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Minchan Kim db8ffbd4e7 zram: write incompressible pages to backing device 
This patch enables write IO to transfer data to backing device.  For
that, it implements write_to_bdev function which creates new bio and
chaining with parent bio to make the parent bio asynchrnous.

For rw_page which don't have parent bio, it submit owned bio and handle
IO completion by zram_page_end_io.

Also, this patch defines new flag ZRAM_WB to mark written page for later
read IO.

[xieyisheng1@huawei.com: fix typo in comment]
  Link: http://lkml.kernel.org/r/1502707447-6944-2-git-send-email-xieyisheng1@huawei.com
Link: http://lkml.kernel.org/r/1498459987-24562-8-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Cc: Juneho Choi <juno.choi@lge.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-09-06 17:27:25 -07:00
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accessibility
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acpi
Merge tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:50:00 -07:00
amba
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android
ANDROID: binder: don't queue async transactions to thread.
2017-09-01 09:22:50 +02:00
ata
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 08:13:52 -07:00
atm
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auxdisplay
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base
mm, memory_hotplug: remove zone restrictions
2017-09-06 17:27:25 -07:00
bcma
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block
zram: write incompressible pages to backing device
2017-09-06 17:27:25 -07:00
bluetooth
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bus
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cdrom
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char
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
clk
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clocksource
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 13:06:34 -07:00
connector
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cpufreq
Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:45:03 -07:00
cpuidle
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:19:08 -07:00
crypto
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dax
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dca
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devfreq
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dio
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dma
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dma-buf
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edac
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eisa
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extcon
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firewire
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firmware
Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:45:03 -07:00
fmc
drivers/fmc: carrier can program FPGA on registration
2017-08-28 16:24:22 +02:00
fpga
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fsi
drivers/fsi/scom: Remove reset before every putscom
2017-08-28 17:15:16 +02:00
gpio
Merge tag 'gpio-v4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
2017-09-05 11:49:48 -07:00
gpu
drm/i915: wire up shrinkctl->nr_scanned
2017-09-06 17:27:25 -07:00
hid
Merge branch 'for-4.14/wacom' into for-linus
2017-09-05 11:14:10 +02:00
hsi
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hv
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hwmon
hwmon: (ltq-cputemp) add cpu temp sensor driver
2017-09-01 07:24:14 -07:00
hwspinlock
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hwtracing
Merge tag 'stm-for-greg-20170825' of git://git.kernel.org/pub/scm/linux/kernel/git/ash/stm into char-misc-next
2017-08-28 16:58:19 +02:00
i2c
i2c: designware: Round down ACPI provided clk to nearest supported clk
2017-08-31 20:27:39 +02:00
ide
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idle
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:19:08 -07:00
iio
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
2017-09-05 11:54:41 -07:00
infiniband
Merge tag 'for-linus-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
2017-09-03 17:49:17 -07:00
input
Merge tag 'driver-core-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2017-09-05 10:41:21 -07:00
iommu
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 12:21:28 -07:00
ipack
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irqchip
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 13:08:27 -07:00
isdn
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leds
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lightnvm
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macintosh
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mailbox
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mcb
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
md
dm mpath: do not lock up a CPU with requeuing activity
2017-08-28 09:58:27 -04:00
media
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memory
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memstick
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message
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mfd
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:19:08 -07:00
misc
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
mmc
mmc: sdhci-xenon: add set_power callback
2017-08-30 14:11:47 +02:00
mtd
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mux
mux: make device_type const
2017-08-29 13:46:35 +02:00
net
Merge branch 'parisc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
2017-09-05 09:37:11 -07:00
nfc
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ntb
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nubus
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nvdimm
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nvme
Merge tag 'for-linus-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
2017-09-03 17:49:17 -07:00
nvmem
nvmem: core: remove unneeded NULL check
2017-08-28 17:33:23 +02:00
of
Merge tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:50:00 -07:00
oprofile
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parisc
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parport
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
pci
Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:45:03 -07:00
pcmcia
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perf
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phy
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
pinctrl
Revert "pinctrl: sunxi: Don't enforce bias disable (for now)"
2017-08-31 15:51:49 +02:00
platform
Merge branch 'pm-sleep'
2017-09-04 00:06:02 +02:00
pnp
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power
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:19:08 -07:00
powercap
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pps
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ps3
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ptp
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pwm
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rapidio
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ras
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regulator
Merge tag 'pm-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:19:08 -07:00
remoteproc
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reset
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rpmsg
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rtc
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s390
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-09-05 09:45:46 -07:00
sbus
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scsi
Merge branch 'parisc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
2017-09-05 09:37:11 -07:00
sfi
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sh
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sn
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soc
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spi
Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:45:03 -07:00
spmi
spmi: pmic-arb: Move the ownership check to irq_chip callback
2017-08-28 13:52:22 +02:00
ssb
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staging
Merge tag 'staging-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2017-09-05 10:36:26 -07:00
target
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tc
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tee
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thermal
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thunderbolt
Merge tag 'acpi-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-09-05 12:45:03 -07:00
tty
Merge tag 'staging-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2017-09-05 10:36:26 -07:00
uio
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usb
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-09-05 11:08:17 -07:00
uwb
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vfio
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vhost
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video
Merge tag 'driver-core-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2017-09-05 10:41:21 -07:00
virt
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virtio
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-09-04 09:52:57 -07:00
vlynq
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vme
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w1
drivers: w1: add hwmon temp support for w1_therm
2017-08-31 18:50:14 +02:00
watchdog
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xen
Merge tag 'driver-core-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2017-09-05 10:41:21 -07:00
zorro
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Kconfig
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Makefile
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