Pavel Emelyanov
893e26e61d
userfaultfd: non-cooperative: Add fork() event ...
When the mm with uffd-ed vmas fork()-s the respective vmas notify their
uffds with the event which contains a descriptor with new uffd. This
new descriptor can then be used to get events from the child and
populate its mm with data. Note, that there can be different uffd-s
controlling different vmas within one mm, so first we should collect all
those uffds (and ctx-s) in a list and then notify them all one by one
but only once per fork().
The context is created at fork() time but the descriptor, file struct
and anon inode object is created at event read time. So some trickery
is added to the userfaultfd_ctx_read() to handle the ctx queues' locking
vs file creation.
Another thing worth noticing is that the task that fork()-s waits for
the uffd event to get processed WITHOUT the mmap sem.
[aarcange@redhat.com: build warning fix]
Link: http://lkml.kernel.org/r/20161216144821.5183-10-aarcange@redhat.com
Link: http://lkml.kernel.org/r/20161216144821.5183-9-aarcange@redhat.com
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-22 16:41:28 -08:00
mtd: bcm47xxsflash: use platform_(set|get)_drvdata
2017-02-08 11:19:43 -08:00
can: rx-offload: Add support for timestamp based irq offloading
2017-02-06 15:13:24 +01:00
dmaengine: dw: register IRQ and DMA pool with instance ID
2017-01-25 11:51:39 +05:30
extcon: adc-jack: Fix incompatible pointer type warning
2017-01-09 10:04:09 +09:00
firmware /meson
fpga: Add scatterlist based programming
2017-02-10 15:20:44 +01:00
Linux 4.10-rc6
2017-01-30 14:39:20 +01:00
Immutable branch between MFD, IIO and PWM due for the v4.11 merge window
2017-01-28 18:21:49 +00:00
irqchip/gic-v3: Remove duplicate definition of GICD_TYPER_LPIS
2017-02-08 13:54:11 +00:00
staging/iio driver patches for 4.11-rc1
2017-02-22 12:14:01 -08:00
net/mlx4_en: Pass user MTU value to Firmware at set port command
2017-01-30 15:26:43 -05:00
net/mlx5: TX WQE update
2017-02-06 18:20:16 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-02-22 10:15:09 -08:00
mtd: name the mtd device with an optional label property
2017-02-10 10:16:34 -08:00
netfilter: nfnetlink: allow to check for generation ID
2017-02-12 14:45:11 +01:00
Merge branch 'ib-pinctrl-genprops' into devel
2017-01-26 15:27:54 +01:00
char/misc driver patches for 4.11-rc1
2017-02-22 11:38:22 -08:00
power: supply: bq27xxx: adds specific support for bq27520-g4 revision.
2017-01-12 02:30:13 +01:00
qed: Add support for hardware offloaded FCoE.
2017-02-19 18:10:42 -05:00
sched/rt: Show the 'sched_rr_timeslice' SCHED_RR timeslice tuning knob in milliseconds
2017-02-01 11:01:30 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-02-22 10:15:09 -08:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
usb: chipidea: msm: Handle phy power states
2017-01-20 15:27:35 +08:00
ACPI updates for v4.11-rc1
2017-02-20 17:55:15 -08:00
move aio compat to fs/aio.c
2016-12-22 22:58:37 -05:00
ARM: smccc: Update HVC comment to describe new quirk parameter
2017-02-08 14:54:12 +00:00
async_tx: deprecate broken support for channel switching
2017-02-16 10:08:41 +05:30
Merge branch 'stable-4.11' of git://git.infradead.org/users/pcmoore/audit
2017-02-21 13:25:50 -08:00
block: Dynamically allocate and refcount backing_dev_info
2017-02-02 08:20:50 -07:00
block: Get rid of blk_get_backing_dev_info()
2017-02-02 08:21:32 -07:00
bitfield.h: add FIELD_FIT() helper
2017-02-10 15:52:24 -05:00
blk-mq-sched: allow setting of default IO scheduler
2017-01-17 10:04:31 -07:00
block: fold cmd_type into the REQ_OP_ space
2017-01-31 14:00:44 -07:00
Merge branch 'for-4.11/block' into for-4.11/linus-merge
2017-02-17 14:06:45 -07:00
blktrace: make do_blk_trace_setup() static
2017-02-02 10:20:16 -07:00
bpf: introduce BPF_F_ALLOW_OVERRIDE flag
2017-02-12 21:52:19 -05:00
bpf: make jited programs visible in traces
2017-02-17 13:40:05 -05:00
bpf: add initial bpf tracepoints
2017-01-25 13:17:47 -05:00
net: phy: bcm7xxx: Add BCM74371 PHY ID
2017-02-07 13:03:10 -05:00
block/bsg: move queue creation into bsg_setup_queue
2017-01-27 15:08:35 -07:00
mm: avoid returning VM_FAULT_RETRY from ->page_mkwrite handlers
2017-02-08 15:41:43 -08:00
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-12-22 09:25:45 -08:00
cdrom: Make device operations read-only
2017-02-14 08:29:56 -07:00
clockevents: Add a clkevt-of mechanism like clksrc-of
2017-02-07 20:58:30 +01:00
sched/clock, clocksource: Add optional cs::mark_unstable() method
2017-01-14 11:29:43 +01:00
fs/binfmt: Convert obsolete cputime type to nsecs
2017-02-01 09:13:51 +01:00
gcc-plugins: Add structleak for more stack initialization
2017-01-18 12:02:35 -08:00
Merge branch 'scsi-target-for-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/bvanassche/linux
2016-12-21 10:16:05 -08:00
console: Add callback to flush scrollback buffer to consw struct
2017-01-25 11:54:02 +01:00
coredump: Ensure proper size of sparse core files
2017-01-14 19:32:40 -05:00
cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
2016-12-25 10:47:43 +01:00
cpufreq: Fix typos in comments
2017-02-04 00:47:59 +01:00
arm64 updates for 4.11:
2017-02-22 10:46:44 -08:00
cpuidle:powernv: Add helper function to populate powernv idle states.
2017-01-31 08:32:13 +11:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 10:06:32 -08:00
sched/cputime: Remove generic asm headers
2017-02-01 09:14:07 +01:00
ext4: move halfmd4 into hash.c directly
2017-02-02 11:52:14 -05:00
mm, dax: change pmd_fault() to take only vmf parameter
2017-02-22 16:41:26 -08:00
driver core patches for 4.11-rc1
2017-02-22 11:44:32 -08:00
delay: Add explanation of udelay() inaccuracy
2017-01-20 14:32:39 -08:00
delayacct: Include <uapi/linux/taskstats.h>
2017-02-07 10:57:47 +01:00
PM / devfreq: Fix available_governor sysfs
2017-01-31 15:46:49 +09:00
dm: always defer request allocation to the owner of the request_queue
2017-01-27 15:08:35 -07:00
device: Implement a bus agnostic dev_num_vf routine
2017-01-20 11:43:17 -05:00
iommu/dma: Remove bogus dma_supported() implementation
2017-02-06 13:14:10 +01:00
common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute
2017-01-19 15:56:19 +00:00
dmaengine: Provide a wrapper for memcpy operations
2017-01-31 09:03:20 +05:30
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
EDAC: Fix typos in enum mem_type comments
2017-01-06 15:56:18 +01:00
efi/x86: Move the EFI BGRT init code to early init code
2017-02-01 08:45:46 +01:00
efi: Get and store the secure boot status
2017-02-07 10:42:10 +01:00
blk-mq: pass bio to blk_mq_sched_get_rq_priv
2017-02-10 09:09:59 -07:00
net: add devm version of alloc_etherdev_mqs function
2017-01-29 19:24:12 -05:00
module: unify absolute krctab definitions for 32-bit and 64-bit
2017-02-03 08:28:25 -08:00
extcon: Add new EXTCON_CHG_USB_PD type for USB Power Delivery
2017-01-09 10:04:58 +09:00
This renames the (now inaccurate) CONFIG_DEBUG_RODATA and related config
2017-02-21 17:56:45 -08:00
block: Make blk_get_backing_dev_info() safe without open bdev
2017-02-02 08:20:53 -07:00
fscache: Fix dead object requeue
2017-01-31 13:23:09 -05:00
fscrypt: split supp and notsupp declarations into their own headers
2017-02-06 23:26:43 -05:00
fscrypt: split supp and notsupp declarations into their own headers
2017-02-06 23:26:43 -05:00
fscrypt: split supp and notsupp declarations into their own headers
2017-02-06 23:26:43 -05:00
drivers/fsi: add driver to device matches
2017-02-10 15:19:48 +01:00
mtd: nand: ifc: Fix location of eccstat registers for IFC V1.0
2017-02-06 08:54:01 +01:00
Merge branch 'stable-4.10' of git://git.infradead.org/users/pcmoore/audit
2017-01-05 23:06:06 -08:00
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
scsi, block: fix duplicate bdi name registration crashes
2017-02-02 08:23:19 -07:00
mm: rename __page_frag functions to __page_frag_cache, drop order from drain
2017-01-10 18:31:55 -08:00
iio: Add gravity sensor support
2017-01-05 13:07:24 +00:00
time: Remove CONFIG_TIMER_STATS
2017-02-10 11:15:08 +01:00
vmbus: constify parameters where possible
2017-02-14 10:20:35 -08:00
i2c: allow specify device properties in i2c_board_info
2017-02-08 13:34:41 +01:00
block: fold cmd_type into the REQ_OP_ space
2017-01-31 14:00:44 -07:00
nl80211: add HT/VHT capabilities to AP parameters
2017-02-08 10:06:24 +01:00
bridge: uapi: add per vlan tunnel info
2017-02-03 15:21:21 -05:00
net: wan: Remove unused stats member from struct frad_local
2017-01-27 11:32:26 -05:00
tap: Renaming tap related APIs, data structures, macros
2017-02-11 20:59:41 -05:00
tap: tap as an independent module
2017-02-11 20:59:41 -05:00
ima: on soft reboot, save the measurement list
2016-12-20 09:48:44 -08:00
arch: Rename CONFIG_DEBUG_RODATA and CONFIG_DEBUG_MODULE_RONX
2017-02-07 12:32:52 -08:00
timers: Omit POSIX timer stuff from task_struct when disabled
2017-01-27 13:05:26 -08:00
Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next
2017-02-10 15:13:10 +01:00
Merge branches 'iommu/fixes', 'arm/exynos', 'arm/renesas', 'arm/smmu', 'arm/mediatek', 'arm/core', 'x86/vt-d' and 'core' into next
2017-02-10 15:13:10 +01:00
net/ipv6: allow sysctl to change link-local address generation mode
2017-01-27 10:25:34 -05:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 10:52:23 -08:00
irqdomain: irq_domain_check_msi_remap
2017-01-23 15:00:45 +00:00
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
time: Introduce jiffies64_to_nsecs()
2017-02-01 09:13:45 +01:00
jump_labels: Move header guard #endif down where it belongs
2017-01-19 08:40:44 +01:00
jump_labels: API for flushing deferred jump label updates
2017-01-12 14:33:16 +01:00
taint/module: Fix problems when out-of-kernel driver defines true or false
2017-01-17 10:56:45 -08:00
sched/cputime: Push time to account_system_time() in nsecs
2017-02-01 09:13:58 +01:00
kmod: make usermodehelper path a const string
2017-01-19 12:45:33 +01:00
kprobes, extable: Identify kprobes trampolines as kernel text area
2017-01-14 08:38:05 +01:00
kref: Implement 'struct kref' using refcount_t
2017-02-10 09:04:19 +01:00
ktime: Get rid of ktime_equal()
2016-12-25 17:21:23 +01:00
leds: class: Add new optional brightness_hw_changed attribute
2017-01-29 19:59:42 +01:00
Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
2017-02-21 17:21:32 -08:00
lightnvm: allow targets to use sysfs
2017-01-31 08:32:13 -07:00
list: introduce list_for_each_entry_from_reverse helper
2017-02-03 16:35:42 -05:00
llist: Clarify comments about when locking is needed
2017-01-23 11:37:13 -08:00
log2: make order_base_2() behave correctly on const input value zero
2017-02-03 09:56:43 -08:00
Merge branch 'stable-4.11' of git://git.infradead.org/users/pcmoore/selinux into next
2017-02-10 10:28:49 +11:00
net: phy: marvell: Add support for 88e1545 PHY
2017-02-02 22:05:28 -05:00
math64, timers: Fix 32bit mul_u64_u32_shr() and friends
2017-01-14 11:31:50 +01:00
vfio-mdev: fix non-standard ioctl return val causing i386 build fail
2017-01-04 13:22:38 -07:00
net: phy: Allow pre-declaration of MDIO devices
2017-02-07 10:51:46 -05:00
slab: use memcg_kmem_cache_wq for slab destruction operations
2017-02-22 16:41:27 -08:00
base/memory, hotplug: fix a kernel oops in show_valid_zones()
2017-02-03 14:13:19 -08:00
net: phy: micrel: add support for KSZ8795
2017-01-27 11:10:50 -05:00
apm-emulation: move APM_MINOR_DEV to include/linux/miscdevice.h
2017-01-10 21:46:41 +01:00
mm, dax: change pmd_fault() to take only vmf parameter
2017-02-22 16:41:26 -08:00
mm, memcg: fix the active list aging for lowmem requests when memcg is enabled
2017-01-10 18:31:55 -08:00
mm, page_alloc: fix check for NULL preferred_zone
2017-01-24 16:26:14 -08:00
net: phy: Allow pre-declaration of MDIO devices
2017-02-07 10:51:46 -05:00
This renames the (now inaccurate) CONFIG_DEBUG_RODATA and related config
2017-02-21 17:56:45 -08:00
ipmr: improve hash scalability
2017-01-12 16:48:26 -05:00
net: ipv6: remove nowait arg to rt6_fill_node
2017-01-18 15:43:59 -05:00
genirq/msi: Add stubs for get_cached_msi_msg/pci_write_msi_msg
2017-02-16 15:32:19 +01:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
net: remove support for per driver ndo_busy_poll()
2017-02-03 17:28:29 -05:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2017-02-16 21:25:49 -05:00
nfs: Don't increment lock sequence ID after NFS4ERR_MOVED
2017-01-24 12:50:47 -05:00
NFS: Clean up nfs_attribute_timeout()
2016-12-19 17:29:44 -05:00
kernel/watchdog: prevent false hardlockup on overloaded system
2017-01-24 16:26:14 -08:00
NTB bug fixes for removing an unnecessary call to ntb_peer_spad_read,
2016-12-24 11:23:24 -08:00
Merge branch 'for-4.11/next' into for-4.11/linus-merge
2017-02-17 14:08:19 -07:00
of: base: add support to find the level of the last cache
2017-01-17 12:09:33 +00:00
of: device: Support loading a module with OF based modalias
2017-01-20 11:23:51 +08:00
iommu: Remove iommu_register_instance interface
2017-02-10 14:54:37 +01:00
mm: optimize PageWaiters bit use for unlock_page()
2016-12-29 11:03:15 -08:00
mm: add PageWaiters indicating tasks are waiting for a page bit
2016-12-25 11:54:48 -08:00
lib: Introduce priority array area manager
2017-02-03 16:35:42 -05:00
device: Implement a bus agnostic dev_num_vf routine
2017-01-20 11:43:17 -05:00
percpu-refcount: fix reference leak during percpu-atomic transition
2017-01-28 07:49:42 -05:00
locking/percpu-rwsem: Replace waitqueue with rcuwait
2017-01-14 11:14:35 +01:00
perf/core: Allow kernel filters on CPU events
2017-02-10 09:08:09 +01:00
dax: add tracepoints to dax_pmd_insert_mapping()
2017-02-22 16:41:26 -08:00
net: phy: Check phydev->drv
2017-02-20 10:15:11 -05:00
net: phy: leds: Fix truncated LED trigger names
2017-01-25 14:40:19 -05:00
PM / Domains: Provide dummy governors if CONFIG_PM_GENERIC_DOMAINS=n
2017-02-09 14:29:27 +01:00
PM / OPP: Expose _of_get_opp_desc_node as dev_pm_opp API
2017-02-09 22:52:17 +01:00
PM / QoS: Remove unneeded linux/miscdevice.h include
2017-01-27 11:26:58 +01:00
locking/mutex: Initialize mutex_waiter::ww_ctx with poison when debugging
2017-01-14 11:14:53 +01:00
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
timers/itimer: Convert internal cputime_t units to nsec
2017-02-01 09:13:55 +01:00
device property: export code duplicating array of property entries
2017-02-07 13:21:15 +01:00
ptr_ring: fix race conditions when resizing
2017-02-20 10:27:56 -05:00
spi: pxa2xx: fix indentation of the comments in header
2017-01-04 18:36:41 +00:00
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2016-12-19 08:23:53 -08:00
mm: workingset: fix use-after-free in shadow node shrinker
2017-01-07 18:22:40 -08:00
ratelimit: fix WARN_ON_RATELIMIT return value
2016-12-20 09:48:47 -08:00
srcu: Force full grace-period ordering
2017-01-25 12:54:22 -08:00
rcu: Abstract extended quiescent state determination
2017-01-23 11:44:18 -08:00
sched/wait, rcuwait: Fix typo in comment
2017-02-01 09:17:51 +01:00
refcount_t: Introduce a special purpose refcount type
2017-02-10 09:04:19 +01:00
Merge remote-tracking branches 'regmap/topic/doc' and 'regmap/topic/rbtree' into regmap-next
2017-02-03 12:34:59 +01:00
Revert "remoteproc: Merge table_ptr and cached_table pointers"
2016-12-30 03:26:31 -08:00
rhashtable: Add nested tables
2017-02-17 12:28:35 -05:00
sbitmap: add helpers for dumping to a seq_file
2017-01-27 08:17:44 -07:00
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-02-20 13:23:30 -08:00
sctp: add support for generating stream reconf resp chunk
2017-02-19 18:17:59 -05:00
security,selinux,smack: kill security_task_wait hook
2017-01-12 11:10:57 -05:00
block/sed-opal: allocate struct opal_dev dynamically
2017-02-17 12:41:47 -07:00
serdev: add a tty port controller driver
2017-02-03 10:17:02 +01:00
serial: do not accept sysrq characters via serial port
2017-01-12 11:51:24 +01:00
serial: sh-sci: Compute the regshift value for SCI ports
2017-01-19 14:17:05 +01:00
siphash: implement HalfSipHash1-3 for hash tables
2017-01-09 13:58:57 -05:00
net/skbuff: Introduce skb_mac_offset()
2017-02-10 13:18:33 -05:00
slab: remove synchronous synchronize_sched() from memcg cache deactivation path
2017-02-22 16:41:27 -08:00
slub: separate out sysfs_slab_release() from sysfs_slab_remove()
2017-02-22 16:41:27 -08:00
smc: establish new socket family
2017-01-09 16:07:38 -05:00
locking/spinlocks: Remove the unused spin_lock_bh_nested() API
2017-01-12 09:33:39 +01:00
locking/spinlocks: Remove the unused spin_lock_bh_nested() API
2017-01-12 09:33:39 +01:00
locking/spinlocks: Remove the unused spin_lock_bh_nested() API
2017-01-12 09:33:39 +01:00
misc: sram: Introduce support code for protect-exec sram type
2017-01-25 11:48:03 +01:00
srcu: Implement more-efficient reader counts
2017-01-25 12:53:20 -08:00
net: stmmac: Remove the bus_setup function pointer
2017-02-08 15:11:22 -05:00
Revert "PM / sleep / ACPI: Use the ACPI_FADT_LOW_POWER_S0 flag"
2017-01-20 03:33:57 +01:00
mm: support anonymous stable page
2017-01-10 18:31:55 -08:00
swiotlb: Export swiotlb_max_segment to users
2017-01-06 13:00:01 -05:00
tcp: add tcp_mss_clamp() helper
2017-02-03 11:19:34 -05:00
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
time: Remove CONFIG_TIMER_STATS
2017-02-10 11:15:08 +01:00
timerfd: export defines to userspace
2017-01-10 18:31:55 -08:00
tracing: add __print_flags_u64()
2017-02-22 16:41:26 -08:00
tty_port: Add port client functions
2017-02-03 10:17:02 +01:00
clocksource: Use a plain u64 instead of cycle_t
2016-12-25 11:04:12 +01:00
userfaultfd: non-cooperative: Add fork() event
2017-02-22 16:41:28 -08:00
afs: Move UUID struct to linux/uuid.h
2017-02-10 16:34:17 +00:00
virtio_net: refactor freeze/restore logic into virtnet reset logic
2017-02-07 10:05:12 -05:00
virtio-net: restore VIRTIO_HDR_F_DATA_VALID on receiving
2017-01-20 11:01:17 -05:00
VME: Remove node entry from vme_driver
2017-01-11 09:21:41 +01:00
vmw_vmci: switch to pci_irq_alloc_vectors
2017-02-03 11:49:06 +01:00
sched/cputime: Rename vtime_account_user() to vtime_flush()
2017-01-14 09:54:13 +01:00
ktime: Get rid of the union
2016-12-25 17:21:22 +01:00
mm: add PageWaiters indicating tasks are waiting for a page bit
2016-12-25 11:54:48 -08:00
locking/ww_mutex: Turn off __must_check for now
2017-01-14 12:11:59 +01:00
