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Tejun Heo 918a8c2c4e cgroup: remove unnecessary empty check when enabling threaded mode 
cgroup_enable_threaded() checks that the cgroup doesn't have any tasks
or children and fails the operation if so.  This test is unnecessary
because the first part is already checked by
cgroup_can_be_thread_root() and the latter is unnecessary.  The latter
actually cause a behavioral oddity.  Please consider the following
hierarchy.  All cgroups are domains.

    A
   / \
  B   C
       \
        D

If B is made threaded, C and D becomes invalid domains.  Due to the no
children restriction, threaded mode can't be enabled on C.  For C and
D, the only thing the user can do is removal.

There is no reason for this restriction.  Remove it.

Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2017-07-25 13:15:29 -04:00
..
ABI
Merge tag 'for-linus-20170713' of git://git.infradead.org/linux-mtd
2017-07-13 12:07:44 -07:00
accounting
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acpi
Merge tag 'gpio-v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
2017-07-07 12:40:27 -07:00
admin-guide
Merge branch 'akpm' (patches from Andrew)
2017-07-06 22:27:08 -07:00
aoe
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arm
ARM: at91: Documentation: add armv7m families
2017-06-02 10:11:09 +02:00
arm64
Merge tag 'iommu-updates-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
2017-07-12 10:00:04 -07:00
auxdisplay
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backlight
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blackfin
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block
bio-integrity: fold bio_integrity_enabled to bio_integrity_prep
2017-07-03 16:56:24 -06:00
blockdev
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bus-devices
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cdrom
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cgroup-v1
mm, vmpressure: pass-through notification support
2017-07-10 16:32:31 -07:00
cma
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connector
…
console
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core-api
Merge tag '4.13-fixes' of git://git.lwn.net/linux
2017-07-13 13:44:54 -07:00
cpu-freq
cpufreq: intel_pstate: Document the current behavior and user interface
2017-05-14 02:06:03 +02:00
cpuidle
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cris
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crypto
KEYS: Add documentation for asymmetric keyring restrictions
2017-07-14 11:01:38 +10:00
dev-tools
Merge tag 'linux-kselftest-4.13-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2017-07-07 14:04:47 -07:00
device-mapper
dm zoned: drive-managed zoned block device target
2017-06-19 11:05:20 -04:00
devicetree
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2017-07-15 10:59:54 -07:00
dmaengine
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doc-guide
kernel-doc: describe the `literal` syntax
2017-05-16 08:44:24 -03:00
driver-api
Merge tag '4.13-fixes' of git://git.lwn.net/linux
2017-07-13 13:44:54 -07:00
driver-model
Merge tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
2017-07-08 15:51:57 -07:00
early-userspace
…
EDID
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extcon
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fault-injection
fault-inject: add /proc/<pid>/fail-nth
2017-07-14 15:05:13 -07:00
fb
docs: update old references for DocBook from the documentation
2017-05-16 08:44:19 -03:00
features
Merge tag 'powerpc-4.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2017-05-05 11:36:44 -07:00
filesystems
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
firmware_class
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fmc
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fpga
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frv
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gpio
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gpu
Merge tag 'drm-for-v4.13' of git://people.freedesktop.org/~airlied/linux
2017-07-09 18:48:37 -07:00
hid
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hwmon
hwmon: (pmbus) move header file out of I2C realm
2017-06-11 17:08:19 -07:00
i2c
i2c: i801: Add support for Intel Cannon Lake
2017-06-19 16:17:41 +02:00
ia64
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ide
…
iio
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infiniband
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input
Merge tag '4.13-fixes' of git://git.lwn.net/linux
2017-07-13 13:44:54 -07:00
ioctl
scsi: cxlflash: Introduce host ioctl support
2017-06-26 15:01:11 -04:00
isdn
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kbuild
Merge tag 'kbuild-thinar-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2017-07-07 15:11:12 -07:00
kdump
kexec/kdump: minor Documentation updates for arm64 and Image
2017-07-12 16:26:00 -07:00
kernel-hacking
Merge tag 'docs-4.13' of git://git.lwn.net/linux
2017-07-03 21:13:25 -07:00
laptops
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leds
…
lightnvm
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livepatch
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locking
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m68k
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md
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-05-03 10:05:38 -07:00
media
Merge tag 'media/v4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2017-07-06 11:15:19 -07:00
memory-devices
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metag
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mic
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mips
…
misc-devices
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mmc
Merge tag 'mmc-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
2017-05-02 17:34:32 -07:00
mn10300
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mtd
…
namespaces
…
netlabel
…
networking
net: Fix minor code bug in timestamping.txt
2017-07-11 13:34:54 -07:00
nfc
…
nios2
…
nvdimm
…
nvmem
…
parisc
…
PCI
docs: update old references for DocBook from the documentation
2017-05-16 08:44:19 -03:00
pcmcia
…
perf
…
phy
…
platform
…
power
Merge tag 'for-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
2017-07-04 14:25:14 -07:00
powerpc
Merge tag 'powerpc-4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2017-07-07 13:55:45 -07:00
pps
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process
Merge tag 'kbuild-thinar-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2017-07-07 15:11:12 -07:00
pti
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ptp
…
rapidio
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RCU
rcu: Remove debugfs tracing
2017-06-08 18:52:43 -07:00
s390
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scheduler
sched/deadline: Add documentation about GRUB reclaiming
2017-06-08 10:31:56 +02:00
scsi
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security
KEYS: Add documentation for asymmetric keyring restrictions
2017-07-14 11:01:38 +10:00
serial
tty: n_gsm: do not send/receive in ldisc close path
2017-06-03 18:48:52 +09:00
sh
docs-rst: convert sh book to ReST
2017-05-16 08:44:18 -03:00
sound
Merge tag 'sound-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
2017-07-06 10:56:51 -07:00
sparc
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sphinx
Docs: clean up some DocBook loose ends
2017-06-23 14:17:38 -06:00
sphinx-static
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spi
spi: Document SPI slave controller support
2017-05-26 13:11:00 +01:00
sysctl
mm: document highmem_is_dirtyable sysctl
2017-07-10 16:32:32 -07:00
target
Documentation/target: add an example script to configure an iSCSI target
2017-05-01 22:21:35 -07:00
thermal
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
2017-05-12 11:58:45 -07:00
timers
rcu: Eliminate NOCBs CPU-state Kconfig options
2017-06-08 18:52:43 -07:00
trace
Merge tag 'trace-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-07-13 13:17:19 -07:00
translations
kokr/memory-barriers.txt: Fix obsolete link to atomic_ops.txt
2017-07-12 16:56:40 -06:00
usb
usb: gadget: add f_uac1 variant based on a new u_audio api
2017-06-19 09:22:47 +03:00
userspace-api
doc: ReSTify no_new_privs.txt
2017-05-18 10:30:09 -06:00
virtual
kvm: x86: hyperv: make VP_INDEX managed by userspace
2017-07-14 16:28:18 +02:00
vm
ksm: introduce ksm_max_page_sharing per page deduplication limit
2017-07-06 16:24:31 -07:00
w1
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watchdog
watchdog: uniphier: add UniPhier watchdog driver
2017-07-03 13:58:55 +02:00
wimax
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x86
x86/mce: Update bootlog description to reflect behavior on AMD
2017-06-14 07:32:10 +02:00
xtensa
of: update ePAPR references to point to Devicetree Specification
2017-06-22 11:22:06 -05:00
.gitignore
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00-INDEX
Merge tag 'linux-kselftest-4.13-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2017-07-07 14:04:47 -07:00
bcache.txt
bcache.txt: standardize document format
2017-07-14 13:51:27 -06:00
bt8xxgpio.txt
bt8xxgpio.txt: standardize document format
2017-07-14 13:51:27 -06:00
btmrvl.txt
btmrvl.txt: standardize document format
2017-07-14 13:51:27 -06:00
bus-virt-phys-mapping.txt
bus-virt-phys-mapping.txt: standardize document format
2017-07-14 13:51:28 -06:00
cachetlb.txt
cachetlb.txt: standardize document format
2017-07-14 13:51:28 -06:00
cgroup-v2.txt
cgroup: remove unnecessary empty check when enabling threaded mode
2017-07-25 13:15:29 -04:00
Changes
…
circular-buffers.txt
circular-buffers.txt: standardize document format
2017-07-14 13:51:29 -06:00
clk.txt
clk.txt: standardize document format
2017-07-14 13:51:29 -06:00
CodingStyle
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conf.py
Docs: Fix breakage with Sphinx 1.5 and upper
2017-06-23 13:45:37 -06:00
cpu-load.txt
cpu-load: standardize document format
2017-07-14 13:51:30 -06:00
cputopology.txt
cputopology.txt: standardize document format
2017-07-14 13:51:30 -06:00
crc32.txt
crc32.txt: standardize document format
2017-07-14 13:51:30 -06:00
dcdbas.txt
dcdbas.txt: standardize document format
2017-07-14 13:51:31 -06:00
debugging-modules.txt
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debugging-via-ohci1394.txt
debugging-via-ohci1394.txt: standardize document format
2017-07-14 13:51:34 -06:00
dell_rbu.txt
dell_rbu.txt: standardize document format
2017-07-14 13:58:12 -06:00
digsig.txt
digsig.txt: standardize document format
2017-07-14 13:51:31 -06:00
DMA-API-HOWTO.txt
DMA-API-HOWTO.txt: standardize document format
2017-07-14 13:51:32 -06:00
DMA-API.txt
DMA-API.txt: standardize document format
2017-07-14 13:51:32 -06:00
DMA-attributes.txt
DMA-attributes.txt: standardize document format
2017-07-14 13:51:33 -06:00
DMA-ISA-LPC.txt
DMA-ISA-LPC.txt: standardize document format
2017-07-14 13:51:33 -06:00
docutils.conf
…
dontdiff
Merge tag 'gcc-plugins-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2017-07-05 11:46:59 -07:00
efi-stub.txt
efi-stub.txt: standardize document format
2017-07-14 13:51:34 -06:00
eisa.txt
eisa.txt: standardize document format
2017-07-14 13:51:34 -06:00
flexible-arrays.txt
flexible-arrays.txt: standardize document format
2017-07-14 13:51:35 -06:00
futex-requeue-pi.txt
futex-requeue-pi.txt: standardize document format
2017-07-14 13:51:35 -06:00
gcc-plugins.txt
gcc-plugins.txt: standardize document format
2017-07-14 13:51:36 -06:00
highuid.txt
highuid.txt: standardize document format
2017-07-14 13:51:36 -06:00
hw_random.txt
hw_random.txt: standardize document format
2017-07-14 13:51:37 -06:00
hwspinlock.txt
hwspinlock.txt: standardize document format
2017-07-14 13:51:37 -06:00
index.rst
Make the main documentation title less Geocities
2017-06-23 14:02:27 -06:00
intel_txt.txt
intel_txt.txt: standardize document format
2017-07-14 13:51:38 -06:00
Intel-IOMMU.txt
Intel-IOMMU.txt: standardize document format
2017-07-14 13:51:38 -06:00
io_ordering.txt
io_ordering.txt: standardize document format
2017-07-14 13:51:39 -06:00
io-mapping.txt
io-mapping.txt: standardize document format
2017-07-14 13:51:38 -06:00
iostats.txt
iostats.txt: update it to cover recent Kernels
2017-07-14 13:51:40 -06:00
IPMI.txt
IPMI.txt: standardize document format
2017-07-14 13:51:40 -06:00
IRQ-affinity.txt
IRQ-affinity.txt: standardize document format
2017-07-14 13:51:41 -06:00
IRQ-domain.txt
IRQ-domain.txt: standardize document format
2017-07-14 13:51:41 -06:00
IRQ.txt
IRQ.txt: add a markup for its title
2017-07-14 13:51:42 -06:00
irqflags-tracing.txt
irqflags-tracing.txt: standardize document format
2017-07-14 13:51:42 -06:00
isa.txt
isa.txt: standardize document format
2017-07-14 13:51:43 -06:00
isapnp.txt
isapnp.txt: promote title level
2017-07-14 13:51:43 -06:00
kernel-doc-nano-HOWTO.txt
docs: update old references for DocBook from the documentation
2017-05-16 08:44:19 -03:00
kernel-per-CPU-kthreads.txt
kernel-per-CPU-kthreads.txt: standardize document format
2017-07-14 13:51:43 -06:00
kobject.txt
kobject.txt: standardize document format
2017-07-14 13:51:44 -06:00
kprobes.txt
docs: kprobes.txt: Fix whitespacing
2017-07-14 13:58:14 -06:00
kref.txt
kref.txt: standardize document format
2017-07-14 13:51:45 -06:00
ldm.txt
ldm.txt: standardize document format
2017-07-14 13:51:45 -06:00
lockup-watchdogs.txt
lockup-watchdogs.txt: standardize document format
2017-07-14 13:51:46 -06:00
logo.gif
…
logo.txt
…
lsm.txt
docs-rst: convert lsm from DocBook to ReST
2017-05-16 08:44:19 -03:00
lzo.txt
lzo.txt: standardize document format
2017-07-14 13:51:46 -06:00
mailbox.txt
mailbox.txt: standardize document format
2017-07-14 13:51:47 -06:00
Makefile
docs: remove DocBook from the building system
2017-05-16 08:44:19 -03:00
memory-barriers.txt
Merge tag '4.13-fixes' of git://git.lwn.net/linux
2017-07-13 13:44:54 -07:00
memory-hotplug.txt
memory-hotplug.txt: standardize document format
2017-07-14 13:57:53 -06:00
men-chameleon-bus.txt
men-chameleon-bus.txt: standardize document format
2017-07-14 13:57:54 -06:00
nommu-mmap.txt
nommu-mmap.txt: don't use all upper case on titles
2017-07-14 13:57:55 -06:00
ntb.txt
Merge tag 'standardize-docs' of git://git.lwn.net/linux
2017-07-15 12:58:58 -07:00
numastat.txt
numastat.txt: standardize document format
2017-07-14 13:57:56 -06:00
padata.txt
padata.txt: standardize document format
2017-07-14 13:57:56 -06:00
parport-lowlevel.txt
parport-lowlevel.txt: standardize document format
2017-07-14 13:57:57 -06:00
percpu-rw-semaphore.txt
percpu-rw-semaphore.txt: standardize document format
2017-07-14 13:57:58 -06:00
phy.txt
phy.txt: standardize document format
2017-07-14 13:57:58 -06:00
pi-futex.txt
pi-futex.txt: standardize document format
2017-07-14 13:57:59 -06:00
pnp.txt
pnp.txt: standardize document format
2017-07-14 13:57:59 -06:00
preempt-locking.txt
preempt-locking.txt: standardize document format
2017-07-14 13:58:00 -06:00
printk-formats.txt
printk-formats.txt: standardize document format
2017-07-14 13:58:00 -06:00
pwm.txt
pwm: Standardize document format
2017-07-06 08:23:30 +02:00
rbtree.txt
rbtree.txt: standardize document format
2017-07-14 13:58:01 -06:00
remoteproc.txt
remoteproc.txt: standardize document format
2017-07-14 13:58:02 -06:00
rfkill.txt
rfkill.txt: standardize document format
2017-07-14 13:58:02 -06:00
robust-futex-ABI.txt
robust-futex-ABI.txt: standardize document format
2017-07-14 13:58:03 -06:00
robust-futexes.txt
robust-futexes.txt: standardize document format
2017-07-14 13:58:03 -06:00
rpmsg.txt
rpmsg.txt: standardize document format
2017-07-14 13:58:04 -06:00
rtc.txt
rtc: add generic nvmem support
2017-07-07 13:14:14 +02:00
SAK.txt
SAK.txt: standardize document format
2017-07-14 13:58:04 -06:00
sgi-ioc4.txt
sgi-ioc4.txt: standardize document format
2017-07-14 13:58:05 -06:00
siphash.txt
siphash.txt: standardize document format
2017-07-14 13:58:06 -06:00
SM501.txt
SM501.txt: standardize document format
2017-07-14 13:58:06 -06:00
smsc_ece1099.txt
smsc_ece1099.txt: standardize document format
2017-07-14 13:58:07 -06:00
static-keys.txt
static-keys.txt: standardize document format
2017-07-14 13:58:07 -06:00
SubmittingPatches
…
svga.txt
svga.txt: standardize document format
2017-07-14 13:58:08 -06:00
switchtec.txt
…
sync_file.txt
sync_file.txt: standardize document format
2017-05-24 13:01:27 -03:00
tee.txt
tee.txt: standardize document format
2017-07-14 13:58:14 -06:00
this_cpu_ops.txt
this_cpu_ops.txt: standardize document format
2017-07-14 13:58:08 -06:00
unaligned-memory-access.txt
unaligned-memory-access.txt: standardize document format
2017-07-14 13:58:09 -06:00
vfio-mediated-device.txt
vfio-mediated-device.txt: standardize document format
2017-07-14 13:58:10 -06:00
vfio.txt
vfio.txt: standardize document format
2017-07-14 13:58:10 -06:00
video-output.txt
…
xillybus.txt
xillybus.txt: standardize document format
2017-07-14 13:58:11 -06:00
xz.txt
xz.txt: standardize document format
2017-07-14 13:58:11 -06:00
zorro.txt
zorro.txt: standardize document format
2017-07-14 13:58:12 -06:00