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Some mmio devices have a dedicated interface clock that needs
to be enabled to access their registers. This patch optionally
enables a clock before accessing registers in the regmap_bus
callbacks.
I added (devm_)regmap_init_mmio_clk variants of the init
functions that have an added clk_id string parameter. This
is passed to clk_get to request the clock from the clk
framework.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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commit dd8004af: 'regulator: core: Log when a device causes a voltage
constraint fail', tried to print out some information about the
check consumer min/max uV fixup, however, it uses a garbage pointer
left over from list_for_each_entry leading to boot messages in the
form:
'[ 2.079890] <RANDOM ASCII>: Restricting voltage, 3735899821-4294967295uV'
Because it references regulator->dev, it could potentially read memory from
anywhere causing a panic.
This patch instead uses rdev and the updated min/max uV values.
Signed-off-by: Russ Dill <Russ.Dill@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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Linux 3.8-rc7
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Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
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Use the smpboot thread infrastructure. Mark the stopper thread
selfparking and park it after it has finished the take_cpu_down()
work.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Arjan van de Veen <arjan@infradead.org>
Cc: Paul Turner <pjt@google.com>
Cc: Richard Weinberger <rw@linutronix.de>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130131120741.686315164@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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To allow the stopper thread being managed by the smpboot thread
infrastructure separate out the task storage from the stopper data
structure.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Arjan van de Veen <arjan@infradead.org>
Cc: Paul Turner <pjt@google.com>
Cc: Richard Weinberger <rw@linutronix.de>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130131120741.626690384@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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The stop machine threads are still killed when a cpu goes offline. The
reason is that the thread is used to bring the cpu down, so it can't
be parked along with the other per cpu threads.
Allow a per cpu thread to be excluded from automatic parking, so it
can park itself once it's done
Add a create callback function as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Arjan van de Veen <arjan@infradead.org>
Cc: Paul Turner <pjt@google.com>
Cc: Richard Weinberger <rw@linutronix.de>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130131120741.553993267@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Signed-off-by: Thiago Farina <tfarina@chromium.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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omapdrm uses "select" in Kconfig to enable omapdss. This doesn't work
correctly, as "select" forces omapdss to be enabled in the config even
if it normally could not be enabled because of missing Kconfig
dependencies.
This causes a build break on ARM, when using allyesconfig:
drivers/video/omap2/dss/dss.c: In function 'dss_calc_clock_div':
drivers/video/omap2/dss/dss.c:572:20: error: 'CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK' undeclared (first use in this function)
drivers/video/omap2/dss/dss.c:572:20: note: each undeclared identifier is reported only once for each function it appears in
Instead of using select, this patch changes omapdrm to use "depend
on".
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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commit 195e672a76056478cc79f5c48343164c9237852e
OMAPDSS: DPI: Remove cpu_is_xxxx checks
made the mistake of assuming that cpu_is_omap34xx() is exclusive of
other cpu_is_* predicates whereas it includes cpu_is_omap3630().
So on an omap3630, code that was previously enabled by
if (cpu_is_omap34xx())
is now disabled as
dss_has_feature(FEAT_DPI_USES_VDDS_DSI)
fails.
So add FEAT_DPI_USES_VDDS_DSI to omap3630_dss_feat_list.
Cc: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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We should use "__u16" instead of "u16" in the user-space visable
header.
Cc: Vlad Yasevich <vyasevic@redhat.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It is a pen with 10 finger touch device.
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This patch adds support for the Cypress APA Smbus Trackpad type,
which uses a modified register map that fits within the
limitations of the smbus protocol.
Devices that use this protocol include:
CYTRA-116001-00 - Samsung Series 5 550 Chromebook trackpad
CYTRA-103002-00 - Acer C7 Chromebook trackpad
CYTRA-101003-00 - HP Pavilion 14 Chromebook trackpad
Signed-off-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Investigating the following gesture highlighted two slight implementation
errors with choosing which slots to report in which slot when multiple
contacts are present:
Action SGM AGM (MTB slot:Contact)
1. Touch contact 0 (0:0)
2. Touch contact 1 (0:0, 1:1)
3. Lift contact 0 (1:1)
4. Touch contacts 2,3 (0:2, 1:3)
In step 4, slot 1 was not being cleared first, which means the same
tracking ID was being used for reporting both the old contact 1 and the
new contact 3. This could result in "drumroll", where the old contact 1
would appear to suddenly jump to new finger 3 position.
Similarly, if contacts 2 & 3 are not detected at the same sample, step 4
is split into two:
Action SGM AGM (MTB slot:contact)
1. Touch contact 0 (0:0)
2. Touch contact 1 (0:0, 1:1)
3. Lift contact 0 (1:1)
4. Touch contact 2 (0:2, 1:1)
5. Touch contact 3 (0:2, 1:3)
In this case, there was also a bug. In step 4, when contact 1 moves from
SGM to AGM and contact 2 is first reported in SGM, slot 0 was actually
empty. So slot 0 can be used to report the new SGM (contact 0),
immediately. Since it was empty, contact 2 in slot 0 will get a new
tracking ID.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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When removing the !S390 dependency from drivers/input/Kconfig
a couple of drivers don't compile because they have a dependency
on GENERIC_HARDIRQS. So add the missing dependencies.
Fixes e.g. this one:
drivers/input/keyboard/lm8323.c: In function ‘lm8323_suspend’:
drivers/input/keyboard/lm8323.c:801:2: error: implicit declaration of function ‘irq_set_irq_wake’
[-Werror=implicit-function-declaration]
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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workqueue has moved away from global_cwqs to worker_pools and with the
scheduled custom worker pools, wforkqueues will be associated with
pools which don't have anything to do with CPUs. The workqueue code
went through significant amount of changes recently and mass renaming
isn't likely to hurt much additionally. Let's replace 'cpu' with
'pool' so that it reflects the current design.
* s/struct cpu_workqueue_struct/struct pool_workqueue/
* s/cpu_wq/pool_wq/
* s/cwq/pwq/
This patch is purely cosmetic.
Signed-off-by: Tejun Heo <tj@kernel.org>
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is_chained_work() was added before current_wq_worker() and implemented
its own ham-fisted way of finding out whether %current is a workqueue
worker - it iterates through all possible workers.
Drop the custom implementation and reimplement using
current_wq_worker().
Signed-off-by: Tejun Heo <tj@kernel.org>
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c9e7cf273f ("workqueue: move busy_hash from global_cwq to
worker_pool") incorrectly converted is_chained_work() to use
get_gcwq() inside for_each_gcwq_cpu() while removing get_gcwq().
As cwq might not exist for all possible workqueue CPUs, @cwq can be
NULL and the following cwq deferences can lead to oops.
Fix it by using for_each_cwq_cpu() instead, which is the better one to
use anyway as we only need to check pools that the wq is associated
with.
Signed-off-by: Tejun Heo <tj@kernel.org>
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There was a serious problem in samsung-laptop that its platform driver is
designed to run under BIOS and running under EFI can cause the machine to
become bricked or can cause Machine Check Exceptions.
Discussion about this problem:
https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
https://bugzilla.kernel.org/show_bug.cgi?id=47121
The patches to fix this problem:
efi: Make 'efi_enabled' a function to query EFI facilities
83e68189745ad931c2afd45d8ee3303929233e7f
samsung-laptop: Disable on EFI hardware
e0094244e41c4d0c7ad69920681972fc45d8ce34
Unfortunately this problem comes back again if users specify "noefi" option.
This parameter clears EFI_BOOT and that driver continues to run even if running
under EFI. Refer to the document, this parameter should clear
EFI_RUNTIME_SERVICES instead.
Documentation/kernel-parameters.txt:
===============================================================================
...
noefi [X86] Disable EFI runtime services support.
...
===============================================================================
Documentation/x86/x86_64/uefi.txt:
===============================================================================
...
- If some or all EFI runtime services don't work, you can try following
kernel command line parameters to turn off some or all EFI runtime
services.
noefi turn off all EFI runtime services
...
===============================================================================
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Link: http://lkml.kernel.org/r/511C2C04.2070108@jp.fujitsu.com
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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Vlad Yasevich says:
====================
VLAN filtering/VLAN aware bridge
Changes since v10
* Updated implemenation of ndo_fdb_del in emulex and qlogic drivers.
Changes since v9:
* series re-ordering so make functionality more distinct. Basic vlan
filtering is patches 1-4. Support for PVID/untagged vlans is patches
5 and 6. VLAN support for FDB/MDB is patches 7-11. Patch 12 is
still additional egress policy.
* Slight simplification to code that extracts the VID from skb. Since we
now depend on the vlan module, at the time of input skb_tci is guaranteed
to be set if the packet had 8021q header. We can simply refere to it.
* Changed the opaque 'parent' pointer from prior patches to a union so we
can be much more explicit in our assignments.
* Lots of additional testing with STP turned on. No issues were observed.
Changes since v8:
* Unified vlans_to_* calls into a single interface
* Fixed the rest of the issues report by Michal Miroslaw
* Fixed a bug where fdb entries were not created for all added vlans.
Changes since v7:
* Rebases on the latest net-next and removed the vlan wrapper patch from
the series.
* Fixed a crash in br_fdb_add/br_fdb_delete.
Changes since v6:
* VLANs are now stored in a VLAN bitmap per port. This allows for O(1)
lookup at ingress and egress. We simply check to see if the bit associated
with the vlan id is set in the map. The drawback to this approach is that
it wastes some space when there is only a small number of VLANs.
* In addition to the build time configuration option, VLAN filtering also has
a configuration paramter in sysfs. By default the filtering is turned off
and all traffic is permitted. When the filtring is turned on, we do strict
matching to the filter configured. Thus, if there is no configuration, all
packets are rejected. This was done to make the behavior more streight
forward. Without this (and if egress policy patch is rejected), the
decision for how to forward untagged traffic that was not filtered at ingress
is almost impossible to make. It would not be right to deliver to every
port that has PVID set as, each port may have a different PVID.
* Separate egress policy bitmap patch has been isolated and is provided last
in the series. This has been a more contentious piece of functionality and I
wanted to isolate it so that it could easily be dropped and not block the whole
series.
Changes since v5:
- Pulled VLAN filtering into its own file and made it a configuration options.
- Made new vlan filtering option dependent on VLAN_8021Q.
- Got rid of HW filter inlines and moved then vlan_core.c.
(All of the above suggested by Stephen Hemminger)
Changes since v4:
- Pull per-port vlan data into its own structures and give it to the bridge
device thus making bridge device behave like a regular port for vlan
configuration.
- Add a per-vlan 'untagged' bitmap that determins egress policy. If a port
is part of this bitmap, traffic egresses untagged.
- PVID is now used for ingress policy only. Incomming frames without VLAN tag
are assigned to the PVID vlan. Egress is determined via bitmap memberships.
- Allow for incremental config of a vlan. Now, PVID and untagged memberships
may be set on existing vlans. They however can NOT be cleared separately.
- VLAN deletion is now done via RTM_DELLINK command for PF_BRIDGE family.
This cleans up the netlink interface.
Changes since v3:
- Re-integrated compiler problems that got left out last time. Appologies.
- checkpatches.pl errors fixed
Changes since v2:
- Added inline functiosn to manimulate vlan hw filters and re-use in 8021q
and bridge code.
- Use rtnl_dereference (Michael Tsirkin)
- Remove synchronize_net() call (Eric Dumazet)
- Fix NULL ptr deref bug I introduced in br_ifinfo_notify.
Changes since v1:
- Fixed some forwarding bugs.
- Add vlan to local fdb entries. New local entries are created per vlan
to facilite correct forwarding to bridge interface.
- Allow configuration of vlans directly on the bridge master device
in addition to ports.
Changes since rfc v2:
- Per-port vlan bitmap is gone and is replaced with a vlan list.
- Added bridge vlan list, which is referenced by each port. Entries in
the birdge vlan list have port bitmap that shows which port are parts
of which vlan.
- Netlink API changes.
- Dropped sysfs support for now. If people think this is really usefull,
can add it back.
- Support for native/untagged vlans.
Changes since rfc v1:
- Comments addressed regarding formatting and RCU usage
- iocts have been removed and changed over the netlink interface.
- Added support of user added ndb entries.
- changed sysfs interface to export a bitmap. Also added a write interface.
I am not sure how much I like it, but it made my testing easier/faster. I
might change the write interface to take text instead of binary.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add an ability to configure a separate "untagged" egress
policy to the VLAN information of the bridge. This superseeds PVID
policy and makes PVID ingress-only. The policy is configured with a
new flag and is represented as a port bitmap per vlan. Egress frames
with a VLAN id in "untagged" policy bitmap would egress
the port without VLAN header.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When VLAN is added to the port, a local fdb entry for that port
(the entry with the mac address of the port) is added for that
VLAN. This way we can correctly determine if the traffic
is for the bridge itself. If the address of the port changes,
we try to change all the local fdb entries we have for that port.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a user adds bridge neighbors, allow him to specify VLAN id.
If the VLAN id is not specified, the neighbor will be added
for VLANs currently in the ports filter list. If no VLANs are
configured on the port, we use vlan 0 and only add 1 entry.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add vlan_id to multicasts groups so that we know which vlan
each group belongs to and can correctly forward to appropriate vlan.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds vlan to unicast fdb entries that are created for
learned addresses (not the manually configured ones). It adds
vlan id into the hash mix and uses vlan as an addditional parameter
for an entry match.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A user may designate a certain vlan as PVID. This means that
any ingress frame that does not contain a vlan tag is assigned to
this vlan and any forwarding decisions are made with this vlan in mind.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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At ingress, any untagged traffic is assigned to the PVID.
Any tagged traffic is filtered according to membership bitmap.
At egress, if the vlan matches the PVID, the frame is sent
untagged. Otherwise the frame is sent tagged.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Using the RTM_GETLINK dump the vlan filter list of a given
bridge port. The information depends on setting the filter
flag similar to how nic VF info is dumped.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add a netlink interface to add and remove vlan configuration on bridge port.
The interface uses the RTM_SETLINK message and encodes the vlan
configuration inside the IFLA_AF_SPEC. It is possble to include multiple
vlans to either add or remove in a single message.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When bridge forwards a frame, make sure that a frame is allowed
to egress on that port.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When a frame arrives on a port or transmitted by the bridge,
if we have VLANs configured, validate that a given VLAN is allowed
to enter the bridge.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Adds an optional infrustructure component to bridge that would allow
native vlan filtering in the bridge. Each bridge port (as well
as the bridge device) now get a VLAN bitmap. Each bit in the bitmap
is associated with a vlan id. This way if the bit corresponding to
the vid is set in the bitmap that the packet with vid is allowed to
enter and exit the port.
Write access the bitmap is protected by RTNL and read access
protected by RCU.
Vlan functionality is disabled by default.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The SMI counter is popular -- so display it by default
rather than requiring an option. What the heck,
we've blown the 80 column budget on many systems already...
Note that the value displayed is the delta
during the measurement interval.
The absolute value of the counter can still be seen with
the generic 32-bit MSR option, ie. -m 0x34
Signed-off-by: Len Brown <len.brown@intel.com>
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Here we disable HW promotion of C1 to C1E
and export both C1 and C1E and distinct C-states.
This allows a cpuidle governor to choose a lower latency
C-state than C1E when necessary to satisfy performance
and QOS constraints -- and still save power versus polling.
This also corrects the erroneous latency previously reported
for C1E -- it is 10usec, not 1usec.
Note that if you use "intel_idle.max_cstate=N",
then you must increment N by 1 to get the same behavior
after this change.
Signed-off-by: Len Brown <len.brown@intel.com>
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unregister_and_remove_pcpu on a NULL pointer is a no-op, so the NULL check in
sync_pcpu can be removed.
Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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This fixes CVE-2013-0228 / XSA-42
Drew Jones while working on CVE-2013-0190 found that that unprivileged guest user
in 32bit PV guest can use to crash the > guest with the panic like this:
-------------
general protection fault: 0000 [#1] SMP
last sysfs file: /sys/devices/vbd-51712/block/xvda/dev
Modules linked in: sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4
iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6
xt_state nf_conntrack ip6table_filter ip6_tables ipv6 xen_netfront ext4
mbcache jbd2 xen_blkfront dm_mirror dm_region_hash dm_log dm_mod [last
unloaded: scsi_wait_scan]
Pid: 1250, comm: r Not tainted 2.6.32-356.el6.i686 #1
EIP: 0061:[<c0407462>] EFLAGS: 00010086 CPU: 0
EIP is at xen_iret+0x12/0x2b
EAX: eb8d0000 EBX: 00000001 ECX: 08049860 EDX: 00000010
ESI: 00000000 EDI: 003d0f00 EBP: b77f8388 ESP: eb8d1fe0
DS: 0000 ES: 007b FS: 0000 GS: 00e0 SS: 0069
Process r (pid: 1250, ti=eb8d0000 task=c2953550 task.ti=eb8d0000)
Stack:
00000000 0027f416 00000073 00000206 b77f8364 0000007b 00000000 00000000
Call Trace:
Code: c3 8b 44 24 18 81 4c 24 38 00 02 00 00 8d 64 24 30 e9 03 00 00 00
8d 76 00 f7 44 24 08 00 00 02 80 75 33 50 b8 00 e0 ff ff 21 e0 <8b> 40
10 8b 04 85 a0 f6 ab c0 8b 80 0c b0 b3 c0 f6 44 24 0d 02
EIP: [<c0407462>] xen_iret+0x12/0x2b SS:ESP 0069:eb8d1fe0
general protection fault: 0000 [#2]
---[ end trace ab0d29a492dcd330 ]---
Kernel panic - not syncing: Fatal exception
Pid: 1250, comm: r Tainted: G D ---------------
2.6.32-356.el6.i686 #1
Call Trace:
[<c08476df>] ? panic+0x6e/0x122
[<c084b63c>] ? oops_end+0xbc/0xd0
[<c084b260>] ? do_general_protection+0x0/0x210
[<c084a9b7>] ? error_code+0x73/
-------------
Petr says: "
I've analysed the bug and I think that xen_iret() cannot cope with
mangled DS, in this case zeroed out (null selector/descriptor) by either
xen_failsafe_callback() or RESTORE_REGS because the corresponding LDT
entry was invalidated by the reproducer. "
Jan took a look at the preliminary patch and came up a fix that solves
this problem:
"This code gets called after all registers other than those handled by
IRET got already restored, hence a null selector in %ds or a non-null
one that got loaded from a code or read-only data descriptor would
cause a kernel mode fault (with the potential of crashing the kernel
as a whole, if panic_on_oops is set)."
The way to fix this is to realize that the we can only relay on the
registers that IRET restores. The two that are guaranteed are the
%cs and %ss as they are always fixed GDT selectors. Also they are
inaccessible from user mode - so they cannot be altered. This is
the approach taken in this patch.
Another alternative option suggested by Jan would be to relay on
the subtle realization that using the %ebp or %esp relative references uses
the %ss segment. In which case we could switch from using %eax to %ebp and
would not need the %ss over-rides. That would also require one extra
instruction to compensate for the one place where the register is used
as scaled index. However Andrew pointed out that is too subtle and if
further work was to be done in this code-path it could escape folks attention
and lead to accidents.
Reviewed-by: Petr Matousek <pmatouse@redhat.com>
Reported-by: Petr Matousek <pmatouse@redhat.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Mostly mirrors the s390 logic, as unlike x86 we don't need the
SetPageReferenced() bits.
On sparc64 we also lack a user/privileged bit in the huge PMDs.
In order to make this work for THP and non-THP builds, some header
file adjustments were necessary. Namely, provide the PMD_HUGE_* bit
defines and the pmd_large() inline unconditionally rather than
protected by TRANSPARENT_HUGEPAGE.
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This got missed in the cleanups done for the S390 THP
support.
CC: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
"This is primarily to get those r8169 reverts sorted, but other fixes
have accumulated meanwhile.
1) Revert two r8169 changes to fix suspend/resume for some users,
from Francois Romieu.
2) PCI dma mapping errors in atl1c are not checked for and this cause
hard crashes for some users, from Xiong Huang.
3) In 3.8.x we merged the removal of the EXPERIMENTAL dependency for
'dlm' but the same patch for 'sctp' got lost somewhere, resulting
in the potential for build errors since there are cross
dependencies. From Kees Cook.
4) SCTP's ipv6 socket route validation makes boolean tests
incorrectly, fix from Daniel Borkmann.
5) mac80211 does sizeof(ptr) instead of (sizeof(ptr) * nelem), from
Cong Ding.
6) arp_rcv() can crash on shared non-linear packets, from Eric
Dumazet.
7) Avoid crashes in macvtap by setting ->gso_type consistently in
ixgbe, qlcnic, and bnx2x drivers. From Michael S Tsirkin and
Alexander Duyck.
8) Trinity fuzzer spots infinite loop in __skb_recv_datagram(), fix
from Eric Dumazet.
9) STP protocol frames should use high packet priority, otherwise an
overloaded bridge can get stuck. From Stephen Hemminger.
10) The HTB packet scheduler was converted some time ago to store
internal timestamps in nanoseconds, but we don't convert back into
psched ticks for the user during dumps. Fix from Jiri Pirko.
11) mwl8k channel table doesn't set the .band field properly,
resulting in NULL pointer derefs. Fix from Jonas Gorski.
12) mac80211 doesn't accumulate channels properly during a scan so we
can downgrade heavily to a much less desirable connection speed.
Fix from Johannes Berg.
13) PHY probe failure in stmmac can result in resource leaks and
double MDIO registery later, from Giuseppe CAVALLARO.
14) Correct ipv6 checksumming in ip6t_NPT netfilter module, also fix
address prefix mangling, from YOSHIFUJI Hideaki."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (27 commits)
net, sctp: remove CONFIG_EXPERIMENTAL
net: sctp: sctp_v6_get_dst: fix boolean test in dst cache
batman-adv: Fix NULL pointer dereference in DAT hash collision avoidance
net/macb: fix race with RX interrupt while doing NAPI
atl1c: add error checking for pci_map_single functions
htb: fix values in opt dump
ixgbe: Only set gso_type to SKB_GSO_TCPV4 as RSC does not support IPv6
net: fix infinite loop in __skb_recv_datagram()
net: qmi_wwan: add Yota / Megafon M100-1 4g modem
mwl8k: fix band for supported channels
bridge: set priority of STP packets
mac80211: fix channel selection bug
arp: fix possible crash in arp_rcv()
bnx2x: set gso_type
qlcnic: set gso_type
ixgbe: fix gso type
stmmac: mdio register has to fail if the phy is not found
stmmac: fix macro used for debugging the xmit
Revert "r8169: enable internal ASPM and clock request settings".
Revert "r8169: enable ALDPS for power saving".
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Peter Anvin:
"One (hopefully) last batch of x86 fixes. You asked for the patch by
patch justifications, so here they are:
x86, MCE: Retract most UAPI exports
This one unexports from userspace a bunch of definitions which should
never have been exported. We really don't want to create an
accidental legacy here.
x86, doc: Add a bootloader ID for OVMF
This is a documentation-only patch, just recording the official
assignment of a boot loader ID.
x86: Do not leak kernel page mapping locations
Security: avoid making it needlessly easy for user space to probe the
kernel memory layout.
x86/mm: Check if PUD is large when validating a kernel address
Prevent failures using /proc/kcore when using 1G pages.
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
Works around a BIOS problem causing boot failures on affected hardware."
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mm: Check if PUD is large when validating a kernel address
x86/apic: Work around boot failure on HP ProLiant DL980 G7 Server systems
x86, doc: Add a bootloader ID for OVMF
x86: Do not leak kernel page mapping locations
x86, MCE: Retract most UAPI exports
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Change to my private email, change to my shiny new kernel.org repos,
and drop outdated entry from the former maintainer. Drop my PCA entry,
too, since it belongs to the I2C realm anyhow.
Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
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Adjusting of data pointers in net/netfilter/nf_conntrack_frag6_*
sysctl table for other namespaces points to wrong netns_frags
structure and has reversed order of entries.
Problem introduced by commit c038a767cd69 in 3.7-rc1
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In order to avoid any future surprises of kernel panics due to jprobes
function mismatches (as e.g. fixed in 4cb9d6eaf85ecd: sctp: jsctp_sf_eat_sack:
fix jprobes function signature mismatch), we should check both function
types during build and scream loudly if they do not match. __same_type
resolves to __builtin_types_compatible_p, which is 1 in case both types
are the same and 0 otherwise, qualifiers are ignored. Tested by myself.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function jsctp_sf_eat_sack can be made static, no need to extend
its visibility.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some callers may want to know if PHY write succeed. Also make PHY
functions static, they are not exported anywhere.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Devices are added to pci_pme_list when drivers use pci_enable_wake()
or pci_wake_from_d3(), but they aren't removed from the list unless
the driver explicitly disables wakeup. Many drivers never disable
wakeup, so their devices remain on the list even after they are
removed, e.g., via hotplug. A subsequent PME poll will oops when
it tries to touch the device.
This patch disables PME# on a device before removing it, which removes
the device from pci_pme_list. This is safe even if the device never
had PME# enabled.
This oops can be triggered by unplugging a Thunderbolt ethernet adapter
on a Macbook Pro, as reported by Daniel below.
[bhelgaas: changelog]
Reference: http://lkml.kernel.org/r/CAMVG2svG21yiM1wkH4_2pen2n+cr2-Zv7TbH3Gj+8MwevZjDbw@mail.gmail.com
Reported-and-tested-by: Daniel J Blueman <daniel@quora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org
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This config item has not carried much meaning for a while now and is
almost always enabled by default. As agreed during the Linux kernel
summit, remove it.
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current code expects that the last word (with valid bit)
of an MCC compl is DMAed in one shot. This may not be the case.
Remove this assertion.
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We walk through the bind address list and try to get the best source
address for a given destination. However, currently, we take the
'continue' path of the loop when an entry is invalid (!laddr->valid)
*and* the entry state does not equal SCTP_ADDR_SRC (laddr->state !=
SCTP_ADDR_SRC).
Thus, still, invalid entries with SCTP_ADDR_SRC might not 'continue'
as well as valid entries with SCTP_ADDR_{NEW, SRC, DEL}, with a possible
false baddr and matchlen as a result, causing in worst case dst route
to be false or possibly NULL.
This test should actually be a '||' instead of '&&'. But lets fix it
and make this a bit easier to read by having the condition the same way
as similarly done in sctp_v4_get_dst.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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