These are changes for drivers that are intimately tied to some SoC
and for some reason could not get merged through the respective
subsystem maintainer tree.
The largest single change here this time around is the Tegra
iommu/memory controller driver, which gets updated to the new
iommu DT binding. More drivers like this are likely to follow
for the following merge window, but we should be able to do
those through the iommu maintainer.
Other notable changes are:
* reset controller drivers from the reset maintainer (socfpga, sti, berlin)
* fixes for the keystone navigator driver merged last time
* at91 rtc driver changes related to the at91 cleanups
* ARM perf driver changes from Will Deacon
* updates for the brcmstb_gisb driver
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Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Arnd Bergmann:
"These are changes for drivers that are intimately tied to some SoC and
for some reason could not get merged through the respective subsystem
maintainer tree.
The largest single change here this time around is the Tegra
iommu/memory controller driver, which gets updated to the new iommu DT
binding. More drivers like this are likely to follow for the
following merge window, but we should be able to do those through the
iommu maintainer.
Other notable changes are:
- reset controller drivers from the reset maintainer (socfpga, sti,
berlin)
- fixes for the keystone navigator driver merged last time
- at91 rtc driver changes related to the at91 cleanups
- ARM perf driver changes from Will Deacon
- updates for the brcmstb_gisb driver"
* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (53 commits)
clocksource: arch_timer: Allow the device tree to specify uninitialized timer registers
clocksource: arch_timer: Fix code to use physical timers when requested
memory: Add NVIDIA Tegra memory controller support
bus: brcmstb_gisb: Add register offset tables for older chips
bus: brcmstb_gisb: Look up register offsets in a table
bus: brcmstb_gisb: Introduce wrapper functions for MMIO accesses
bus: brcmstb_gisb: Make the driver buildable on MIPS
of: Add NVIDIA Tegra memory controller binding
ARM: tegra: Move AHB Kconfig to drivers/amba
amba: Add Kconfig file
clk: tegra: Implement memory-controller clock
serial: samsung: Fix serial config dependencies for exynos7
bus: brcmstb_gisb: resolve section mismatch
ARM: common: edma: edma_pm_resume may be unused
ARM: common: edma: add suspend resume hook
powerpc/iommu: Rename iommu_[un]map_sg functions
rtc: at91sam9: add DT bindings documentation
rtc: at91sam9: use clk API instead of relying on AT91_SLOW_CLOCK
ARM: at91: add clk_lookup entry for RTT devices
rtc: at91sam9: rework the Kconfig description
...
New and updated SoC support, notable changes include:
* bcm: brcmstb SMP support
* bcm: initial iproc/cygnus support
* exynos: Exynos4415 SoC support
* exynos: PMU and suspend support for Exynos5420
* exynos: PMU support for Exynos3250
* exynos: pm related maintenance
* imx: new LS1021A SoC support
* imx: vybrid 610 global timer support
* integrator: convert to using multiplatform configuration
* mediatek: earlyprintk support for mt8127/mt8135
* meson: meson8 soc and l2 cache controller support
* mvebu: Armada 38x CPU hotplug support
* mvebu: drop support for prerelease Armada 375 Z1 stepping
* mvebu: extended suspend support, now works on Armada 370/XP
* omap: hwmod related maintenance
* omap: prcm cleanup
* pxa: initial pxa27x DT handling
* rockchip: SMP support for rk3288
* rockchip: add cpu frequency scaling support
* shmobile: r8a7740 power domain support
* shmobile: various small restart, timer, pci apmu changes
* sunxi: Allwinner A80 (sun9i) earlyprintk support
* ux500: power domain support
Overall, a significant chunk of changes, coming mostly from
the usual suspects: omap, shmobile, samsung and mvebu, all of
which already contain a lot of platform specific code in
arch/arm.
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Merge tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform changes from Arnd Bergmann:
"New and updated SoC support, notable changes include:
- bcm:
brcmstb SMP support
initial iproc/cygnus support
- exynos:
Exynos4415 SoC support
PMU and suspend support for Exynos5420
PMU support for Exynos3250
pm related maintenance
- imx:
new LS1021A SoC support
vybrid 610 global timer support
- integrator:
convert to using multiplatform configuration
- mediatek:
earlyprintk support for mt8127/mt8135
- meson:
meson8 soc and l2 cache controller support
- mvebu:
Armada 38x CPU hotplug support
drop support for prerelease Armada 375 Z1 stepping
extended suspend support, now works on Armada 370/XP
- omap:
hwmod related maintenance
prcm cleanup
- pxa:
initial pxa27x DT handling
- rockchip:
SMP support for rk3288
add cpu frequency scaling support
- shmobile:
r8a7740 power domain support
various small restart, timer, pci apmu changes
- sunxi:
Allwinner A80 (sun9i) earlyprintk support
- ux500:
power domain support
Overall, a significant chunk of changes, coming mostly from the usual
suspects: omap, shmobile, samsung and mvebu, all of which already
contain a lot of platform specific code in arch/arm"
* tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (187 commits)
ARM: mvebu: use the cpufreq-dt platform_data for independent clocks
soc: integrator: Add terminating entry for integrator_cm_match
ARM: mvebu: add SDRAM controller description for Armada XP
ARM: mvebu: adjust mbus controller description on Armada 370/XP
ARM: mvebu: add suspend/resume DT information for Armada XP GP
ARM: mvebu: synchronize secondary CPU clocks on resume
ARM: mvebu: make sure MMU is disabled in armada_370_xp_cpu_resume
ARM: mvebu: Armada XP GP specific suspend/resume code
ARM: mvebu: reserve the first 10 KB of each memory bank for suspend/resume
ARM: mvebu: implement suspend/resume support for Armada XP
clk: mvebu: add suspend/resume for gatable clocks
bus: mvebu-mbus: provide a mechanism to save SDRAM window configuration
bus: mvebu-mbus: suspend/resume support
clocksource: time-armada-370-xp: add suspend/resume support
irqchip: armada-370-xp: Add suspend/resume support
ARM: add lolevel debug support for asm9260
ARM: add mach-asm9260
ARM: EXYNOS: use u8 for val[] in struct exynos_pmu_conf
power: reset: imx-snvs-poweroff: add power off driver for i.mx6
ARM: imx: temporarily remove CONFIG_SOC_FSL from LS1021A
...
The remaining cleanups for 3.19 are to a large part result of
devicetree conversion nearing completion on two other platforms
besides AT91:
* Like AT91, Renesas shmobile is in the process to migrate to DT and
multiplatform, but using a different approach of doing it one
SoC at a time. For 3.19, the r8a7791 platform and associated\
"Koelsch" board are considered complete and we remove the non-DT
non-multiplatform support for this.
* The ARM Versatile Express has supported DT and multiplatform
for a long time, but we have still kept the legacy board files
around, because not all drivers were fully working before. We
have finally taken the last step to remove the board files.
Other changes in this branch are preparation for the later branches
or just unrelated to the more interesting changes:
* The dts files for arm64 get moved into per-vendor directories for
a clearer structure.
* Some dead code removal (zynq, exynos, davinci, imx)
* Using pr_*() macros more consistently instead of printk(KERN_*)
in some platform code.
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Merge tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Arnd Bergmann:
"The remaining cleanups for 3.19 are to a large part result of
devicetree conversion nearing completion on two other platforms
besides AT91:
- Like AT91, Renesas shmobile is in the process to migrate to DT and
multiplatform, but using a different approach of doing it one SoC
at a time. For 3.19, the r8a7791 platform and associated "Koelsch"
board are considered complete and we remove the non-DT
non-multiplatform support for this.
- The ARM Versatile Express has supported DT and multiplatform for a
long time, but we have still kept the legacy board files around,
because not all drivers were fully working before. We have finally
taken the last step to remove the board files.
Other changes in this branch are preparation for the later branches or
just unrelated to the more interesting changes:
- The dts files for arm64 get moved into per-vendor directories for a
clearer structure.
- Some dead code removal (zynq, exynos, davinci, imx)
- Using pr_*() macros more consistently instead of printk(KERN_*) in
some platform code"
* tag 'cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (71 commits)
ARM: zynq: Remove secondary_startup() declaration from header
ARM: vexpress: Enable regulator framework when MMCI is in use
ARM: vexpress: Remove non-DT code
ARM: imx: Remove unneeded .map_io initialization
ARM: dts: imx6qdl-sabresd: Fix the microphone route
ARM: imx: refactor mxc_iomux_mode()
ARM: imx: simplify clk_pllv3_prepare()
ARM: imx6q: drop unnecessary semicolon
ARM: imx: clean up machine mxc_arch_reset_init_dt reset init
ARM: dts: imx6qdl-rex: Remove unneeded 'fsl,mode' property
ARM: dts: imx6qdl-gw5x: Remove unneeded 'fsl,mode' property
ARM: dts: imx6qdl-sabresd: Use IMX6QDL_CLK_CKO define
ARM: at91: remove useless init_time for DT-only SoCs
ARM: davinci: Remove redundant casts
ARM: davinci: Use standard logging styles
ARM: shmobile: r8a7779: Spelling/grammar s/entity/identity/, s/map/mapping/
ARM: shmobile: sh7372: Spelling/grammar s/entity map/identity mapping/
ARM: shmobile: sh73a0: Spelling/grammar s/entity map/identity mapping/
ARM: EXYNOS: Remove unused static iomapping
ARM: at91: fix build breakage due to legacy board removals
...
These are bug fixes for harmless problems that were not important
enough to get fixed in 3.19. This contains updates to the MAINTAINERS
file, in particular:
- Ben Dooks stepped down as Samsung co-maintainer (thanks Ben for
long years of maintaining this). Kukjin Kim, who has been
doing the work de-facto by himself recently is now the
only maintainer.
- Liviu, Sudeep and Lorenzo from ARM now officially maintain the
Versatile Express platform, which was orphaned (thanks for
- Gregory Fong and Florian Fainelli help out on the Broadcom BCM7XXX
platform
- Ray Jui and Scott Branden are the future maintainers for the
newly merged Broadcom Cygnus platform. Welcome!
In terms of actual fixes, we have the usual set of OMAP bug fixes,
which Tony Lindgren separates out well from the other OMAP changes,
one really ep93xx regression fix against 3.11 that didn't make it for
3.18, a few GIC changes from Marc Zyngier as a preparation for
later rework (the current code is wrong in a harmless way), on
Tegra regression and one samsung spelling fix.
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Merge tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC non-critical bug fixes from Arnd Bergmann:
"These are bug fixes for harmless problems that were not important
enough to get fixed in 3.19. This contains updates to the MAINTAINERS
file, in particular:
- Ben Dooks stepped down as Samsung co-maintainer (thanks Ben for
long years of maintaining this). Kukjin Kim, who has been doing
the work de-facto by himself recently is now the only maintainer.
- Liviu, Sudeep and Lorenzo from ARM now officially maintain the
Versatile Express platform, which was orphaned (thanks for
- Gregory Fong and Florian Fainelli help out on the Broadcom BCM7XXX
platform
- Ray Jui and Scott Branden are the future maintainers for the newly
merged Broadcom Cygnus platform. Welcome!
In terms of actual fixes, we have the usual set of OMAP bug fixes,
which Tony Lindgren separates out well from the other OMAP changes,
one really ep93xx regression fix against 3.11 that didn't make it for
3.18, a few GIC changes from Marc Zyngier as a preparation for later
rework (the current code is wrong in a harmless way), on Tegra
regression and one samsung spelling fix"
* tag 'fixes-nc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: imx6: fix bogus use of irq_get_irq_data
ARM: imx: irq: fix buggy usage of irq_data irq field
MAINTAINERS: ARM Versatile Express platform, add missing pattern
MAINTAINERS: ARM Versatile Express platform
arm: ep93xx: add dma_masks for the M2P and M2M DMA controllers
MAINTAINERS: Add ahci_st.c to ARCH/STI architecture
MAINTAINERS: add entry for the GISB arbiter driver
MAINTAINERS: update brcmstb entries
MAINTAINERS: update email address and cleanup for exynos entry
ARM: tegra: Re-add removed SoC id macro to tegra_resume()
MAINTAINERS: Entry for Cygnus/iproc arm architecture
ARM: OMAP: serial: remove last vestige of DTR_gpio support.
ARM: OMAP2+: gpmc: Get rid of "ti,elm-id not found" warning
ARM: EXYNOS: fix typo in static struct name "exynos5_list_diable_wfi_wfe"
ARM: OMAP2: Remove unnecessary KERN_* in omap_phy_internal.c
ARM: OMAP4+: Remove unused omap_l3_noc platform init
ARM: dts: Add twl keypad map for omap3 EVM
ARM: dts: Add twl keypad map for LDP
ARM: dts: Fix NAND last partition size on LDP
ARM: OMAP3: Fix errors for omap_l3_smx when booted with device tree
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Merge tag 'linux-can-next-for-3.19-20141207' of git://gitorious.org/linux-can/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2014-12-07
this is a pull request of 8 patches for net-next/master.
Andri Yngvason contributes 4 patches in which the CAN state change
handling is consolidated and unified among the sja1000, mscan and
flexcan driver. The three patches by Jeremiah Mahler fix spelling
mistakes and eliminate the banner[] variable in various parts. And a
patch by me that switches on sparse endianess checking by default.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 95bd09eb2750 ("tcp: TSO packets automatic sizing") tried to
control TSO size, but did this at the wrong place (sendmsg() time)
At sendmsg() time, we might have a pessimistic view of flow rate,
and we end up building very small skbs (with 2 MSS per skb).
This is bad because :
- It sends small TSO packets even in Slow Start where rate quickly
increases.
- It tends to make socket write queue very big, increasing tcp_ack()
processing time, but also increasing memory needs, not necessarily
accounted for, as fast clones overhead is currently ignored.
- Lower GRO efficiency and more ACK packets.
Servers with a lot of small lived connections suffer from this.
Lets instead fill skbs as much as possible (64KB of payload), but split
them at xmit time, when we have a precise idea of the flow rate.
skb split is actually quite efficient.
Patch looks bigger than necessary, because TCP Small Queue decision now
has to take place after the eventual split.
As Neal suggested, introduce a new tcp_tso_autosize() helper, so that
tcp_tso_should_defer() can be synchronized on same goal.
Rename tp->xmit_size_goal_segs to tp->gso_segs, as this variable
contains number of mss that we can put in GSO packet, and is not
related to the autosizing goal anymore.
Tested:
40 ms rtt link
nstat >/dev/null
netperf -H remote -l -2000000 -- -s 1000000
nstat | egrep "IpInReceives|IpOutRequests|TcpOutSegs|IpExtOutOctets"
Before patch :
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/s
87380 2000000 2000000 0.36 44.22
IpInReceives 600 0.0
IpOutRequests 599 0.0
TcpOutSegs 1397 0.0
IpExtOutOctets 2033249 0.0
After patch :
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
87380 2000000 2000000 0.36 44.27
IpInReceives 221 0.0
IpOutRequests 232 0.0
TcpOutSegs 1397 0.0
IpExtOutOctets 2013953 0.0
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
... making both non-draining. That means that tcp_recvmsg() becomes
non-draining. And _that_ would break iscsit_do_rx_data() unless we
a) make sure tcp_recvmsg() is uniformly non-draining (it is)
b) make sure it copes with arbitrary (including shifted)
iov_iter (it does, all it uses is iov_iter primitives)
c) make iscsit_do_rx_data() initialize ->msg_iter only once.
Fortunately, (c) is doable with minimal work and we are rid of one
the two places where kernel send/recvmsg users would be unhappy with
non-draining behaviour.
Actually, that makes all but one of ->recvmsg() instances iov_iter-clean.
The exception is skcipher_recvmsg() and it also isn't hard to convert
to primitives (iov_iter_get_pages() is needed there). That'll wait
a bit - there's some interplay with ->sendmsg() path for that one.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Changes include:
- Support for alternative instruction patching from Andre
- seccomp from Akashi
- Some AArch32 instruction emulation, required by the Android folks
- Optimisations for exception entry/exit code, cmpxchg, pcpu atomics
- mmu_gather range calculations moved into core code
- EFI updates from Ard, including long-awaited SMBIOS support
- /proc/cpuinfo fixes to align with the format used by arch/arm/
- A few non-critical fixes across the architecture
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"Here's the usual mixed bag of arm64 updates, also including some
related EFI changes (Acked by Matt) and the MMU gather range cleanup
(Acked by you).
Changes include:
- support for alternative instruction patching from Andre
- seccomp from Akashi
- some AArch32 instruction emulation, required by the Android folks
- optimisations for exception entry/exit code, cmpxchg, pcpu atomics
- mmu_gather range calculations moved into core code
- EFI updates from Ard, including long-awaited SMBIOS support
- /proc/cpuinfo fixes to align with the format used by arch/arm/
- a few non-critical fixes across the architecture"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (70 commits)
arm64: remove the unnecessary arm64_swiotlb_init()
arm64: add module support for alternatives fixups
arm64: perf: Prevent wraparound during overflow
arm64/include/asm: Fixed a warning about 'struct pt_regs'
arm64: Provide a namespace to NCAPS
arm64: bpf: lift restriction on last instruction
arm64: Implement support for read-mostly sections
arm64: compat: align cacheflush syscall with arch/arm
arm64: add seccomp support
arm64: add SIGSYS siginfo for compat task
arm64: add seccomp syscall for compat task
asm-generic: add generic seccomp.h for secure computing mode 1
arm64: ptrace: allow tracer to skip a system call
arm64: ptrace: add NT_ARM_SYSTEM_CALL regset
arm64: Move some head.text functions to executable section
arm64: jump labels: NOP out NOP -> NOP replacement
arm64: add support to dump the kernel page tables
arm64: Add FIX_HOLE to permanent fixed addresses
arm64: alternatives: fix pr_fmt string for consistency
arm64: vmlinux.lds.S: don't discard .exit.* sections at link-time
...
Move the port check [ipvlan_dev_master()] and device check
[ipvlan_dev_slave()] functions to netdevice.h and rename them
netif_is_ipvlan_port() and netif_is_ipvlan() resp. to be
consistent with macvlan api naming.
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Similar to a check for macvlan device, netif_is_macvlan(), add
another function to check if a device is used as macvlan port.
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since commit f8864972126899 ("ipv4: fix dst race in sk_dst_get()")
DST_NOCACHE dst_entries get freed by RCU. So there is no need to get a
reference on them when we are in rcu protected sections.
Cc: Eric Dumazet <edumazet@google.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
legacy_only flag is now unused, drop it from core.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Commit ce1a4ea3f125 ("net: avoid one atomic operation in skb_clone()")
took the wrong way to save one atomic operation.
It is actually possible to avoid two atomic operations, if we
do not change skb->fclone values, and only rely on clone_ref
content to signal if the clone is available or not.
skb_clone() can simply use the fast clone if clone_ref is 1.
kfree_skbmem() can avoid the atomic_dec_and_test() if clone_ref is 1.
Note that because we usually free the clone before the original skb,
this particular attempt is only done for the original skb to have better
branch prediction.
SKB_FCLONE_FREE is removed.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Chris Mason <clm@fb.com>
Cc: Sabrina Dubroca <sd@queasysnail.net>
Cc: Vijay Subramanian <subramanian.vijay@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The commit 56bfa7ee7c ("unregister_netdevice : move RTM_DELLINK to
until after ndo_uninit") tried to do this ealier but while doing so
it created a problem. Unfortunately the delayed rtmsg_ifinfo() also
delayed call to fill_info(). So this translated into asking driver
to remove private state and then query it's private state. This
could have catastropic consequences.
This change breaks the rtmsg_ifinfo() into two parts - one takes the
precise snapshot of the device by called fill_info() before calling
the ndo_uninit() and the second part sends the notification using
collected snapshot.
It was brought to notice when last link is deleted from an ipvlan device
when it has free-ed the port and the subsequent .fill_info() call is
trying to get the info from the port.
kernel: [ 255.139429] ------------[ cut here ]------------
kernel: [ 255.139439] WARNING: CPU: 12 PID: 11173 at net/core/rtnetlink.c:2238 rtmsg_ifinfo+0x100/0x110()
kernel: [ 255.139493] Modules linked in: ipvlan bonding w1_therm ds2482 wire cdc_acm ehci_pci ehci_hcd i2c_dev i2c_i801 i2c_core msr cpuid bnx2x ptp pps_core mdio libcrc32c
kernel: [ 255.139513] CPU: 12 PID: 11173 Comm: ip Not tainted 3.18.0-smp-DEV #167
kernel: [ 255.139514] Hardware name: Intel RML,PCH/Ibis_QC_18, BIOS 1.0.10 05/15/2012
kernel: [ 255.139515] 0000000000000009 ffff880851b6b828 ffffffff815d87f4 00000000000000e0
kernel: [ 255.139516] 0000000000000000 ffff880851b6b868 ffffffff8109c29c 0000000000000000
kernel: [ 255.139518] 00000000ffffffa6 00000000000000d0 ffffffff81aaf580 0000000000000011
kernel: [ 255.139520] Call Trace:
kernel: [ 255.139527] [<ffffffff815d87f4>] dump_stack+0x46/0x58
kernel: [ 255.139531] [<ffffffff8109c29c>] warn_slowpath_common+0x8c/0xc0
kernel: [ 255.139540] [<ffffffff8109c2ea>] warn_slowpath_null+0x1a/0x20
kernel: [ 255.139544] [<ffffffff8150d570>] rtmsg_ifinfo+0x100/0x110
kernel: [ 255.139547] [<ffffffff814f78b5>] rollback_registered_many+0x1d5/0x2d0
kernel: [ 255.139549] [<ffffffff814f79cf>] unregister_netdevice_many+0x1f/0xb0
kernel: [ 255.139551] [<ffffffff8150acab>] rtnl_dellink+0xbb/0x110
kernel: [ 255.139553] [<ffffffff8150da90>] rtnetlink_rcv_msg+0xa0/0x240
kernel: [ 255.139557] [<ffffffff81329283>] ? rhashtable_lookup_compare+0x43/0x80
kernel: [ 255.139558] [<ffffffff8150d9f0>] ? __rtnl_unlock+0x20/0x20
kernel: [ 255.139562] [<ffffffff8152cb11>] netlink_rcv_skb+0xb1/0xc0
kernel: [ 255.139563] [<ffffffff8150a495>] rtnetlink_rcv+0x25/0x40
kernel: [ 255.139565] [<ffffffff8152c398>] netlink_unicast+0x178/0x230
kernel: [ 255.139567] [<ffffffff8152c75f>] netlink_sendmsg+0x30f/0x420
kernel: [ 255.139571] [<ffffffff814e0b0c>] sock_sendmsg+0x9c/0xd0
kernel: [ 255.139575] [<ffffffff811d1d7f>] ? rw_copy_check_uvector+0x6f/0x130
kernel: [ 255.139577] [<ffffffff814e11c9>] ? copy_msghdr_from_user+0x139/0x1b0
kernel: [ 255.139578] [<ffffffff814e1774>] ___sys_sendmsg+0x304/0x310
kernel: [ 255.139581] [<ffffffff81198723>] ? handle_mm_fault+0xca3/0xde0
kernel: [ 255.139585] [<ffffffff811ebc4c>] ? destroy_inode+0x3c/0x70
kernel: [ 255.139589] [<ffffffff8108e6ec>] ? __do_page_fault+0x20c/0x500
kernel: [ 255.139597] [<ffffffff811e8336>] ? dput+0xb6/0x190
kernel: [ 255.139606] [<ffffffff811f05f6>] ? mntput+0x26/0x40
kernel: [ 255.139611] [<ffffffff811d2b94>] ? __fput+0x174/0x1e0
kernel: [ 255.139613] [<ffffffff814e2129>] __sys_sendmsg+0x49/0x90
kernel: [ 255.139615] [<ffffffff814e2182>] SyS_sendmsg+0x12/0x20
kernel: [ 255.139617] [<ffffffff815df092>] system_call_fastpath+0x12/0x17
kernel: [ 255.139619] ---[ end trace 5e6703e87d984f6b ]---
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Reported-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Roopa Prabhu <roopa@cumulusnetworks.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Testing has shown that the pool->sp_lock can be a bottleneck on a busy
server. Every time data is received on a socket, the server must take
that lock in order to dequeue a thread from the sp_threads list.
Address this problem by eliminating the sp_threads list (which contains
threads that are currently idle) and replacing it with a RQ_BUSY flag in
svc_rqst. This allows us to walk the sp_all_threads list under the
rcu_read_lock and find a suitable thread for the xprt by doing a
test_and_set_bit.
Note that we do still have a potential atomicity problem however with
this approach. We don't want svc_xprt_do_enqueue to set the
rqst->rq_xprt pointer unless a test_and_set_bit of RQ_BUSY returned
zero (which indicates that the thread was idle). But, by the time we
check that, the bit could be flipped by a waking thread.
To address this, we acquire a new per-rqst spinlock (rq_lock) and take
that before doing the test_and_set_bit. If that returns false, then we
can set rq_xprt and drop the spinlock. Then, when the thread wakes up,
it must set the bit under the same spinlock and can trust that if it was
already set then the rq_xprt is also properly set.
With this scheme, the case where we have an idle thread no longer needs
to take the highly contended pool->sp_lock at all, and that removes the
bottleneck.
That still leaves one issue: What of the case where we walk the whole
sp_all_threads list and don't find an idle thread? Because the search is
lockess, it's possible for the queueing to race with a thread that is
going to sleep. To address that, we queue the xprt and then search again.
If we find an idle thread at that point, we can't attach the xprt to it
directly since that might race with a different thread waking up and
finding it. All we can do is wake the idle thread back up and let it
attempt to find the now-queued xprt.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Tested-by: Chris Worley <chris.worley@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
In a later patch, we'll be removing some spinlocking around the socket
and thread queueing code in order to fix some contention problems. At
that point, the stats counters will no longer be protected by the
sp_lock.
Change the counters to atomic_long_t fields, except for the
"sockets_queued" counter which will still be manipulated under a
spinlock.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Tested-by: Chris Worley <chris.worley@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
...also make the manipulation of sp_all_threads list use RCU-friendly
functions.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Tested-by: Chris Worley <chris.worley@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
In a later patch, we'll want to be able to handle this flag without
holding the sp_lock. Change this field to an unsigned long flags
field, and declare a new flag in it that can be managed with atomic
bitops.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
There are a couple of holes in the svc_rqst field on x86_64. Move the
rq_cachetype to a different location to eliminate both of them.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
In a later patch, we're going to need some atomic bit flags. Since that
field will need to be an unsigned long, we mitigate that space
consumption by migrating some other bitflags to the new field. Start
with the rq_secure flag.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Highlights include:
Features:
- NFSv4.2 client support for hole punching and preallocation.
- Further RPC/RDMA client improvements.
- Add more RPC transport debugging tracepoints.
- Add RPC debugging tools in debugfs.
Bugfixes:
- Stable fix for layoutget error handling
- Fix a change in COMMIT behaviour resulting from the recent io code updates
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Merge tag 'nfs-for-3.19-1' into nfsd for-3.19 branch
Mainly what I need is 860a0d9e511f "sunrpc: add some tracepoints in
svc_rqst handling functions", which subsequent server rpc patches from
jlayton depend on. I'm merging this later tag on the assumption that's
more likely to be a tested and stable point.
transports need to be able to detect legacy-only
devices (ATM balloon only) to use legacy path
to drive them.
Add a core API to do just that.
The implementation just blacklists balloon:
not too pretty, but let's not over-engineer.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
We have no plans to support virtio 1.0 in balloon driver. Add an
explicit flag to mark it legacy only.
This will be used by follow-up patches.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Guests need to use virtio scsi API, so export it to uapi,
nice to e.g. qemu and will help us remember this file
affects ABI.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Note: for consistency, and to avoid sparse errors,
convert all fields, even those no longer in use
for virtio v1.0.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
virtio-blk has some legacy feature bits that modern drivers
must not negotiate, but are needed for old legacy hosts
(that e.g. don't support virtio-scsi).
Allow a separate legacy feature table for such cases.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
For virtio-1, we can theoretically have a more complex virtqueue
layout with avail and used buffers not on a contiguous memory area
with the descriptor table. For now, it's fine for a transport driver
to stay with the old layout: It needs, however, a way to access
the locations of the avail/used rings so it can register them with
the host.
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
We (ab)use virtio conversion functions for device-specific
config space accesses.
Based on original patches by Cornelia and Rusty.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.com>
virtio 1.0 makes all memory structures LE, so
we need APIs to conditionally do a byteswap on BE
architectures.
To make it easier to check code statically,
add virtio specific types for multi-byte integers
in memory.
Add low level wrappers that do a byteswap conditionally, these will be
useful e.g. for vhost. Add high level wrappers that
query device endian-ness and act accordingly.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Change u32 to u64, and use BIT_ULL and 1ULL everywhere.
Note: transports are unchanged, and only set low 32 bit.
This guarantees that no transport sets e.g. VERSION_1
by mistake without proper support.
Based on patch by Rusty.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
It seemed like a good idea to use bitmap for features
in struct virtio_device, but it's actually a pain,
and seems to become even more painful when we get more
than 32 feature bits. Just change it to a u32 for now.
Based on patch by Rusty.
Suggested-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Add low level APIs to test/set/clear feature bits.
For use by transports, to make it easier to
write code independent of feature bit array format.
Note: APIs is prefixed with __ and has _bit suffix
to stress its low level nature. It's for use by transports only:
drivers should use virtio_has_feature and never need to set/clear
features.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This patch adds a supply regulator to the lp855x platform data to facilitate
powering on/off the 3V rail attached to the controller.
Cc: Stéphane Marchesin <marcheu@chromium.org>
Cc: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Acked-by: Milo Kim <milo.kim@ti.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
include/linux/thermal.h contains definitions for the Thermal generic
netlink family, but none of the valuable information relevant to
user-space such as the Genl family name, multicast group, version or
command set and data types is exported to user-space.
Export all the relevant generic netlink information to user-space to
make this genl family usable by user-space, and while at it, export
THERMAL_NAME_LENGTH since it limits name length for thermal_hwmon
devices.
Kbuild and MAINTAINERS are also updated accordingly to reflect this new
file: include/uapi/linux/thermal.h.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This patch is the usual mix of driver updates (srp, ipr, scsi_debug, NCR5380,
fnic, 53c974, ses, wd719x, hpsa, megaraid_sas). Of those, wd7a9x is new and
53c974 is a rewrite of the old tmscsim driver and the extensive work by Finn
Thain rewrites all the NCR5380 based drivers. There's also extensive
infrastructure updates: a new logging infrastructure for sense information and
a rewrite of the tagged command queue API and an assortment of minor updates.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"This patch is the usual mix of driver updates (srp, ipr, scsi_debug,
NCR5380, fnic, 53c974, ses, wd719x, hpsa, megaraid_sas).
Of those, wd7a9x is new and 53c974 is a rewrite of the old tmscsim
driver and the extensive work by Finn Thain rewrites all the NCR5380
based drivers.
There's also extensive infrastructure updates: a new logging
infrastructure for sense information and a rewrite of the tagged
command queue API and an assortment of minor updates"
* tag 'scsi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (183 commits)
scsi: set fmt to NULL scsi_extd_sense_format() by default
libsas: remove task_collector mode
wd719x: remove dma_cache_sync call
scsi_debug: add Report supported opcodes+tmfs; Compare and write
scsi_debug: change SCSI command parser to table driven
scsi_debug: add Capacity Changed Unit Attention
scsi_debug: append inject error flags onto scsi_cmnd object
scsi_debug: pinpoint invalid field in sense data
wd719x: Add firmware documentation
wd719x: Introduce Western Digital WD7193/7197/7296 PCI SCSI card driver
eeprom-93cx6: Add (read-only) support for 8-bit mode
esas2r: fix an oversight in setting return value
esas2r: fix an error path in esas2r_ioctl_handler
esas2r: fir error handling in do_fm_api
scsi: add SPC-3 command definitions
scsi: rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16
scsi: remove scsi_driver owner field
scsi: move scsi_dispatch_cmd to scsi_lib.c
scsi: stop passing a gfp_mask argument down the command setup path
scsi: remove scsi_next_command
...
performance requirements that were requested by the Gluster
distributed filesystem. Specifically, dm-thinp now takes care to
aggregate IO that will be issued to the same thinp block before
issuing IO to the underlying devices. This really helps improve
performance on HW RAID6 devices that have a writeback cache because it
avoids RMW in the HW RAID controller.
- Some stable fixes: fix leak in DM bufio if integrity profiles were
enabled, use memzero_explicit in DM crypt to avoid any potential for
information leak, and a DM cache fix to properly mark a cache block
dirty if it was promoted to the cache via the overwrite optimization.
- A few simple DM persistent data library fixes
- DM cache multiqueue policy block promotion improvements.
- DM cache discard improvements that take advantage of range
(multiblock) discard support in the DM bio-prison. This allows for
much more efficient bulk discard processing (e.g. when mkfs.xfs
discards the entire device).
- Some small optimizations in DM core and RCU deference cleanups
- DM core changes to suspend/resume code to introduce the new internal
suspend/resume interface that the DM thin-pool target now uses to
suspend/resume active thin devices when the thin-pool must
suspend/resume. This avoids forcing userspace to track all active
thin volumes in a thin-pool when the thin-pool is suspended for the
purposes of metadata or data space resize.
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Merge tag 'dm-3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer:
- Significant DM thin-provisioning performance improvements to meet
performance requirements that were requested by the Gluster
distributed filesystem.
Specifically, dm-thinp now takes care to aggregate IO that will be
issued to the same thinp block before issuing IO to the underlying
devices. This really helps improve performance on HW RAID6 devices
that have a writeback cache because it avoids RMW in the HW RAID
controller.
- Some stable fixes: fix leak in DM bufio if integrity profiles were
enabled, use memzero_explicit in DM crypt to avoid any potential for
information leak, and a DM cache fix to properly mark a cache block
dirty if it was promoted to the cache via the overwrite optimization.
- A few simple DM persistent data library fixes
- DM cache multiqueue policy block promotion improvements.
- DM cache discard improvements that take advantage of range
(multiblock) discard support in the DM bio-prison. This allows for
much more efficient bulk discard processing (e.g. when mkfs.xfs
discards the entire device).
- Some small optimizations in DM core and RCU deference cleanups
- DM core changes to suspend/resume code to introduce the new internal
suspend/resume interface that the DM thin-pool target now uses to
suspend/resume active thin devices when the thin-pool must
suspend/resume.
This avoids forcing userspace to track all active thin volumes in a
thin-pool when the thin-pool is suspended for the purposes of
metadata or data space resize.
* tag 'dm-3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (49 commits)
dm crypt: use memzero_explicit for on-stack buffer
dm space map metadata: fix sm_bootstrap_get_count()
dm space map metadata: fix sm_bootstrap_get_nr_blocks()
dm bufio: fix memleak when using a dm_buffer's inline bio
dm cache: fix spurious cell_defer when dealing with partial block at end of device
dm cache: dirty flag was mistakenly being cleared when promoting via overwrite
dm cache: only use overwrite optimisation for promotion when in writeback mode
dm cache: discard block size must be a multiple of cache block size
dm cache: fix a harmless race when working out if a block is discarded
dm cache: when reloading a discard bitset allow for a different discard block size
dm cache: fix some issues with the new discard range support
dm array: if resizing the array is a noop set the new root to the old one
dm: use rcu_dereference_protected instead of rcu_dereference
dm thin: fix pool_io_hints to avoid looking at max_hw_sectors
dm thin: suspend/resume active thin devices when reloading thin-pool
dm: enhance internal suspend and resume interface
dm thin: do not allow thin device activation while pool is suspended
dm: add presuspend_undo hook to target_type
dm: return earlier from dm_blk_ioctl if target doesn't implement .ioctl
dm thin: remove stale 'trim' message in block comment above pool_message
...
The main thing this time around is support for suspend mode
configuration from DT which will enable some very useful power savings
on systems where we can't rely on the bootloader configuration. We
still don't really support dynamic configuration of this at runtime,
that may come later if there is any demand.
- Support for specifying the target regulation mode and voltage during
system suspend via DT, enabling power savings in that mode.
- Reduce the default verbosity of the logging on boot, improving boot
times especially for systems with very large numbers of regulators.
- Lots of cleanups and fixes for Maxim PMIC drivers.
- New driver for Richtek RT5033.
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Merge tag 'regulator-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator updates from Mark Brown:
"The main thing this time around is support for suspend mode
configuration from DT which will enable some very useful power savings
on systems where we can't rely on the bootloader configuration. We
still don't really support dynamic configuration of this at runtime,
that may come later if there is any demand.
Summary:
- Support for specifying the target regulation mode and voltage
during system suspend via DT, enabling power savings in that mode.
- Reduce the default verbosity of the logging on boot, improving boot
times especially for systems with very large numbers of regulators.
- Lots of cleanups and fixes for Maxim PMIC drivers.
- New driver for Richtek RT5033"
* tag 'regulator-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: (62 commits)
regulator: core: Fix regualtor_ena_gpio_free not to access pin after freeing
regulator: sky81452: Modify Device Tree structure
regulator: sky81452: Modify Device Tree structure
dt-bindings: Update documentation for "system-power-controller" and fix misspellings
of: Rename "poweroff-source" property to "system-power-controller"
regulator: max77686: Remove support for board files
regulator: max77802: Remove support for board files
regulator: max77802: Fill regulator modes translation callback
regulator: max77802: Document binding for regulator operating modes
regulator: of: Add support for parsing initial and suspend modes
regulator: of: Pass the regulator description in the match table
regulator: of: Add regulator desc param to of_get_regulator_init_data()
regulator: Add mode mapping function to struct regulator_desc
regulator: Document binding for initial and suspend modes
regulator: core: Add PRE_DISABLE notification
regulator: gpio: fix parsing of gpio list
regulator: rpm: add support for RPM-controller SMB208
regulator: da9063: Do not transform local IRQ to virtual
regulator: sky81452: Modify dependent Kconfig symbol
regulator: rt5033: Add RT5033 Regulator device driver
...
A couple of new features this time around, nothing that should have any
impact on most users:
- Cleanups and optimization of the path for reading back the register
defaults from the hardware at startup, reducing boot times for
devices that use this (most don't, either populating on demand or
providing defaults).
- A bus implementation for AC'97 devices.
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Merge tag 'regmap-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"A couple of new features this time around, nothing that should have
any impact on most users:
- Cleanups and optimization of the path for reading back the register
defaults from the hardware at startup, reducing boot times for
devices that use this (most don't, either populating on demand or
providing defaults).
- A bus implementation for AC'97 devices"
* tag 'regmap-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: ac97: Add generic AC'97 callbacks
regmap: cache: Sort include headers alphabetically
regmap: cache: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
regmap: cache: use kmalloc_array instead of kmalloc
regmap: cache: speed regcache_hw_init() up.
regmap: cache: fix errno in regcache_hw_init()
regmap: cache: cleanup regcache_hw_init()
regmap: cache: fix errno in regcache_hw_init()
New driver for NCT7802Y
Add support for TMP435, LM95233, LM95235, NCT6792D, and NXP LM75B
Add regulator support for PMBus chips, specifically LTX2978
Add support for humidity sensors to iio-hwmon bridge driver
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Merge tag 'hwmon-for-linus-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
"Notable changes:
- new driver for NCT7802Y
- support for TMP435, LM95233, LM95235, NCT6792D, and NXP LM75B
- regulator support for PMBus chips, specifically LTX2978
- support for humidity sensors to iio-hwmon bridge driver
* tag 'hwmon-for-linus-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (21 commits)
hwmon: (tmp401) Detect TMP435 on all addresses it supports
hwmon: (lm75) Strengthen detect function
hwmon: (gpio-fan) Add a shutdown handler to poweroff the fans
hwmon: (gpio-fan) Allow usage of gpio operations that may sleep
hwmon: (tmp401) Bail out from tmp401_probe() in case of write errors
hwmon: (tmp401) Add support for TI TMP435
hwmon: (lm95234) Add support for LM95233
hwmon: (lm95245) Add support for LM95235
hwmon: (ina2xx) bail-out from ina2xx_probe() in case of configuration errors
hwmon: (nct6775) Add blank lines after declarations
hwmon: (nct6775) Add support for NCT6792D
hwmon: (nct6775) Documentation updates
hwmon: (lm75) Add support for the NXP LM75B
hwmon: Driver for Nuvoton NCT7802Y
hwmon: (ibmpowernv) Convert to module_platform_driver
hwmon: (ibmpowernv) Use platform 'id_table' to probe the device
hwmon: (iio_hwmon) Add support for humidity sensors
hwmon: (ltc2978) Add regulator support
hwmon: (pmbus) Add regulator support
hwmon: (pmbus) add helpers for byte write and read modify write
...
