Pull networking changes from David Miller:
1) Allow to dump, monitor, and change the bridge multicast database
using netlink. From Cong Wang.
2) RFC 5961 TCP blind data injection attack mitigation, from Eric
Dumazet.
3) Networking user namespace support from Eric W. Biederman.
4) tuntap/virtio-net multiqueue support by Jason Wang.
5) Support for checksum offload of encapsulated packets (basically,
tunneled traffic can still be checksummed by HW). From Joseph
Gasparakis.
6) Allow BPF filter access to VLAN tags, from Eric Dumazet and
Daniel Borkmann.
7) Bridge port parameters over netlink and BPDU blocking support
from Stephen Hemminger.
8) Improve data access patterns during inet socket demux by rearranging
socket layout, from Eric Dumazet.
9) TIPC protocol updates and cleanups from Ying Xue, Paul Gortmaker, and
Jon Maloy.
10) Update TCP socket hash sizing to be more in line with current day
realities. The existing heurstics were choosen a decade ago.
From Eric Dumazet.
11) Fix races, queue bloat, and excessive wakeups in ATM and
associated drivers, from Krzysztof Mazur and David Woodhouse.
12) Support DOVE (Distributed Overlay Virtual Ethernet) extensions
in VXLAN driver, from David Stevens.
13) Add "oops_only" mode to netconsole, from Amerigo Wang.
14) Support set and query of VEB/VEPA bridge mode via PF_BRIDGE, also
allow DCB netlink to work on namespaces other than the initial
namespace. From John Fastabend.
15) Support PTP in the Tigon3 driver, from Matt Carlson.
16) tun/vhost zero copy fixes and improvements, plus turn it on
by default, from Michael S. Tsirkin.
17) Support per-association statistics in SCTP, from Michele
Baldessari.
And many, many, driver updates, cleanups, and improvements. Too
numerous to mention individually.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1722 commits)
net/mlx4_en: Add support for destination MAC in steering rules
net/mlx4_en: Use generic etherdevice.h functions.
net: ethtool: Add destination MAC address to flow steering API
bridge: add support of adding and deleting mdb entries
bridge: notify mdb changes via netlink
ndisc: Unexport ndisc_{build,send}_skb().
uapi: add missing netconf.h to export list
pkt_sched: avoid requeues if possible
solos-pci: fix double-free of TX skb in DMA mode
bnx2: Fix accidental reversions.
bna: Driver Version Updated to 3.1.2.1
bna: Firmware update
bna: Add RX State
bna: Rx Page Based Allocation
bna: TX Intr Coalescing Fix
bna: Tx and Rx Optimizations
bna: Code Cleanup and Enhancements
ath9k: check pdata variable before dereferencing it
ath5k: RX timestamp is reported at end of frame
ath9k_htc: RX timestamp is reported at end of frame
...
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Merge tag 'for-linus-20121212' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-mn10300
Pull MN10300 changes from David Howells:
"miscellaneous MN10300 arch patches. I've based it on top of Al Viro's
signal tree - so these patches should be pulled after that."
* tag 'for-linus-20121212' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-mn10300:
MN10300: Use asm-generic/pci_iomap.h
MN10300: Get rid of unused variable from ASB2305 PCI code
MN10300: ASB2305 PCI code needs linux/irq.h
mn10300/mm/fault.c: Port OOM changes to do_page_fault
MN10300: Handle cacheable PCI regions in pci_iomap()
MN10300: fix debug polling in ttySM driver
MN10300: ttySM: clean up unnecessary casting
MN10300: fix SMP synchronization between txdma and serial driver
MN10300: fix serial port vdma irq setup for SMP
MN10300: cleanup IRQ affinity setting
MN10300: ttySM: Use memory barriers correctly in circular buffer logic
Pull big execve/kernel_thread/fork unification series from Al Viro:
"All architectures are converted to new model. Quite a bit of that
stuff is actually shared with architecture trees; in such cases it's
literally shared branch pulled by both, not a cherry-pick.
A lot of ugliness and black magic is gone (-3KLoC total in this one):
- kernel_thread()/kernel_execve()/sys_execve() redesign.
We don't do syscalls from kernel anymore for either kernel_thread()
or kernel_execve():
kernel_thread() is essentially clone(2) with callback run before we
return to userland, the callbacks either never return or do
successful do_execve() before returning.
kernel_execve() is a wrapper for do_execve() - it doesn't need to
do transition to user mode anymore.
As a result kernel_thread() and kernel_execve() are
arch-independent now - they live in kernel/fork.c and fs/exec.c
resp. sys_execve() is also in fs/exec.c and it's completely
architecture-independent.
- daemonize() is gone, along with its parts in fs/*.c
- struct pt_regs * is no longer passed to do_fork/copy_process/
copy_thread/do_execve/search_binary_handler/->load_binary/do_coredump.
- sys_fork()/sys_vfork()/sys_clone() unified; some architectures
still need wrappers (ones with callee-saved registers not saved in
pt_regs on syscall entry), but the main part of those suckers is in
kernel/fork.c now."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (113 commits)
do_coredump(): get rid of pt_regs argument
print_fatal_signal(): get rid of pt_regs argument
ptrace_signal(): get rid of unused arguments
get rid of ptrace_signal_deliver() arguments
new helper: signal_pt_regs()
unify default ptrace_signal_deliver
flagday: kill pt_regs argument of do_fork()
death to idle_regs()
don't pass regs to copy_process()
flagday: don't pass regs to copy_thread()
bfin: switch to generic vfork, get rid of pointless wrappers
xtensa: switch to generic clone()
openrisc: switch to use of generic fork and clone
unicore32: switch to generic clone(2)
score: switch to generic fork/vfork/clone
c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone()
take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h
mn10300: switch to generic fork/vfork/clone
h8300: switch to generic fork/vfork/clone
tile: switch to generic clone()
...
Conflicts:
arch/microblaze/include/asm/Kbuild
This branch contains a set of various board updates for ARM platforms.
A few shmobile platforms that are stale have been removed, some
defconfig updates for various boards selecting new features such as
pinctrl subsystem support, and various updates enabling peripherals, etc.
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Merge tag 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC board updates from Olof Johansson:
"This branch contains a set of various board updates for ARM platforms.
A few shmobile platforms that are stale have been removed, some
defconfig updates for various boards selecting new features such as
pinctrl subsystem support, and various updates enabling peripherals,
etc."
Fix up conflicts mostly as per Olof.
* tag 'boards' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (58 commits)
ARM: S3C64XX: Add dummy supplies for Glenfarclas LDOs
ARM: S3C64XX: Add registration of WM2200 Bells device on Cragganmore
ARM: kirkwood: Add Plat'Home OpenBlocks A6 support
ARM: Dove: update defconfig
ARM: Kirkwood: update defconfig for new boards
arm: orion5x: add DT related options in defconfig
arm: orion5x: convert 'LaCie Ethernet Disk mini v2' to Device Tree
arm: orion5x: basic Device Tree support
arm: orion5x: mechanical defconfig update
ARM: kirkwood: Add support for the MPL CEC4
arm: kirkwood: add support for ZyXEL NSA310
ARM: Kirkwood: new board USI Topkick
ARM: kirkwood: use gpio-fan DT binding on lsxl
ARM: Kirkwood: add Netspace boards to defconfig
ARM: kirkwood: DT board setup for Network Space Mini v2
ARM: kirkwood: DT board setup for Network Space Lite v2
ARM: kirkwood: DT board setup for Network Space v2 and parents
leds: leds-ns2: add device tree binding
ARM: Kirkwood: Enable the second I2C bus
ARM: mmp: select pinctrl driver
...
This contains the bulk of new SoC development for this merge window.
Two new platforms have been added, the sunxi platforms (Allwinner A1x
SoCs) by Maxime Ripard, and a generic Broadcom platform for a new
series of ARMv7 platforms from them, where the hope is that we can
keep the platform code generic enough to have them all share one mach
directory. The new Broadcom platform is contributed by Christian Daudt.
Highbank has grown support for Calxeda's next generation of hardware,
ECX-2000.
clps711x has seen a lot of cleanup from Alexander Shiyan, and he's also
taken on maintainership of the platform.
Beyond this there has been a bunch of work from a number of people on
converting more platforms to IRQ domains, pinctrl conversion, cleanup
and general feature enablement across most of the active platforms.
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Merge tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC updates from Olof Johansson:
"This contains the bulk of new SoC development for this merge window.
Two new platforms have been added, the sunxi platforms (Allwinner A1x
SoCs) by Maxime Ripard, and a generic Broadcom platform for a new
series of ARMv7 platforms from them, where the hope is that we can
keep the platform code generic enough to have them all share one mach
directory. The new Broadcom platform is contributed by Christian
Daudt.
Highbank has grown support for Calxeda's next generation of hardware,
ECX-2000.
clps711x has seen a lot of cleanup from Alexander Shiyan, and he's
also taken on maintainership of the platform.
Beyond this there has been a bunch of work from a number of people on
converting more platforms to IRQ domains, pinctrl conversion, cleanup
and general feature enablement across most of the active platforms."
Fix up trivial conflicts as per Olof.
* tag 'soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (174 commits)
mfd: vexpress-sysreg: Remove LEDs code
irqchip: irq-sunxi: Add terminating entry for sunxi_irq_dt_ids
clocksource: sunxi_timer: Add terminating entry for sunxi_timer_dt_ids
irq: versatile: delete dangling variable
ARM: sunxi: add missing include for mdelay()
ARM: EXYNOS: Avoid early use of of_machine_is_compatible()
ARM: dts: add node for PL330 MDMA1 controller for exynos4
ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
ARM: EXYNOS: add UART3 to DEBUG_LL ports
ARM: S3C24XX: Add clkdev entry for camif-upll clock
ARM: SAMSUNG: Add s3c24xx/s3c64xx CAMIF GPIO setup helpers
ARM: sunxi: Add missing sun4i.dtsi file
pinctrl: samsung: Do not initialise statics to 0
ARM i.MX6: remove gate_mask from pllv3
ARM i.MX6: Fix ethernet PLL clocks
ARM i.MX6: rename PLLs according to datasheet
ARM i.MX6: Add pwm support
ARM i.MX51: Add pwm support
ARM i.MX53: Add pwm support
ARM: mx5: Replace clk_register_clkdev with clock DT lookup
...
Cleanup patches for various ARM platforms and some of their associated
drivers. There's also a branch in here that enables Freescale i.MX to be
part of the multiplatform support -- the first "big" SoC that is moved
over (more multiplatform work comes in a separate branch later during
the merge window).
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Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups on various subarchitectures from Olof Johansson:
"Cleanup patches for various ARM platforms and some of their associated
drivers. There's also a branch in here that enables Freescale i.MX to
be part of the multiplatform support -- the first "big" SoC that is
moved over (more multiplatform work comes in a separate branch later
during the merge window)."
Conflicts fixed as per Olof, including a silent semantic one in
arch/arm/mach-omap2/board-generic.c (omap_prcm_restart() was renamed to
omap3xxx_restart(), and a new user of the old name was added).
* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (189 commits)
ARM: omap: fix typo on timer cleanup
ARM: EXYNOS: Remove unused regs-mem.h file
ARM: EXYNOS: Remove unused non-dt support for dwmci controller
ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan
ARM: OMAP3: cm-t3517: use GPTIMER for system clock
ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER
ARM: SAMSUNG: use devm_ functions for ADC driver
ARM: EXYNOS: no duplicate mask/unmask in eint0_15
ARM: S3C24XX: SPI clock channel setup is fixed for S3C2443
ARM: EXYNOS: Remove i2c0 resource information and setting of device names
ARM: Kirkwood: checkpatch cleanups
ARM: Kirkwood: Fix sparse warnings.
ARM: Kirkwood: Remove unused includes
ARM: kirkwood: cleanup lsxl board includes
ARM: integrator: use BUG_ON where possible
ARM: integrator: push down SC dependencies
ARM: integrator: delete static UART1 mapping
ARM: integrator: delete SC mapping on the CP
ARM: integrator: remove static CP syscon mapping
ARM: integrator: remove static AP syscon mapping
...
This is a collection of header file cleanups, mostly for OMAP and AT91,
that keeps moving the platforms in the direction of multiplatform by
removing the need for mach-dependent header files used in drivers and
other places.
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Merge tag 'headers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC Header cleanups from Olof Johansson:
"This is a collection of header file cleanups, mostly for OMAP and
AT91, that keeps moving the platforms in the direction of
multiplatform by removing the need for mach-dependent header files
used in drivers and other places."
Fix up mostly trivial conflicts as per Olof.
* tag 'headers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (106 commits)
ARM: OMAP2+: Move iommu/iovmm headers to platform_data
ARM: OMAP2+: Make some definitions local
ARM: OMAP2+: Move iommu2 to drivers/iommu/omap-iommu2.c
ARM: OMAP2+: Move plat/iovmm.h to include/linux/omap-iommu.h
ARM: OMAP2+: Move iopgtable header to drivers/iommu/
ARM: OMAP: Merge iommu2.h into iommu.h
atmel: move ATMEL_MAX_UART to platform_data/atmel.h
ARM: OMAP: Remove omap_init_consistent_dma_size()
arm: at91: move at91rm9200 rtc header in drivers/rtc
arm: at91: move reset controller header to arm/arm/mach-at91
arm: at91: move pit define to the driver
arm: at91: move at91_shdwc.h to arch/arm/mach-at91
arm: at91: move board header to arch/arm/mach-at91
arn: at91: move at91_tc.h to arch/arm/mach-at91
arm: at91 move at91_aic.h to arch/arm/mach-at91
arm: at91 move board.h to arch/arm/mach-at91
arm: at91: move platfarm_data to include/linux/platform_data/atmel.h
arm: at91: drop machine defconfig
ARM: OMAP: Remove NEED_MACH_GPIO_H
ARM: OMAP: Remove unnecessary mach and plat includes
...
Simple bug fixes that were not considered important enough for inclusion
into 3.7, especially those that arrived late during the merge window.
There's also a MAINTAINERS update for the Renesas platforms in here,
marking Simon Horman as a maintainer and changing the git url to his tree.
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Merge tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC Non-critical bug fixes from Olof Johansson:
"Simple bug fixes that were not considered important enough for
inclusion into 3.7, especially those that arrived late during the
merge window.
There's also a MAINTAINERS update for the Renesas platforms in here,
marking Simon Horman as a maintainer and changing the git url to his
tree."
* tag 'fixes-non-critical' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
Update ARM/SHMOBILE section of MAINTAINERS
ARM: Fix Kconfig symbols typo for LEDS
ARM: pxa: add dummy SA1100 rtc clock in pxa25x
ARM: pxa: fix pxa25x gpio wakeup setting
ARM: OMAP4: PM: fix errata handling when CONFIG_PM=n
ARM: cns3xxx: drop unnecessary symbol selection
ARM: vexpress: fix ll debug code when building multiplatform
ARM: OMAP4: retrigger localtimers after re-enabling gic
ARM: OMAP4460: Workaround for ROM bug because of CA9 r2pX GIC control register change.
ARM: OMAP4: PM: add errata support
ARM: davinci: fix return value check by using IS_ERR in tnetv107x_devices_init()
ARM: davinci: uncompress.h: bail out if uart not initialized
ARM: davinci: serial.h: fix uart number in the comment
ARM: davinci: dm644x evm: move pointer dereference below NULL check
ARM: vexpress: Make the debug UART detection more specific
Pull ARM updates from Russell King:
"Here's the updates for ARM for this merge window, which cover quite a
variety of areas.
There's a bunch of patch series from Will tackling various bugs like
the PROT_NONE handling, ASID allocation, cluster boot protocol and
ASID TLB tagging updates.
We move to a build-time sorted exception table rather than doing the
sorting at run-time, add support for the secure computing filter, and
some updates to the perf code. We also have sorted out the placement
of some headers, fixed some build warnings, fixed some hotplug
problems with the per-cpu TWD code."
* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (73 commits)
ARM: 7594/1: Add .smp entry for REALVIEW_EB
ARM: 7599/1: head: Remove boot-time HYP mode check for v5 and below
ARM: 7598/1: net: bpf_jit_32: fix sp-relative load/stores offsets.
ARM: 7595/1: syscall: rework ordering in syscall_trace_exit
ARM: 7596/1: mmci: replace readsl/writesl with ioread32_rep/iowrite32_rep
ARM: 7597/1: net: bpf_jit_32: fix kzalloc gfp/size mismatch.
ARM: 7593/1: nommu: do not enable DCACHE_WORD_ACCESS when !CONFIG_MMU
ARM: 7592/1: nommu: prevent generation of kernel unaligned memory accesses
ARM: 7591/1: nommu: Enable the strict alignment (CR_A) bit only if ARCH < v6
ARM: 7590/1: /proc/interrupts: limit the display of IPIs to online CPUs only
ARM: 7587/1: implement optimized percpu variable access
ARM: 7589/1: integrator: pass the lm resource to amba
ARM: 7588/1: amba: create a resource parent registrator
ARM: 7582/2: rename kvm_seq to vmalloc_seq so to avoid confusion with KVM
ARM: 7585/1: kernel: fix nr_cpu_ids check in DT logical map init
ARM: 7584/1: perf: fix link error when CONFIG_HW_PERF_EVENTS is not selected
ARM: gic: use a private mapping for CPU target interfaces
ARM: kernel: add logical mappings look-up
ARM: kernel: add cpu logical map DT init in setup_arch
ARM: kernel: add device tree init map function
...
Implement destination MAC rule extension for L3/L4 rules in
flow steering. Usefull for vSwitch/macvlan configurations.
Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Get rid of full_mac, zero_mac in favour of
is_zero_ether_addr and is_broadcast_ether_addr.
Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add ability to specify destination MAC address for L3/L4 flow spec
in order to be able to specify action for different VM's under vSwitch
configuration. This change is transparent to older userspace.
Signed-off-by: Yan Burman <yanb@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch implents adding/deleting mdb entries via netlink.
Currently all entries are temp, we probably need a flag to distinguish
permanent entries too.
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As Stephen mentioned, we need to monitor the mdb
changes in user-space, so add notifications via netlink too.
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Graf <tgraf@suug.ch>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
These symbols were exported for bonding device by commit 305d552a
("bonding: send IPv6 neighbor advertisement on failover").
It bacame obsolete by commit 7c899432 ("bonding, ipv4, ipv6, vlan: Handle
NETDEV_BONDING_FAILOVER like NETDEV_NOTIFY_PEERS") and removed by
commit 4f5762ec ("bonding: Remove obsolete source file 'bond_ipv6.c'").
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add netconf.h for use by iproute2.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull CIFS fixes from Steve French:
"This includes a set of misc. cifs fixes (most importantly some byte
range lock related write fixes from Pavel, and some ACL and idmap
related fixes from Jeff) but also includes the SMB2.02 dialect
enablement, and a key fix for SMB3 mounts.
Default authentication upgraded to ntlmv2 for cifs (it was already
ntlmv2 for smb2)"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6: (43 commits)
CIFS: Fix write after setting a read lock for read oplock files
cifs: parse the device name into UNC and prepath
cifs: fix up handling of prefixpath= option
cifs: clean up handling of unc= option
cifs: fix SID binary to string conversion
fix "disabling echoes and oplocks" on SMB2 mounts
Do not send SMB2 signatures for SMB3 frames
cifs: deal with id_to_sid embedded sid reply corner case
cifs: fix hardcoded default security descriptor length
cifs: extra sanity checking for cifs.idmap keys
cifs: avoid extra allocation for small cifs.idmap keys
cifs: simplify id_to_sid and sid_to_id mapping code
CIFS: Fix possible data coherency problem after oplock break to None
CIFS: Do not permit write to a range mandatory locked with a read lock
cifs: rename cifs_readdir_lookup to cifs_prime_dcache and make it void return
cifs: Add CONFIG_CIFS_DEBUG and rename use of CIFS_DEBUG
cifs: Make CIFS_DEBUG possible to undefine
SMB3 mounts fail with access denied to some servers
cifs: Remove unused cEVENT macro
cifs: always zero out smb_vol before parsing options
...
- remove the xfssyncd mess
- only update the last_sync_lsn when a transaction completes
- zero allocation_args on the kernel stack
- fix AGF/alloc workqueue deadlock
- silence uninitialised f.file warning
- Update inode alloc comments
- Update mount options documentation
- report projid32bit feature in geometry call
- speculative preallocation inode tracking
- fix attr tree double split corruption
- fix broken error handling in xfs_vm_writepage
- drop buffer io reference when a bad bio is built
- add more attribute tree trace points
- growfs infrastructure changes for 3.8
- fs/xfs/xfs_fs_subr.c die die die
- add CRC infrastructure
- add CRC checks to the log
- Remove description of nodelaylog mount option from xfs.txt
- inode allocation should use unmapped buffers
- byte range granularity for XFS_IOC_ZERO_RANGE
- fix direct IO nested transaction deadlock
- fix stray dquot unlock when reclaiming dquots
- fix sparse reported log CRC endian issue
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Merge tag 'for-linus-v3.8-rc1' of git://oss.sgi.com/xfs/xfs
Pull xfs update from Ben Myers:
"There is plenty going on, including the cleanup of xfssyncd, metadata
verifiers, CRC infrastructure for the log, tracking of inodes with
speculative allocation, a cleanup of xfs_fs_subr.c, fixes for
XFS_IOC_ZERO_RANGE, and important fix related to log replay (only
update the last_sync_lsn when a transaction completes), a fix for
deadlock on AGF buffers, documentation and comment updates, and a few
more cleanups and fixes.
Details:
- remove the xfssyncd mess
- only update the last_sync_lsn when a transaction completes
- zero allocation_args on the kernel stack
- fix AGF/alloc workqueue deadlock
- silence uninitialised f.file warning
- Update inode alloc comments
- Update mount options documentation
- report projid32bit feature in geometry call
- speculative preallocation inode tracking
- fix attr tree double split corruption
- fix broken error handling in xfs_vm_writepage
- drop buffer io reference when a bad bio is built
- add more attribute tree trace points
- growfs infrastructure changes for 3.8
- fs/xfs/xfs_fs_subr.c die die die
- add CRC infrastructure
- add CRC checks to the log
- Remove description of nodelaylog mount option from xfs.txt
- inode allocation should use unmapped buffers
- byte range granularity for XFS_IOC_ZERO_RANGE
- fix direct IO nested transaction deadlock
- fix stray dquot unlock when reclaiming dquots
- fix sparse reported log CRC endian issue"
Fix up trivial conflict in fs/xfs/xfs_fsops.c due to the same patch
having been applied twice (commits eaef854335 and 1375cb65e8: "xfs:
growfs: don't read garbage for new secondary superblocks") with later
updates to the affected code in the XFS tree.
* tag 'for-linus-v3.8-rc1' of git://oss.sgi.com/xfs/xfs: (78 commits)
xfs: fix sparse reported log CRC endian issue
xfs: fix stray dquot unlock when reclaiming dquots
xfs: fix direct IO nested transaction deadlock.
xfs: byte range granularity for XFS_IOC_ZERO_RANGE
xfs: inode allocation should use unmapped buffers.
xfs: Remove the description of nodelaylog mount option from xfs.txt
xfs: add CRC checks to the log
xfs: add CRC infrastructure
xfs: convert buffer verifiers to an ops structure.
xfs: connect up write verifiers to new buffers
xfs: add pre-write metadata buffer verifier callbacks
xfs: add buffer pre-write callback
xfs: Add verifiers to dir2 data readahead.
xfs: add xfs_da_node verification
xfs: factor and verify attr leaf reads
xfs: factor dir2 leaf read
xfs: factor out dir2 data block reading
xfs: factor dir2 free block reading
xfs: verify dir2 block format buffers
xfs: factor dir2 block read operations
...
This set fixes some conditions in which value blocks are invalidated,
and includes two trivial cleanups.
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Merge tag 'dlm-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm updates from David Teigland:
"This set fixes some conditions in which value blocks are invalidated,
and includes two trivial cleanups."
* tag 'dlm-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm:
dlm: fix lvb invalidation conditions
fs/dlm: remove CONFIG_EXPERIMENTAL
dlm: remove unused variable in *dlm_lowcomms_get_buffer()
Pull cgroup changes from Tejun Heo:
"A lot of activities on cgroup side. The big changes are focused on
making cgroup hierarchy handling saner.
- cgroup_rmdir() had peculiar semantics - it allowed cgroup
destruction to be vetoed by individual controllers and tried to
drain refcnt synchronously. The vetoing never worked properly and
caused good deal of contortions in cgroup. memcg was the last
reamining user. Michal Hocko removed the usage and cgroup_rmdir()
path has been simplified significantly. This was done in a
separate branch so that the memcg people can base further memcg
changes on top.
- The above allowed cleaning up cgroup lifecycle management and
implementation of generic cgroup iterators which are used to
improve hierarchy support.
- cgroup_freezer updated to allow migration in and out of a frozen
cgroup and handle hierarchy. If a cgroup is frozen, all descendant
cgroups are frozen.
- netcls_cgroup and netprio_cgroup updated to handle hierarchy
properly.
- Various fixes and cleanups.
- Two merge commits. One to pull in memcg and rmdir cleanups (needed
to build iterators). The other pulled in cgroup/for-3.7-fixes for
device_cgroup fixes so that further device_cgroup patches can be
stacked on top."
Fixed up a trivial conflict in mm/memcontrol.c as per Tejun (due to
commit bea8c150a7 ("memcg: fix hotplugged memory zone oops") in master
touching code close to commit 2ef37d3fe4 ("memcg: Simplify
mem_cgroup_force_empty_list error handling") in for-3.8)
* 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (65 commits)
cgroup: update Documentation/cgroups/00-INDEX
cgroup_rm_file: don't delete the uncreated files
cgroup: remove subsystem files when remounting cgroup
cgroup: use cgroup_addrm_files() in cgroup_clear_directory()
cgroup: warn about broken hierarchies only after css_online
cgroup: list_del_init() on removed events
cgroup: fix lockdep warning for event_control
cgroup: move list add after list head initilization
netprio_cgroup: allow nesting and inherit config on cgroup creation
netprio_cgroup: implement netprio[_set]_prio() helpers
netprio_cgroup: use cgroup->id instead of cgroup_netprio_state->prioidx
netprio_cgroup: reimplement priomap expansion
netprio_cgroup: shorten variable names in extend_netdev_table()
netprio_cgroup: simplify write_priomap()
netcls_cgroup: move config inheritance to ->css_online() and remove .broken_hierarchy marking
cgroup: remove obsolete guarantee from cgroup_task_migrate.
cgroup: add cgroup->id
cgroup, cpuset: remove cgroup_subsys->post_clone()
cgroup: s/CGRP_CLONE_CHILDREN/CGRP_CPUSET_CLONE_CHILDREN/
cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()
...
Pull percpu changes from Tejun Heo:
"Nothing exciting here either. Joonsoo's is almost cosmetic. Cyrill's
patch fixes "percpu_alloc" early kernel param handling so that the
kernel doesn't crash when the parameter is specified w/o any argument."
* 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
mm, percpu: Make sure percpu_alloc early parameter has an argument
percpu: make pcpu_free_chunk() use pcpu_mem_free() instead of kfree()
Pull workqueue changes from Tejun Heo:
"Nothing exciting. Just two trivial changes."
* 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: add WARN_ON_ONCE() on CPU number to wq_worker_waking_up()
workqueue: trivial fix for return statement in work_busy()
Pull thermal management update from Zhang Rui:
"Highlights:
- Introduction of thermal policy support, together with three new
thermal governors, including step_wise, user_space, fire_share.
- Introduction of ST-Ericsson db8500_thermal driver and ST-Ericsson
db8500_cpufreq_cooling driver.
- Thermal Kconfig file and Makefile refactor.
- Fixes for generic thermal layer, generic cpucooling, rcar thermal
driver and Exynos thermal driver."
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (36 commits)
Thermal: Fix DEFAULT_THERMAL_GOVERNOR
Thermal: fix a NULL pointer dereference when generic thermal layer is built as a module
thermal: rcar: add rcar_zone_to_priv() macro
thermal: rcar: fixup the unit of temperature
thermal: cpu cooling: allow module builds
thermal: cpu cooling: use const parameter while registering
Thermal: Add ST-Ericsson DB8500 thermal properties and platform data.
Thermal: Add ST-Ericsson DB8500 thermal driver.
drivers/thermal/Makefile refactor
Exynos: Add missing dependency
Refactor drivers/thermal/Kconfig
thermal: cpu_cooling: Make 'notify_device' static
Thermal: Remove the cooling_cpufreq_list.
Thermal: fix bug of counting cpu frequencies.
Thermal: add indent for code alignment.
thermal: rcar_thermal: remove explicitly used devm_kfree/iounap()
thermal: user_space: Add missing static storage class specifiers
thermal: fair_share: Add missing static storage class specifiers
thermal: step_wise: Add missing static storage class specifiers
Thermal: Fix oops and unlocking in thermal_sys.c
...
Quite a few enhancements this time around, helpers and diagnostics for
the most part which is good to see:
- Addition of table based lookups for the register access checks from
Davide Ciminaghi, making life easier for drivers with big blocks of
similar registers.
- Allow drivers to get the irqdomain for regmap irq_chips, allowing the
domain to be used with other APIs.
- Debug improvements for paged register maps.
- Performance improvments for some of the diagnostic infrastructure,
very helpful for devices with large register maps.
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Merge tag 'regmap-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"Quite a few enhancements this time around, helpers and diagnostics for
the most part which is good to see:
- Addition of table based lookups for the register access checks from
Davide Ciminaghi, making life easier for drivers with big blocks of
similar registers.
- Allow drivers to get the irqdomain for regmap irq_chips, allowing
the domain to be used with other APIs.
- Debug improvements for paged register maps.
- Performance improvments for some of the diagnostic infrastructure,
very helpful for devices with large register maps."
* tag 'regmap-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: debugfs: Cache offsets of valid regions for dump
regmap: debugfs: Factor out initial seek
regmap: debugfs: Avoid overflows for very small reads
regmap: Cache register and value sizes for debugfs
regmap: introduce tables for readable/writeable/volatile/precious checks
regmap: core: Report registers in hex when we can't cache
regmap: Fix printing of size_t variable
regmap: make lock/unlock functions customizable
regmap: silence GCC warning
regmap: Split raw writes that cross window boundaries
regmap: Make return code checks consistent
regmap: Factor range lookup out of page selection
regmap: Provide debugfs read of register ranges
regmap: Factor out debugfs register read
regmap: Allow ranges to be named
regmap: When we sanity check during range adds say what errors we find
regmap: Rename n_ranges to num_ranges
regmap: irq: Allow users to retrieve the irq_domain
to hold multiple records.
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Merge tag 'please-pull-pstore_mevent' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull pstore fixes from Tony Luck:
"Patch series to allow EFI variable backend to pstore to hold multiple
records."
* tag 'please-pull-pstore_mevent' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
efi_pstore: Add a format check for an existing variable name at erasing time
efi_pstore: Add a format check for an existing variable name at reading time
efi_pstore: Add a sequence counter to a variable name
efi_pstore: Add ctime to argument of erase callback
efi_pstore: Remove a logic erasing entries from a write callback to hold multiple logs
efi_pstore: Add a logic erasing entries to an erase callback
efi_pstore: Check remaining space with QueryVariableInfo() before writing data
namespace collision from other work being merged.
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Merge tag 'please-pull-misc-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull ia64 fix from Tony Luck:
"Miscellaneous ia64 fix for 3.8. Just need to avoid a pending
namespace collision from other work being merged."
* tag 'please-pull-misc-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
[IA64] Resolve name space collision for cache_show()
- Generic execve, kernel_thread, fork/vfork/clone.
- Preparatory patches for KVM support (initialising EL2 mode for later
installing KVM support, hypervisor stub).
- Signal handling corner case fix (alternative signal stack set up for a
SEGV handler, which is raised in response to RLIMIT_STACK being
reached).
- Sub-nanosecond timer error fix.
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Merge tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64
Pull ARM64 updates from Catalin Marinas:
- Generic execve, kernel_thread, fork/vfork/clone.
- Preparatory patches for KVM support (initialising EL2 mode for later
installing KVM support, hypervisor stub).
- Signal handling corner case fix (alternative signal stack set up for
a SEGV handler, which is raised in response to RLIMIT_STACK being
reached).
- Sub-nanosecond timer error fix.
* tag 'arm64-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: (30 commits)
arm64: Update the MAINTAINERS entry
arm64: compat for clock_adjtime(2) is miswired
arm64: move FP-SIMD save/restore code to a macro
arm64: hyp: initialize vttbr_el2 to zero
arm64: add hypervisor stub
arm64: record boot mode when entering the kernel
arm64: move vector entry macro to assembler.h
arm64: add AArch32 execution modes to ptrace.h
arm64: expand register mapping between AArch32 and AArch64
arm64: generic timer: use virtual counter instead of physical at EL0
arm64: vdso: defer shifting of nanosecond component of timespec
arm64: vdso: rework __do_get_tspec register allocation and return shift
arm64: vdso: check sequence counter even for coarse realtime operations
arm64: vdso: fix clocksource mask when extracting bottom 56 bits
ARM64: Remove incorrect Kconfig symbol HAVE_SPARSE_IRQ
Documentation: Fixes a word in Documentation/arm64/memory.txt
arm64: Make !dirty ptes read-only
arm64: Convert empty flush_cache_{mm,page} functions to static inline
arm64: signal: let the compiler inline compat_get_sigframe
arm64: signal: return struct rt_sigframe from get_sigframe
...
Conflicts:
arch/arm64/include/asm/unistd32.h
The declarations from MN10300's pci_iomap() was removed by commit
34f1bdee19 but asm-generic/pci_iomap.h wasn't
then #included from asm/io.h.
Signed-off-by: David Howells <dhowells@redhat.com>
Get rid of an unused variable in pcibios_fixup_device_resources() which leads
to the following warning:
arch/mn10300/unit-asb2305/pci.c: In function 'pcibios_fixup_device_resources':
arch/mn10300/unit-asb2305/pci.c:324:24: warning: unused variable 'region' [-Wunused-variable]
Whilst we're at it, merge the two integer variable declarations into one line.
Signed-off-by: David Howells <dhowells@redhat.com>
ASB2305 PCI code needs to #include linux/irq.h for XIRQ1 so that it can set
the CPU interrupt priority level on the PCI interrupt.
Signed-off-by: David Howells <dhowells@redhat.com>
Commit d065bd810b
(mm: retry page fault when blocking on disk transfer) and
commit 37b23e0525
(x86,mm: make pagefault killable)
The above commits introduced changes into the x86 pagefault handler
for making the page fault handler retryable as well as killable.
These changes reduce the mmap_sem hold time, which is crucial
during OOM killer invocation.
Port these changes to mn10300.
Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Handle cacheable PCI regions in pci_iomap(). If IORESOURCE_CACHEABLE is set
then we AND away the 0x20000000 "flag".
Signed-off-by: David Howells <dhowells@redhat.com>
The debug polling interface for the SoC serial ports did not work in the case
where the serial ports were not also used as a console. In that case, the
uart driver startup function will not be called so tx and rx would not be
enabled in the hardware control register. Also, vdma interrupts would not be
enabled which the poll_get_char function relied on. This patch makes sure that
the rx and tx enables are set as a consequence of the uart set_termios call
which is the only initialization done for the debug polling interface. Also,
the poll_get_char now handles the case where vdma interrupts are not enabled.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
The ttySM uart data register pointers are declared as void* pointers. Change
them to u8* pointers so we don't need to use casts in the code.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
The SoC serial port driver uses a high priority interrupt to handle tx of
characters in the tx ring buffer. The driver needs to disable/enable this IRQ
from outside of irq context. The original code to do this is not foolproof on
SMP machines because the IRQ running on one core could still access the serial
port for a short time after the driver running on another core disables the
interrupt. This patch adds a flag to tell the IRQ handler that the driver
wants to disable the interrupt. After seeing the flag, the IRQ handler will
immediately disable the interrupt and exit. After setting the flag, the driver
will wait for interrupt to be disabled by the IRQ handler.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
The builtin SoC serial ports have no FIFOs and use a virtual DMA mechanism
based on high priority IRQs to avoid overruns. These high priority interrupts
are pinned to cpu#0 on SMP systems. This patch fixes a problem with SMP where
the set_intr_level() interface is used to set the priority for these IRQs. The
set_intr_level() function sets priority on the local cpu but on SMP systems,
this code may be run on some other cpu than the one handling the interrupts.
Instead of setting interrupt level explicitly, this patch uses a special
irq_chip for these interrupts so that the mask/unmask methods can set the
interrupt level implicitly.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
The irq_set_affinity handler for the mn10300 cpu pic had some hard-coded IRQs
which were not to be migrated from one cpu to another. This patch cleans those
up by using a combination of IRQF_NOBALANCING and specialized irq chips with
no irq_set_affinity handler. This maintains the previous behavior by using
generic IRQ interfaces rather than hard coding IRQ numbers in the default
irq_set_affinity handler.
Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Use memory barriers correctly in the circular buffer logic used in the driver,
as documented in Documentation/circular-buffers.txt.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Pull ARM OMAP serial updates from Russell King:
"This series is a major reworking of the OMAP serial driver code fixing
various bugs in the hardware-assisted flow control, extending up into
serial_core for a couple of issues. These fixes have been done as a
set of progressive changes and transformations in the hope that no new
bugs will be introduced by this series.
The problems are many-fold, from the driver not being informed about
updated settings, to the driver not knowing what the intentions of the
upper layers are.
The first four patches tackle the serial_core layer, allowing it to
provide the necessary information to drivers, and the remaining
patches allow the OMAP serial driver to take advantage of this.
This brings hardware assisted RTS/CTS and XON/OFF flow control into a
useful state.
These patches have been in linux-next for most of the last cycle;
indeed they predate the previous merge window. They've also been
posted to the OMAP people."
* 'omap-serial' of git://git.linaro.org/people/rmk/linux-arm: (21 commits)
SERIAL: omap: fix hardware assisted flow control
SERIAL: omap: simplify (2)
SERIAL: omap: move xon/xoff setting earlier
SERIAL: omap: always set TCR
SERIAL: omap: simplify
SERIAL: omap: don't read back LCR/MCR/EFR
SERIAL: omap: serial_omap_configure_xonxoff() contents into set_termios
SERIAL: omap: configure xon/xoff before setting modem control lines
SERIAL: omap: remove OMAP_UART_SYSC_RESET and OMAP_UART_FIFO_CLR
SERIAL: omap: move driver private definitions and structures to driver
SERIAL: omap: remove 'irq_pending' bitfield
SERIAL: omap: fix MCR TCRTLR bit handling
SERIAL: omap: fix set_mctrl() breakage
SERIAL: omap: no need to re-read EFR
SERIAL: omap: remove setting of EFR SCD bit
SERIAL: omap: allow hardware assisted IXANY mode to be disabled
SERIAL: omap: allow hardware assisted rts/cts modes to be disabled
SERIAL: core: add throttle/unthrottle callbacks for hardware assisted flow control
SERIAL: core: add hardware assisted h/w flow control support
SERIAL: core: add hardware assisted s/w flow control support
...
Conflicts:
drivers/tty/serial/omap-serial.c
With BQL being deployed, we can more likely have following behavior :
We dequeue a packet from qdisc in dequeue_skb(), then we realize target
tx queue is in XOFF state in sch_direct_xmit(), and we have to hold the
skb into gso_skb for later.
This shows in stats (tc -s qdisc dev eth0) as requeues.
Problem of these requeues is that high priority packets can not be
dequeued as long as this (possibly low prio and big TSO packet) is not
removed from gso_skb.
At 1Gbps speed, a full size TSO packet is 500 us of extra latency.
In some cases, we know that all packets dequeued from a qdisc are
for a particular and known txq :
- If device is non multi queue
- For all MQ/MQPRIO slave qdiscs
This patch introduces a new qdisc flag, TCQ_F_ONETXQUEUE to mark
this capability, so that dequeue_skb() is allowed to dequeue a packet
only if the associated txq is not stopped.
This indeed reduce latencies for high prio packets (or improve fairness
with sfq/fq_codel), and almost remove qdisc 'requeues'.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We weren't clearing card->tx_skb[port] when processing the TX done interrupt.
If there wasn't another skb ready to transmit immediately, this led to a
double-free because we'd free it *again* next time we did have a packet to
send.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull x86 timer update from Ingo Molnar:
"This tree includes HPET fixes and also implements a calibration-free,
TSC match driven APIC timer interrupt mode: 'TSC deadline mode'
supported in SandyBridge and later CPUs."
* 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: hpet: Fix inverted return value check in arch_setup_hpet_msi()
x86: hpet: Fix masking of MSI interrupts
x86: apic: Use tsc deadline for oneshot when available
Pull "Nuke 386-DX/SX support" from Ingo Molnar:
"This tree removes ancient-386-CPUs support and thus zaps quite a bit
of complexity:
24 files changed, 56 insertions(+), 425 deletions(-)
... which complexity has plagued us with extra work whenever we wanted
to change SMP primitives, for years.
Unfortunately there's a nostalgic cost: your old original 386 DX33
system from early 1991 won't be able to boot modern Linux kernels
anymore. Sniff."
I'm not sentimental. Good riddance.
* 'x86-nuke386-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, 386 removal: Document Nx586 as a 386 and thus unsupported
x86, cleanups: Simplify sync_core() in the case of no CPUID
x86, 386 removal: Remove CONFIG_X86_POPAD_OK
x86, 386 removal: Remove CONFIG_X86_WP_WORKS_OK
x86, 386 removal: Remove CONFIG_INVLPG
x86, 386 removal: Remove CONFIG_BSWAP
x86, 386 removal: Remove CONFIG_XADD
x86, 386 removal: Remove CONFIG_CMPXCHG
x86, 386 removal: Remove CONFIG_M386 from Kconfig
Pull x86 topology discovery improvements from Ingo Molnar:
"These changes improve topology discovery on AMD CPUs.
Right now this feeds information displayed in
/sys/devices/system/cpu/cpuX/cache/indexY/* - but in the future we
could use this to set up a better scheduling topology."
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cacheinfo: Base cache sharing info on CPUID 0x8000001d on AMD
x86, cacheinfo: Make use of CPUID 0x8000001d for cache information on AMD
x86, cacheinfo: Determine number of cache leafs using CPUID 0x8000001d on AMD
x86: Add cpu_has_topoext
Pull x86 cleanups from Ingo Molnar:
"Small cleanups."
* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Fix the error of using "const" in gen-insn-attr-x86.awk
x86, apic: Cleanup cfg->domain setup for legacy interrupts
x86: Remove dead hlt_use_halt code
Pull x86 BSP hotplug changes from Ingo Molnar:
"This tree enables CPU#0 (the boot processor) to be onlined/offlined on
x86, just like any other CPU. Enabled on Intel CPUs for now.
Allowing this required the identification and fixing of latent CPU#0
assumptions (such as CPU#0 initializations, etc.) in the x86
architecture code, plus the identification of barriers to
BSP-offlining, such as active PIC interrupts which can only be
serviced on the BSP.
It's behind a default-off option, and there's a debug option that
allows the automatic testing of this feature.
The motivation of this feature is to allow and prepare for true
CPU-hotplug hardware support: recent changes to MCE support enable us
to detect a deteriorating but not yet hard-failing L1/L2 cache on a
CPU that could be soft-unplugged - or a failing L3 cache on a
multi-socket system.
Note that true hardware hot-plug is not yet fully enabled by this,
because that requires a special platform wakeup sequence to be sent to
the freshly powered up CPU#0. Future patches for this are planned,
once such a platform exists. Chicken and egg"
* 'x86-bsp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, topology: Debug CPU0 hotplug
x86/i387.c: Initialize thread xstate only on CPU0 only once
x86, hotplug: Handle retrigger irq by the first available CPU
x86, hotplug: The first online processor saves the MTRR state
x86, hotplug: During CPU0 online, enable x2apic, set_numa_node.
x86, hotplug: Wake up CPU0 via NMI instead of INIT, SIPI, SIPI
x86-32, hotplug: Add start_cpu0() entry point to head_32.S
x86-64, hotplug: Add start_cpu0() entry point to head_64.S
kernel/cpu.c: Add comment for priority in cpu_hotplug_pm_callback
x86, hotplug, suspend: Online CPU0 for suspend or hibernate
x86, hotplug: Support functions for CPU0 online/offline
x86, topology: Don't offline CPU0 if any PIC irq can not be migrated out of it
x86, Kconfig: Add config switch for CPU0 hotplug
doc: Add x86 CPU0 online/offline feature
