This resolves the merge issue with drivers/usb/core/hcd.c
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some panels (i.e. N116BGE-L41), in their power sequence specifications,
request a delay between set the PWM signal and enable the backlight and
between clear the PWM signal and disable the backlight. Add support for
the new post-pwm-on-delay-ms and pwm-off-delay-ms proprieties to meet
the timings.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This driver provides access to RAVE SP backlight control
functionality.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
tracepoints to bpf core were added as a way to provide introspection
to bpf programs and maps, but after some time it became clear that
this approach is inadequate, so prog_id, map_id and corresponding
get_next_id, get_fd_by_id, get_info_by_fd, prog_query APIs were
introduced and fully adopted by bpftool and other applications.
The tracepoints in bpf core started to rot and causing syzbot warnings:
WARNING: CPU: 0 PID: 3008 at kernel/trace/trace_event_perf.c:274
Kernel panic - not syncing: panic_on_warn set ...
perf_trace_bpf_map_keyval+0x260/0xbd0 include/trace/events/bpf.h:228
trace_bpf_map_update_elem include/trace/events/bpf.h:274 [inline]
map_update_elem kernel/bpf/syscall.c:597 [inline]
SYSC_bpf kernel/bpf/syscall.c:1478 [inline]
Hence this patch deletes tracepoints in bpf core.
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Reported-by: syzbot <bot+a9dbb3c3e64b62536a4bc5ee7bbd4ca627566188@syzkaller.appspotmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
We have about 53 netdev_features_t bits defined and counting, add a
build time check to catch when an u64 type will not be enough and we
will have to convert that to a bitmap. This is done in
register_netdevice() for convenience.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I am dropping the export of __skb_tx_hash as after my patches nobody is
using it outside of the net/core/dev.c file. In addition I am renaming and
repurposing it to just be a static declaration of skb_tx_hash since that
was the only user for it at this point. By doing this the compiler can
inline it into __netdev_pick_tx as that will improve performance.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull timer fixes from Thomas Gleixner:
"Two fixes from the timer departement:
- Fix a long standing issue in the NOHZ tick code which causes RB
tree corruption, delayed timers and other malfunctions. The cause
for this is code which modifies the expiry time of an enqueued
hrtimer.
- Revert the CLOCK_MONOTONIC/CLOCK_BOOTTIME unification due to
regression reports. Seems userspace _is_ relying on the documented
behaviour despite our hope that it wont"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME
tick/sched: Do not mess with an enqueued hrtimer
When helpers like bpf_get_stack returns an int value
and later on used for arithmetic computation, the LSH and ARSH
operations are often required to get proper sign extension into
64-bit. For example, without this patch:
54: R0=inv(id=0,umax_value=800)
54: (bf) r8 = r0
55: R0=inv(id=0,umax_value=800) R8_w=inv(id=0,umax_value=800)
55: (67) r8 <<= 32
56: R8_w=inv(id=0,umax_value=3435973836800,var_off=(0x0; 0x3ff00000000))
56: (c7) r8 s>>= 32
57: R8=inv(id=0)
With this patch:
54: R0=inv(id=0,umax_value=800)
54: (bf) r8 = r0
55: R0=inv(id=0,umax_value=800) R8_w=inv(id=0,umax_value=800)
55: (67) r8 <<= 32
56: R8_w=inv(id=0,umax_value=3435973836800,var_off=(0x0; 0x3ff00000000))
56: (c7) r8 s>>= 32
57: R8=inv(id=0, umax_value=800,var_off=(0x0; 0x3ff))
With better range of "R8", later on when "R8" is added to other register,
e.g., a map pointer or scalar-value register, the better register
range can be derived and verifier failure may be avoided.
In our later example,
......
usize = bpf_get_stack(ctx, raw_data, max_len, BPF_F_USER_STACK);
if (usize < 0)
return 0;
ksize = bpf_get_stack(ctx, raw_data + usize, max_len - usize, 0);
......
Without improving ARSH value range tracking, the register representing
"max_len - usize" will have smin_value equal to S64_MIN and will be
rejected by verifier.
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Currently, stackmap and bpf_get_stackid helper are provided
for bpf program to get the stack trace. This approach has
a limitation though. If two stack traces have the same hash,
only one will get stored in the stackmap table,
so some stack traces are missing from user perspective.
This patch implements a new helper, bpf_get_stack, will
send stack traces directly to bpf program. The bpf program
is able to see all stack traces, and then can do in-kernel
processing or send stack traces to user space through
shared map or bpf_perf_event_output.
Acked-by: Alexei Starovoitov <ast@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
As part of the work of migrating all the drivers to nand_scan(), and
because nand_scan() does not provide a way to pass an ID table, rename
the function nand_scan_with_ids() and add a third parameter to give a
flash ID table (like what was done with nand_scan_ident()).
Create a nand_scan() helper that is just a wrapper of
nand_scan_with_ids(), passing NULL as the ID table. This way a
controller drivers can continue using nand_scan() transparently.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
The comment claims that this helper will try not to loose bits, but for
64bit long it looses the high bits before hashing 64bit long into 32bit
int. Use the helper hash_long() to do the right thing for 64bit long.
For 32bit long, there is no change.
All the callers of end_name_hash() either assign the result to
qstr->hash, which is u32 or return the result as an int value (e.g.
full_name_hash()). Change the helper return type to int to conform to
its users.
[ It took me a while to apply this, because my initial reaction to it
was - incorrectly - that it could make for slower code.
After having looked more at it, I take back all my complaints about
the patch, Amir was right and I was mis-reading things or just being
stupid.
I also don't worry too much about the possible performance impact of
this on 64-bit, since most architectures that actually care about
performance end up not using this very much (the dcache code is the
most performance-critical, but the word-at-a-time case uses its own
hashing anyway).
So this ends up being mostly used for filesystems that do their own
degraded hashing (usually because they want a case-insensitive
comparison function).
A _tiny_ worry remains, in that not everybody uses DCACHE_WORD_ACCESS,
and then this potentially makes things more expensive on 64-bit
architectures with slow or lacking multipliers even for the normal
case.
That said, realistically the only such architecture I can think of is
PA-RISC. Nobody really cares about performance on that, it's more of a
"look ma, I've got warts^W an odd machine" platform.
So the patch is fine, and all my initial worries were just misplaced
from not looking at this properly. - Linus ]
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After commit c59530d0d5 ("net: Move PHY statistics code into PHY
library helpers") we made net/core/ethtool.c reference symbols which are
part of the library which can be modular. David introduced a temporary
fix with 1ecd6e8ad9 ("phy: Temporary build fix after phylib changes.")
which would prevent such modularity.
This is not desireable of course, so instead, just inline the functions
into include/linux/phy.h to keep both options available.
Fixes: c59530d0d5 ("net: Move PHY statistics code into PHY library helpers")
Fixes: 1ecd6e8ad9 ("phy: Temporary build fix after phylib changes.")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Merge tag 'v4.17-rc2' into docs-next
Merge -rc2 to pick up the changes to
Documentation/core-api/kernel-api.rst that hit mainline via the
networking tree. In their absence, subsequent patches cannot be
applied.
Here are some small char and misc driver fixes for 4.17-rc3
A variety of small things that have fallen out after 4.17-rc1 was out.
Some vboxguest fixes for systems with lots of memory, amba bus fixes,
some MAINTAINERS updates, uio_hv_generic driver fixes, and a few other
minor things that resolve problems that people reported.
The amba bus fixes took twice to get right, the first time I messed up
applying the patches in the wrong order, hence the revert and later
addition again with the correct fix, sorry about that.
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char and misc driver fixes for 4.17-rc3
A variety of small things that have fallen out after 4.17-rc1 was out.
Some vboxguest fixes for systems with lots of memory, amba bus fixes,
some MAINTAINERS updates, uio_hv_generic driver fixes, and a few other
minor things that resolve problems that people reported.
The amba bus fixes took twice to get right, the first time I messed up
applying the patches in the wrong order, hence the revert and later
addition again with the correct fix, sorry about that.
All of these have been in linux-next with no reported issues"
* tag 'char-misc-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
ARM: amba: Fix race condition with driver_override
ARM: amba: Make driver_override output consistent with other buses
Revert "ARM: amba: Fix race condition with driver_override"
ARM: amba: Don't read past the end of sysfs "driver_override" buffer
ARM: amba: Fix race condition with driver_override
virt: vbox: Log an error when we fail to get the host version
virt: vbox: Use __get_free_pages instead of kmalloc for DMA32 memory
virt: vbox: Add vbg_req_free() helper function
virt: vbox: Move declarations of vboxguest private functions to private header
slimbus: Fix out-of-bounds access in slim_slicesize()
MAINTAINERS: add dri-devel&linaro-mm for Android ION
fpga-manager: altera-ps-spi: preserve nCONFIG state
MAINTAINERS: update my email address
uio_hv_generic: fix subchannel ring mmap
uio_hv_generic: use correct channel in isr
uio_hv_generic: make ring buffer attribute for primary channel
uio_hv_generic: set size of ring buffer attribute
ANDROID: binder: prevent transactions into own process.
Here are some small driver core and firmware fixes for 4.17-rc3
There's a kobject WARN() removal to make syzkaller a lot happier about
some "normal" error paths that it keeps hitting, which should reduce the
number of false-positives we have been getting recently.
There's also some fimware test and documentation fixes, and the
coredump() function signature change that needed to happen after -rc1
before drivers started to take advantage of it.
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg Kroah-Hartman:
"Here are some small driver core and firmware fixes for 4.17-rc3
There's a kobject WARN() removal to make syzkaller a lot happier about
some "normal" error paths that it keeps hitting, which should reduce
the number of false-positives we have been getting recently.
There's also some fimware test and documentation fixes, and the
coredump() function signature change that needed to happen after -rc1
before drivers started to take advantage of it.
All of these have been in linux-next with no reported issues"
* tag 'driver-core-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
firmware: some documentation fixes
selftests:firmware: fixes a call to a wrong function name
kobject: don't use WARN for registration failures
firmware: Fix firmware documentation for recent file renames
test_firmware: fix setting old custom fw path back on exit, second try
test_firmware: Install all scripts
drivers: change struct device_driver::coredump() return type to void
Here are some tty and serial driver fixes for reported issues for
4.17-rc3.
Nothing major, but a number of small things:
- device tree fixes/updates for serial ports
- earlycon fixes
- n_gsm fixes
- tty core change reverted to help resolve syszkaller reports
- other serial driver small fixes
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some tty and serial driver fixes for reported issues for
4.17-rc3.
Nothing major, but a number of small things:
- device tree fixes/updates for serial ports
- earlycon fixes
- n_gsm fixes
- tty core change reverted to help resolve syszkaller reports
- other serial driver small fixes
All of these have been in linux-next with no reported issues"
* tag 'tty-4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: Use __GFP_NOFAIL for tty_ldisc_get()
tty: serial: xuartps: Setup early console when uartclk is also passed
tty: Don't call panic() at tty_ldisc_init()
tty: Avoid possible error pointer dereference at tty_ldisc_restore().
dt-bindings: mvebu-uart: DT fix s/interrupts-names/interrupt-names/
tty: serial: qcom_geni_serial: Use signed variable to get IRQ
earlycon: Use a pointer table to fix __earlycon_table stride
serial: sh-sci: Document r8a77470 bindings
dt-bindings: meson-uart: DT fix s/clocks-names/clock-names/
serial: imx: fix cached UCR2 read on software reset
serial: imx: warn user when using unsupported configuration
serial: mvebu-uart: Fix local flags handling on termios update
tty: n_gsm: Fix DLCI handling for ADM mode if debug & 2 is not set
tty: n_gsm: Fix long delays with control frame timeouts in ADM mode
This round of fixes has two larger changes that came in last week:
- A set of a couple of patches all intended to finally turn on
USB support on various Amlogic SoC based boards. The respective
driver were not finalized until very late before the merge window
and the DT portion is the last bit now.
- A defconfig update for gemini that had repeatedly missed the
cut but that is required to actually boot any real machines
with the default build.
The rest are the usual small changes:
- A fix for a nasty build regression on the OMAP memory drivers
- A fix for a boot problem on Intel/Altera SocFPGA
- A MAINTAINER file update
- A couple of fixes for issues found by automated testing
(kernelci, coverity, sparse, ...)
- A few incorrect DT entries are updated to match the hardware
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Arnd Bergmann:
"This round of fixes has two larger changes that came in last week:
- a couple of patches all intended to finally turn on USB support on
various Amlogic SoC based boards. The respective driver were not
finalized until very late before the merge window and the DT
portion is the last bit now.
- a defconfig update for gemini that had repeatedly missed the cut
but that is required to actually boot any real machines with the
default build.
The rest are the usual small changes:
- a fix for a nasty build regression on the OMAP memory drivers
- a fix for a boot problem on Intel/Altera SocFPGA
- a MAINTAINER file update
- a couple of fixes for issues found by automated testing (kernelci,
coverity, sparse, ...)
- a few incorrect DT entries are updated to match the hardware"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: defconfig: Update Gemini defconfig
ARM: s3c24xx: jive: Fix some GPIO names
HISI LPC: Add Kconfig MFD_CORE dependency
ARM: dts: Fix NAS4220B pin config
MAINTAINERS: Remove myself as maintainer
arm64: dts: correct SATA addresses for Stingray
ARM64: dts: meson-gxm-khadas-vim2: enable the USB controller
ARM64: dts: meson-gxl-nexbox-a95x: enable the USB controller
ARM64: dts: meson-gxl-s905x-libretech-cc: enable the USB controller
ARM64: dts: meson-gx-p23x-q20x: enable the USB controller
ARM64: dts: meson-gxl-s905x-p212: enable the USB controller
ARM64: dts: meson-gxm: add GXM specific USB host configuration
ARM64: dts: meson-gxl: add USB host support
ARM: OMAP2+: Fix build when using split object directories
soc: bcm2835: Make !RASPBERRYPI_FIRMWARE dummies return failure
soc: bcm: raspberrypi-power: Fix use of __packed
ARM: dts: Fix cm2 and prm sizes for omap4
ARM: socfpga_defconfig: Remove QSPI Sector 4K size force
firmware: arm_scmi: remove redundant null check on array
arm64: dts: juno: drop unnecessary address-cells and size-cells properties
e7bfb3fdbd ("mtd: Stop updating erase_info->state and calling
mtd_erase_callback()")
* Fix a memory leak in the Tango NAND controller driver
* Fix read/write to a suspended erase block in the CFI driver
* Fix the DT parsing logic in the Marvell NAND controller driver
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Merge tag 'mtd/fixes-for-4.17-rc3' of git://git.infradead.org/linux-mtd
Pull mtd fixes from Boris Brezillon:
- Fix nanddev_mtd_erase() function to match the changes done in
e7bfb3fdbd ("mtd: Stop updating erase_info->state and calling
mtd_erase_callback()")
- Fix a memory leak in the Tango NAND controller driver
- Fix read/write to a suspended erase block in the CFI driver
- Fix the DT parsing logic in the Marvell NAND controller driver
* tag 'mtd/fixes-for-4.17-rc3' of git://git.infradead.org/linux-mtd:
mtd: rawnand: marvell: fix the chip-select DT parsing logic
mtd: cfi: cmdset_0002: Do not allow read/write to suspend erase block.
mtd: cfi: cmdset_0001: Workaround Micron Erase suspend bug.
mtd: cfi: cmdset_0001: Do not allow read/write to suspend erase block.
mtd: spi-nor: cadence-quadspi: Fix page fault kernel panic
mtd: nand: Fix nanddev_mtd_erase()
mtd: rawnand: tango: Fix struct clk memory leak
Add a new callback: get_ethtool_phy_stats() which allows network device
drivers not making use of the PHY library to return PHY statistics.
Update ethtool_get_phy_stats(), __ethtool_get_sset_count() and
__ethtool_get_strings() accordingly to interogate the network device
about ETH_SS_PHY_STATS.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In order to make it possible for network device drivers that do not
necessarily have a phy_device attached, but still report PHY statistics,
have a preliminary refactoring consisting in creating helper functions
that encapsulate the PHY device driver knowledge within PHYLIB.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
try_to_wake_up() might invoke delayacct_blkio_end() while holding the
pi_lock (which is a raw_spinlock_t). delayacct_blkio_end() acquires
task_delay_info.lock which is a spinlock_t. This causes a might sleep splat
on -RT where non raw spinlocks are converted to 'sleeping' spinlocks.
task_delay_info.lock is only held for a short amount of time so it's not a
problem latency wise to make convert it to a raw spinlock.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Balbir Singh <bsingharora@gmail.com>
Link: https://lkml.kernel.org/r/20180423161024.6710-1-bigeasy@linutronix.de
Whilst we currently provide smp_cond_load_acquire() and
atomic_cond_read_acquire(), there are cases where the ACQUIRE semantics are
not required because of a subsequent fence or release operation once the
conditional loop has exited.
This patch adds relaxed versions of the conditional spinning primitives
to avoid unnecessary barrier overhead on architectures such as arm64.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boqun.feng@gmail.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1524738868-31318-2-git-send-email-will.deacon@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The composite framework allows us to create gadgets composed from many
different functions, which need to fit into a single configuration
descriptor.
Some functions (like uvc) can produce configuration descriptors upwards
of 2500 bytes on their own.
This patch increases the limit from 1024 bytes to 4096.
Signed-off-by: Joel Pepper <joel.pepper@rwth-aachen.de>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This patch will move the Spreadtrum DMA request mode and interrupt type
into one head file for user to configure.
Signed-off-by: Eric Long <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Update the siginfo_layout function and enum siginfo_layout to represent
all of the possible field layouts of struct siginfo.
This allows the uses of siginfo_layout in um and arm64 where they are testing
for SIL_FAULT to be more accurate as this rules out the other cases.
Further this allows the switch statements on siginfo_layout to be simpler
if perhaps a little more wordy. Making it easier to understand what is
actually going on.
As SIL_FAULT_BNDERR and SIL_FAULT_PKUERR are never expected to appear
in signalfd just treat them as SIL_FAULT. To include them would take
20 extra bytes an pretty much fill up what is left of
signalfd_siginfo.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Latest header update will break QEMU (if it's rebuilt with the new
header) - and it seems that the code there is so fragile that any change
in this header will break it. Add a better interface so users do not
need to change their code every time that header changes.
Fix virtio console for spec compliance.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixups from Michael Tsirkin:
- Latest header update will break QEMU (if it's rebuilt with the new
header) - and it seems that the code there is so fragile that any
change in this header will break it. Add a better interface so users
do not need to change their code every time that header changes.
- Fix virtio console for spec compliance.
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_console: reset on out of memory
virtio_console: move removal code
virtio_console: drop custom control queue cleanup
virtio_console: free buffers after reset
virtio: add ability to iterate over vqs
virtio_console: don't tie bufs to a vq
virtio_balloon: add array of stat names
This patch adds cgroup_subsys->css_rstat_flush(). If a subsystem has
this callback, its csses are linked on cgrp->css_rstat_list and rstat
will call the function whenever the associated cgroup is flushed.
Flush is also performed when such csses are released so that residual
counts aren't lost.
Combined with the rstat API previous patches factored out, this allows
controllers to plug into rstat to manage their statistics in a
scalable way.
Signed-off-by: Tejun Heo <tj@kernel.org>
Currently, rstat flush path is protected with a mutex which is fine as
all the existing users are from interface file show path. However,
rstat is being generalized for use by controllers and flushing from
atomic contexts will be necessary.
This patch replaces cgroup_rstat_mutex with a spinlock and adds a
irq-safe flush function - cgroup_rstat_flush_irqsafe(). Explicit
yield handling is added to the flush path so that other flush
functions can yield to other threads and flushers.
Signed-off-by: Tejun Heo <tj@kernel.org>
cgroup_rstat is being generalized so that controllers can use it too.
This patch factors out and exposes the following interface functions.
* cgroup_rstat_updated(): Renamed from cgroup_rstat_cpu_updated() for
consistency.
* cgroup_rstat_flush_hold/release(): Factored out from base stat
implementation.
* cgroup_rstat_flush(): Verbatim expose.
While at it, drop assert on cgroup_rstat_mutex in
cgroup_base_stat_flush() as it crosses layers and make a minor comment
update.
v2: Added EXPORT_SYMBOL_GPL(cgroup_rstat_updated) to fix a build bug.
Signed-off-by: Tejun Heo <tj@kernel.org>
Base resource stat accounts universial (not specific to any
controller) resource consumptions on top of rstat. Currently, its
implementation is intermixed with rstat implementation making the code
confusing to follow.
This patch clarifies the distintion by doing the followings.
* Encapsulate base resource stat counters, currently only cputime, in
struct cgroup_base_stat.
* Move prev_cputime into struct cgroup and initialize it with cgroup.
* Rename the related functions so that they start with cgroup_base_stat.
* Prefix the related variables and field names with b.
This patch doesn't make any functional changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
stat is too generic a name and ends up causing subtle confusions.
It'll be made generic so that controllers can plug into it, which will
make the problem worse. Let's rename it to something more specific -
cgroup_rstat for cgroup recursive stat.
This patch does the following renames. No other changes.
* cpu_stat -> rstat_cpu
* stat -> rstat
* ?cstat -> ?rstatc
Note that the renames are selective. The unrenamed are the ones which
implement basic resource statistics on top of rstat. This will be
further cleaned up in the following patches.
Signed-off-by: Tejun Heo <tj@kernel.org>
".events" files generate file modified event to notify userland of
possible new events. Some of the events can be quite bursty
(e.g. memory high event) and generating notification each time is
costly and pointless.
This patch implements a event rate limit mechanism. If a new
notification is requested before 10ms has passed since the previous
notification, the new notification is delayed till then.
As this only delays from the second notification on in a given close
cluster of notifications, userland reactions to notifications
shouldn't be delayed at all in most cases while avoiding notification
storms.
Signed-off-by: Tejun Heo <tj@kernel.org>
Use C-style comment for the identifier as per
Documentation/process/license-rules.rst and remove the license boilerplate.
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20180426200747.8344-2-brgl@bgdev.pl
Adding the vector offset when calling to mlx5_vector2eqn() is wrong.
This is because mlx5_vector2eqn() checks if EQ index is equal to vector number
and the fact that the internal completion vectors that mlx5 allocates
don't get an EQ index.
The second problem here is that using effective_affinity_mask gives the same
CPU for different vectors.
This leads to unmapped queues when calling it from blk_mq_rdma_map_queues().
This doesn't happen when using affinity_hint mask.
Fixes: 2572cf57d7 ("mlx5: fix mlx5_get_vector_affinity to start from completion vector 0")
Fixes: 05e0cc84e0 ("net/mlx5: Fix get vector affinity helper function")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Virtual devices such as tunnels and bonding can handle large packets.
Only segment packets when reaching a physical or loopback device.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Support generic segmentation offload for udp datagrams. Callers can
concatenate and send at once the payload of multiple datagrams with
the same destination.
To set segment size, the caller sets socket option UDP_SEGMENT to the
length of each discrete payload. This value must be smaller than or
equal to the relevant MTU.
A follow-up patch adds cmsg UDP_SEGMENT to specify segment size on a
per send call basis.
Total byte length may then exceed MTU. If not an exact multiple of
segment size, the last segment will be shorter.
The implementation adds a gso_size field to the udp socket, ip(v6)
cmsg cookie and inet_cork structure to be able to set the value at
setsockopt or cmsg time and to work with both lockless and corked
paths.
Initial benchmark numbers show UDP GSO about as expensive as TCP GSO.
tcp tso
3197 MB/s 54232 msg/s 54232 calls/s
6,457,754,262 cycles
tcp gso
1765 MB/s 29939 msg/s 29939 calls/s
11,203,021,806 cycles
tcp without tso/gso *
739 MB/s 12548 msg/s 12548 calls/s
11,205,483,630 cycles
udp
876 MB/s 14873 msg/s 624666 calls/s
11,205,777,429 cycles
udp gso
2139 MB/s 36282 msg/s 36282 calls/s
11,204,374,561 cycles
[*] after reverting commit 0a6b2a1dc2
("tcp: switch to GSO being always on")
Measured total system cycles ('-a') for one core while pinning both
the network receive path and benchmark process to that core:
perf stat -a -C 12 -e cycles \
./udpgso_bench_tx -C 12 -4 -D "$DST" -l 4
Note the reduction in calls/s with GSO. Bytes per syscall drops
increases from 1470 to 61818.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Implement generic segmentation offload support for udp datagrams. A
follow-up patch adds support to the protocol stack to generate such
packets.
UDP GSO is not UFO. UFO fragments a single large datagram. GSO splits
a large payload into a number of discrete UDP datagrams.
The implementation adds a GSO type SKB_UDP_GSO_L4 to differentiate it
from UFO (SKB_UDP_GSO).
IPPROTO_UDPLITE is excluded, as that protocol has no gso handler
registered.
[ Export __udp_gso_segment for ipv6. -DaveM ]
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the blk-mq inflight implementation was added, /proc/diskstats was
converted to use it, but /sys/block/$dev/inflight was not. Fix it by
adding another helper to count in-flight requests by data direction.
Fixes: f299b7c7a9 ("blk-mq: provide internal in-flight variant")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Fix a build regression with split object directories reported by Russell
and fix range sizes for omap4 cm2 and prm modules.
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Merge tag 'omap-for-v4.17/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Pull "Two fixes for v4.17-rc cycle" from Tony Lindgren:
Fix a build regression with split object directories reported by Russell
and fix range sizes for omap4 cm2 and prm modules.
* tag 'omap-for-v4.17/fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Fix build when using split object directories
ARM: dts: Fix cm2 and prm sizes for omap4
Revert commits
92af4dcb4e ("tracing: Unify the "boot" and "mono" tracing clocks")
127bfa5f43 ("hrtimer: Unify MONOTONIC and BOOTTIME clock behavior")
7250a4047a ("posix-timers: Unify MONOTONIC and BOOTTIME clock behavior")
d6c7270e91 ("timekeeping: Remove boot time specific code")
f2d6fdbfd2 ("Input: Evdev - unify MONOTONIC and BOOTTIME clock behavior")
d6ed449afd ("timekeeping: Make the MONOTONIC clock behave like the BOOTTIME clock")
72199320d4 ("timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock")
As stated in the pull request for the unification of CLOCK_MONOTONIC and
CLOCK_BOOTTIME, it was clear that we might have to revert the change.
As reported by several folks systemd and other applications rely on the
documented behaviour of CLOCK_MONOTONIC on Linux and break with the above
changes. After resume daemons time out and other timeout related issues are
observed. Rafael compiled this list:
* systemd kills daemons on resume, after >WatchdogSec seconds
of suspending (Genki Sky). [Verified that that's because systemd uses
CLOCK_MONOTONIC and expects it to not include the suspend time.]
* systemd-journald misbehaves after resume:
systemd-journald[7266]: File /var/log/journal/016627c3c4784cd4812d4b7e96a34226/system.journal
corrupted or uncleanly shut down, renaming and replacing.
(Mike Galbraith).
* NetworkManager reports "networking disabled" and networking is broken
after resume 50% of the time (Pavel). [May be because of systemd.]
* MATE desktop dims the display and starts the screensaver right after
system resume (Pavel).
* Full system hang during resume (me). [May be due to systemd or NM or both.]
That happens on debian and open suse systems.
It's sad, that these problems were neither catched in -next nor by those
folks who expressed interest in this change.
Reported-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Reported-by: Genki Sky <sky@genki.is>,
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kevin Easton <kevin@guarana.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Given that we create one input node per application, we should name
the input node accordingly to not lose userspace.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
It is not a good idea to try to fit all types of applications in the
same input report. There are a lot of devices that are needing
the quirk HID_MULTI_INPUT but this quirk doesn't match the actual HID
description as it is based on the report ID.
Given that most devices with MULTI_INPUT I can think of split nicely
the devices inputs into application, it is a good thing to split the
devices by default based on this assumption.
Also make hid-multitouch following this rule, to not have to deal
with too many input created.
While we are at it, fix some checkpatch complaints about converting
'unsigned' to 'unsigned int'.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
We were only storing the report in case of QUIRK_MULTI_INPUT.
It is interesting for the upcoming HID_QUIRK_INPUT_PER_APP to also
store the full list of reports that are attached to it.
We need the full list because a device (Advanced Silicon has some)
might want to use a different report ID for the Input reports and
the Output reports. Storing the full list allows the drivers to
have all the data.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This is a signed tag/merge point to handle the cross-tree merge of the
USB and power supply subsystems for the patch series:
Subject: [PATCH v8 0/6] typec: tcpm: Add sink side support for PPS
It is based on the usb.git tree, in the usb-next branch, for merging in
4.18-rc1.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tags/tcpm-pps-4.18' into psy-next
Tag/Merge point for adding typeC power supply support
This is a signed tag/merge point to handle the cross-tree merge of the
USB and power supply subsystems for the patch series:
Subject: [PATCH v8 0/6] typec: tcpm: Add sink side support for PPS
It is based on the usb.git tree, in the usb-next branch, for merging in
4.18-rc1.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
There aren't many users of this so it doesn't cause a problem, but we
obviously want to use "__mptr" here instead of "ptr" to prevent the
parameter from being executed twice.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'for_v4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify fix from Jan Kara:
"A fix of a fsnotify race causing panics / softlockups"
* tag 'for_v4.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fsnotify: Fix fsnotify_mark_connector race
8 bug fixes, one spelling update and one tracepoint addition. The
most serious is probably the mpt3sas write same fix because it means
anyone using these controllers sees errors when modern filesystems try
to issue discards.
Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Eight bug fixes, one spelling update and one tracepoint addition.
The most serious is probably the mptsas write same fix because it
means anyone using these controllers sees errors when modern
filesystems try to issue discards"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: target: fix crash with iscsi target and dvd
scsi: sd_zbc: Avoid that resetting a zone fails sporadically
scsi: sd: Defer spinning up drive while SANITIZE is in progress
scsi: megaraid_sas: Do not log an error if FW successfully initializes.
scsi: ufs: add trace event for ufs upiu
scsi: core: remove reference to scsi_show_extd_sense()
scsi: mptsas: Disable WRITE SAME
scsi: fnic: fix spelling mistake in fnic stats "Abord" -> "Abort"
scsi: scsi_debug: IMMED related delay adjustments
scsi: iscsi: respond to netlink with unicast when appropriate
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Merge tag 'for-linus-20180425' of git://git.kernel.dk/linux-block
Pull block updates from Jens Axboe:
"I ended up sitting on this about a week longer than I wanted to, since
we were hashing out details with a timeout change. I've now killed
that patch, so we can flush the existing queue in due time.
This contains:
- Fix for an old regression, where entering the queue can be
disturbed by a signal to the process. This can cause spurious EIO.
Fix from Alan Jenkins.
- cdrom information leak fix from Dan.
- Trivial helper for testing queue FUA from Dave Chinner, part of his
O_DIRECT FUA series.
- Series of swim fixes from Finn that actually makes it work again.
- Loop O_DIRECT corruption fix, which caused data corruption in
production for us. From me.
- BFQ crash fix from me.
- bcache maintainer update. Michael no longer has the time to do it,
Coly has stepped up to serve as the new maintainer.
- blkcg locking fixes from Jiang Biao.
- Revert of a change from this merge window from Ming, that causes an
issue on some hardware.
- Minor clarification doc addition from Linus Walleij"
* tag 'for-linus-20180425' of git://git.kernel.dk/linux-block: (22 commits)
Revert "blk-mq: remove code for dealing with remapping queue"
block: mq: Add some minor doc for core structs
bcache: mark Coly Li as bcache maintainer
MAINTAINERS: Remove me as maintainer of bcache
blkcg: init root blkcg_gq under lock
blkcg: small fix on comment in blkcg_init_queue
blkcg: don't hold blkcg lock when deactivating policy
block: add blk_queue_fua() helper function
cdrom: information leak in cdrom_ioctl_media_changed()
bfq-iosched: ensure to clear bic/bfqq pointers when preparing request
blk-mq: start request gstate with gen 1
block/swim: Select appropriate drive on device open
block/swim: Fix IO error at end of medium
block/swim: Check drive type
block/swim: Rename macros to avoid inconsistent inverted logic
block/swim: Don't log an error message for an invalid ioctl
block/swim: Remove extra put_disk() call from error path
block/swim: Fix array bounds check
m68k/mac: Don't remap SWIM MMIO region
loop: handle short DIO reads
...
