl corrects a carl9170 problem with sending URBs with the
wrong endpoint type (resulting in log spam).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Silences the following sparse warnings:
net/netlink/af_netlink.c:2926:21: warning: context imbalance in 'netlink_seq_start' - wrong count at exit
net/netlink/af_netlink.c:2972:13: warning: context imbalance in 'netlink_seq_stop' - unexpected unlock
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Call rcu_deference_raw() directly from within rht_for_each_entry_rcu()
as list_for_each_entry_rcu() does.
Fixes the following sparse warnings:
net/netlink/af_netlink.c:2906:25: expected struct rhash_head const *__mptr
net/netlink/af_netlink.c:2906:25: got struct rhash_head [noderef] <asn:4>*<noident>
Fixes: e341694e3e ("netlink: Convert netlink_lookup() to use RCU protected hash table")
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
No need to export rht_obj(), all inner to outer object translations
occur internally. It was intended to be used with rht_for_each() which
now primarily serves as the iterator for rhashtable_remove_pprev() to
effectively flush and free the full table.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Properly annotate next pointers as access is RCU protected in
the lookup path.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
nouveau_platform.c was still using the old nouveau_dev() macro,
triggering a compilation error. Fix this.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
LTC device is now required for PGRAPH to work, add it.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reported by Coverity. The intention is that the return value is
checked, but let's be more paranoid and make it extremely obvious
if something forgets to.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Fix TCP FRTO logic so that it always notices when snd_una advances,
indicating that any RTO after that point will be a new and distinct
loss episode.
Previously there was a very specific sequence that could cause FRTO to
fail to notice a new loss episode had started:
(1) RTO timer fires, enter FRTO and retransmit packet 1 in write queue
(2) receiver ACKs packet 1
(3) FRTO sends 2 more packets
(4) RTO timer fires again (should start a new loss episode)
The problem was in step (3) above, where tcp_process_loss() returned
early (in the spot marked "Step 2.b"), so that it never got to the
logic to clear icsk_retransmits. Thus icsk_retransmits stayed
non-zero. Thus in step (4) tcp_enter_loss() would see the non-zero
icsk_retransmits, decide that this RTO is not a new episode, and
decide not to cut ssthresh and remember the current cwnd and ssthresh
for undo.
There were two main consequences to the bug that we have
observed. First, ssthresh was not decreased in step (4). Second, when
there was a series of such FRTO (1-4) sequences that happened to be
followed by an FRTO undo, we would restore the cwnd and ssthresh from
before the entire series started (instead of the cwnd and ssthresh
from before the most recent RTO). This could result in cwnd and
ssthresh being restored to values much bigger than the proper values.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Fixes: e33099f96d ("tcp: implement RFC5682 F-RTO")
Signed-off-by: David S. Miller <davem@davemloft.net>
tcp_tw_recycle heavily relies on tcp timestamps to build a per-host
ordering of incoming connections and teardowns without the need to
hold state on a specific quadruple for TCP_TIMEWAIT_LEN, but only for
the last measured RTO. To do so, we keep the last seen timestamp in a
per-host indexed data structure and verify if the incoming timestamp
in a connection request is strictly greater than the saved one during
last connection teardown. Thus we can verify later on that no old data
packets will be accepted by the new connection.
During moving a socket to time-wait state we already verify if timestamps
where seen on a connection. Only if that was the case we let the
time-wait socket expire after the RTO, otherwise normal TCP_TIMEWAIT_LEN
will be used. But we don't verify this on incoming SYN packets. If a
connection teardown was less than TCP_PAWS_MSL seconds in the past we
cannot guarantee to not accept data packets from an old connection if
no timestamps are present. We should drop this SYN packet. This patch
closes this loophole.
Please note, this patch does not make tcp_tw_recycle in any way more
usable but only adds another safety check:
Sporadic drops of SYN packets because of reordering in the network or
in the socket backlog queues can happen. Users behing NAT trying to
connect to a tcp_tw_recycle enabled server can get caught in blackholes
and their connection requests may regullary get dropped because hosts
behind an address translator don't have synchronized tcp timestamp clocks.
tcp_tw_recycle cannot work if peers don't have tcp timestamps enabled.
In general, use of tcp_tw_recycle is disadvised.
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make sure we use the correct address-family-specific function for
handling MTU reductions from within tcp_release_cb().
Previously AF_INET6 sockets were incorrectly always using the IPv6
code path when sometimes they were handling IPv4 traffic and thus had
an IPv4 dst.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Diagnosed-by: Willem de Bruijn <willemb@google.com>
Fixes: 563d34d057 ("tcp: dont drop MTU reduction indications")
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
As of 4fddbf5d78 ("sit: strictly restrict incoming traffic to tunnel link device"),
when looking up a tunnel, tunnel's underlying interface (t->parms.link)
is verified to match incoming traffic's ingress device.
However the comparison was incorrectly based on skb->dev->iflink.
Instead, dev->ifindex should be used, which correctly represents the
interface from which the IP stack hands the ipip6 packets.
This allows setting up sit tunnels bound to vlan interfaces (otherwise
incoming ipip6 traffic on the vlan interface was dropped due to
ipip6_tunnel_lookup match failure).
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In the Makefile, ehea_phyp.o is included twice in the list of
object files compile into ehea.o.
This change removes one instance.
Signed-off-by: Andreas Ruprecht <rupran@einserver.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
xgene_enet_get_ring_size() returns a negative value in case of an error,
but its only caller in xgene_enet_create_desc_ring() currently uses the
return value directly as u32. Instead, check for a negative value first and
error out in case. Also move the call to xgene_enet_get_ring_size() before
devm_kzalloc() so we don't need to free anything in the error path.
This fixes the following issue reported by the Coverity Scanner:
** CID 1231336: Improper use of negative value (NEGATIVE_RETURNS)
/drivers/net/ethernet/apm/xgene/xgene_enet_main.c: 596 in xgene_enet_create_desc_ring()
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need to init .owner field.
Based on the patch from Peter Griffin <peter.griffin@linaro.org>
"mmc: remove .owner field for drivers using module_platform_driver"
This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway."
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull misc kbuild updates from Michal Marek:
"This is the non-critical part of kbuild for 3.17-rc1:
- make help hint to use make -s with make kernelrelease et al.
- moved a kbuild document to Documentation/kbuild where it belongs
- four new Coccinelle scripts, one dropped and one fixed
- new make kselftest target to run various tests on the kernel"
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kbuild: kselftest - new make target to build and run kernel selftests
Coccinelle: Script to replace if and BUG with BUG_ON
Coccinelle: Script to detect incorrect argument to sizeof
Coccinelle: Script to use ARRAY_SIZE instead of division of two sizeofs
Coccinelle: Script to detect cast after memory allocation
coccinelle/null: solve parse error
Documentation: headers_install.txt is part of kbuild
kbuild: make -s should be used with kernelrelease/kernelversion/image_name
Pull kbuild updates from Michal Marek:
- make clean also considers $(extra-m) and $(extra-) to be consistent
- cleanup and fixes in scripts/Makefile.host
- allow to override the name of the Python 2 executable with make
PYTHON=... (only needed for ia64 in practice)
- option to split debugingo into *.dwo files to save disk space if the
compiler supports it (CONFIG_DEBUG_INFO_SPLIT)
- option to use dwarf4 debuginfo if the compiler supports it
(CONFIG_DEBUG_INFO_DWARF4)
- fix for disabling certain warnings with clang
- fix for unneeded rebuild with dash when a command contains
backslashes
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kbuild: Fix handling of backslashes in *.cmd files
kbuild, LLVMLinux: Supress warnings unless W=1-3
Kbuild: Add a option to enable dwarf4 v2
kbuild: Support split debug info v4
kbuild: allow to override Python command name
kbuild: clean-up and bug fix of scripts/Makefile.host
kbuild: clean up scripts/Makefile.host
kbuild: drop shared library support from Makefile.host
kbuild: fix a bug of C++ host program handling
kbuild: fix a typo in scripts/Makefile.host
scripts/Makefile.clean: clean also $(extra-m) and $(extra-)
- MR reregistration support
- MAD support for RMPP in userspace
- iSER and SRP initiator updates
- ocrdma hardware driver updates
- other fixes...
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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:
"Main set of InfiniBand/RDMA updates for 3.17 merge window:
- MR reregistration support
- MAD support for RMPP in userspace
- iSER and SRP initiator updates
- ocrdma hardware driver updates
- other fixes..."
* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (52 commits)
IB/srp: Fix return value check in srp_init_module()
RDMA/ocrdma: report asic-id in query device
RDMA/ocrdma: Update sli data structure for endianness
RDMA/ocrdma: Obtain SL from device structure
RDMA/uapi: Include socket.h in rdma_user_cm.h
IB/srpt: Handle GID change events
IB/mlx5: Use ARRAY_SIZE instead of sizeof/sizeof[0]
IB/mlx4: Use ARRAY_SIZE instead of sizeof/sizeof[0]
RDMA/amso1100: Check for integer overflow in c2_alloc_cq_buf()
IPoIB: Remove unnecessary test for NULL before debugfs_remove()
IB/mad: Add user space RMPP support
IB/mad: add new ioctl to ABI to support new registration options
IB/mad: Add dev_notice messages for various umad/mad registration failures
IB/mad: Update module to [pr|dev]_* style print messages
IB/ipoib: Avoid multicast join attempts with invalid P_key
IB/umad: Update module to [pr|dev]_* style print messages
IB/ipoib: Avoid flushing the workqueue from worker context
IB/ipoib: Use P_Key change event instead of P_Key polling mechanism
IB/ipath: Add P_Key change event support
mlx4_core: Add support for secure-host and SMP firewall
...
Benjamin Herrenschmidt pointed out that I further missed modifying
update_vsyscall after the wall_to_mono value was changed to a
timespec64. This causes issues on powerpc32, which expects a 32bit
timespec.
This patch fixes the problem by properly converting from a timespec64 to
a timespec before passing the value on to the arch-specific vsyscall
logic.
[ Thomas is currently on vacation, but reviewed it and wanted me to send
this fix on to you directly. ]
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge leftovers from Andrew Morton:
"A few leftovers.
I have a bunch of OCFS2 patches which are still out for review and
which I might sneak along after -rc1. Partly my fault - I should send
my review pokes out earlier"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm: fix CROSS_MEMORY_ATTACH help text grammar
drivers/mfd/rtsx_usb.c: export device table
mm, hugetlb_cgroup: align hugetlb cgroup limit to hugepage size
The rtsx_usb driver contains the table for the devices it supports but
doesn't export it. As a result, no alias is generated and it doesn't
get loaded automatically.
Via https://bugzilla.novell.com/show_bug.cgi?id=890096
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reported-by: Marcel Witte <wittemar@googlemail.com>
Cc: Roger Tseng <rogerable@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Memcg aligns memory.limit_in_bytes to PAGE_SIZE as part of the resource
counter since it makes no sense to allow a partial page to be charged.
As a result of the hugetlb cgroup using the resource counter, it is also
aligned to PAGE_SIZE but makes no sense unless aligned to the size of
the hugepage being limited.
Align hugetlb cgroup limit to hugepage size.
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are firmwares which don't support scheduled scan.
Disable it for now.
Linus's system encoutered this issue.
Thanks to David Spinadel for his help.
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Pull more powerpc updates from Ben Herrenschmidt:
"Here are some more powerpc bits for 3.17, essentially fixes.
The biggest series, also aimed at -stable, is from Aneesh and is the
result of weeks and weeks of debugging to find out why the heck or THP
implementation was occasionally triggering multi-hit errors in our
level 1 TLB. It ended up being a combination of issues including
subtleties as to how we should invalidate those special 'MPSS' pages
we use to allow the use of 16M pages inside 4K/64K "base page size"
segments (you really have to love our MMU !)
Another interesting one in the "OMG" category is the series from
Michael adding memory barriers to spin_is_locked(). That's also the
result of many days of debugging to figure out why the semaphore code
would occasionally crash in ways that made no sense. It ended up
being some creative lock stacking that was defeated by the fact that
our locks allow a load inside the locked section to be re-ordered with
the load of the lock value itself (I'm still of two mind about whether
to kill that once and for all by putting a heavier barrier back into
our lock implementation...). The fixes come with a long explanation
in the cset comments, feel free to read it if you feel like having a
headache today"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (25 commits)
powerpc/thp: Add tracepoints to track hugepage invalidate
powerpc/mm: Use read barrier when creating real_pte
powerpc/thp: Use ACCESS_ONCE when loading pmdp
powerpc/thp: Invalidate with vpn in loop
powerpc/thp: Handle combo pages in invalidate
powerpc/thp: Invalidate old 64K based hash page mapping before insert of 4k pte
powerpc/thp: Don't recompute vsid and ssize in loop on invalidate
powerpc/thp: Add write barrier after updating the valid bit
powerpc: reorder per-cpu NUMA information's initialization
powerpc/perf/hv-24x7: Use kmem_cache_free
powerpc/pseries/hvcserver: Fix endian issue in hvcs_get_partner_info
powerpc: Hard disable interrupts in xmon
powerpc: remove duplicate definition of TEXASR_FS
powerpc/pseries: Avoid deadlock on removing ddw
powerpc/pseries: Failure on removing device node
powerpc/boot: Use correct zlib types for comparison
powerpc/powernv: Interface to register/unregister opal dump region
printk: Add function to return log buffer address and size
powerpc: Add POWER8 features to CPU_FTRS_POSSIBLE/ALWAYS
powerpc/ppc476: Disable BTAC
...
Pull seccomp fix from James Morris.
BUG(!spin_is_locked()) really doesn't work very well in UP
configurations without any actual spinlock state. Which is very much
why we have that "assert_spin_lock()" function for this.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock
In case of error, the function create_workqueue() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
