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Guoqing Jiang 8b9277c814 md-cluster: Protect communication with mutexes 
Communication can happen through multiple threads. It is possible that
one thread steps over another threads sequence. So, we use mutexes to
protect both the send and receive sequences.

Send communication is locked through state bit, MD_CLUSTER_SEND_LOCK.
Communication is locked with bit manipulation in order to allow
"lock and hold" for the add operation. In case of an add operation,
if the lock is held, MD_CLUSTER_SEND_LOCKED_ALREADY is set.
When md_update_sb() calls metadata_update_start(), it checks
(in a single statement to avoid races), if the communication
is already locked. If yes, it merely returns zero, else it
locks the token lockresource.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
2016-01-06 11:39:17 +11:00
..
accessibility
acpi ACPI / processor: Fix thermal cooling device regression 2015-12-21 03:41:49 +01:00
amba
android
ata ata/sata_fsl.c: add ATA_FLAG_NO_LOG_PAGE to blacklist the controller for log page reads 2015-12-07 10:25:57 -05:00
atm
auxdisplay
base Merge branches 'powercap', 'pm-cpufreq' and 'pm-domains' 2015-12-14 22:58:57 +01:00
bcma
block null_blk: use async queue restart helper 2015-12-28 13:07:09 -07:00
bluetooth
bus bus: sunxi-rsb: Fix peripheral IC mapping runtime address 2015-12-22 11:42:30 -08:00
cdrom
char ipmi: move timer init to before irq is setup 2015-12-09 13:13:06 -06:00
clk ARM: SoC fixes for 4.4-rc 2015-12-12 16:43:44 -08:00
clocksource clocksource: Mmio: remove artificial 32bit limitation 2015-12-10 19:37:18 +01:00
connector
cpufreq cpufreq: scpi-cpufreq: signedness bug in scpi_get_dvfs_info() 2015-12-24 02:11:37 +01:00
cpuidle
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-12-05 10:46:44 -08:00
dca
devfreq
dio
dma dmaengine: at_xdmac: fix at_xdmac_prep_dma_memcpy() 2015-12-10 09:48:01 +05:30
dma-buf
edac
eisa
extcon
firewire
firmware
fmc
fpga fpga manager: Fix firmware resource leak on error 2015-11-24 15:25:46 -08:00
gpio gpio: revert get() to non-errorprogating behaviour 2015-12-17 15:48:29 +01:00
gpu Merge tag 'drm-intel-fixes-2016-01-02' of git://anongit.freedesktop.org/drm-intel 2016-01-03 11:36:26 -08:00
hid USB fixes for 4.4-rc5 2015-12-13 11:58:18 -08:00
hsi
hv
hwmon hwmon: (sht15) Select CONFIG_BITREVERSE 2015-12-18 08:19:52 -08:00
hwspinlock
hwtracing
i2c i2c: rcar: disable runtime PM correctly in slave mode 2015-12-19 12:00:37 +01:00
ide
idle
iio iio: adc: spmi-vadc: add missing of_node_put 2015-11-21 18:24:44 +00:00
infiniband RDMA/ocrdma: Depend on async link events from CNA 2015-12-28 11:45:54 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-12-19 09:51:11 -08:00
iommu IOMMU Fixes for Linux v4.4-rc5 2015-12-18 12:38:35 -08:00
ipack
irqchip irqchip/versatile-fpga: Fix PCI IRQ mapping on Versatile PB 2015-12-01 22:50:16 +01:00
isdn ser_gigaset: remove unnecessary kfree() calls from release method 2015-12-15 13:24:21 -05:00
leds
lguest
lightnvm lightnvm: wrong offset in bad blk lun calculation 2015-12-29 08:28:32 -07:00
macintosh
mailbox
mcb
md md-cluster: Protect communication with mutexes 2016-01-06 11:39:17 +11:00
media media fixes for v4.4-rc6 2015-12-18 15:41:35 -08:00
memory fsl-ifc: add missing include on ARM64 2015-12-16 00:16:58 +01:00
memstick
message
mfd
misc cxl: Set endianess of kernel contexts 2015-12-08 16:57:01 +11:00
mmc
mtd This pull request contains four bug fixes for UBI. 2015-12-26 19:55:16 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-12-31 14:40:43 -08:00
nfc
ntb
nubus
nvdimm
nvme NVMe: IO ending fixes on surprise removal 2015-12-22 10:12:04 -07:00
nvmem
of of/irq: Export of_irq_find_parent again 2015-12-09 09:08:36 -06:00
oprofile
parisc parisc iommu: fix panic due to trying to allocate too large region 2015-12-12 16:07:25 +01:00
parport
pci PCI updates for v4.4: 2015-12-31 14:59:21 -08:00
pcmcia
perf
phy phy: core: Get a refcount to phy in devm_of_phy_get_by_index() 2015-12-07 18:44:02 +05:30
pinctrl pinctrl: bcm2835: Fix initial value for direction_output 2015-12-14 11:31:20 +01:00
platform
pnp
power
powercap powercap / RAPL: fix BIOS lock check 2015-12-12 02:31:11 +01:00
pps
ps3
ptp
pwm
rapidio
ras
regulator
remoteproc remoteproc: fix memory leak of remoteproc ida cache layers 2015-11-26 17:44:28 +02:00
reset
rpmsg
rtc rtc: da9063: fix access ordering error during RTC interrupt at system power on 2015-12-20 13:39:29 +01:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2015-12-22 15:43:18 -08:00
sbus
scsi Merge remote-tracking branch 'mkp-scsi/4.4/scsi-fixes' into fixes 2015-12-17 07:32:08 -08:00
sfi
sh
sn
soc Few Keystone fixes for 4.4-rcx 2015-11-25 23:48:12 +01:00
spi Merge remote-tracking branches 'spi/fix/dspi' and 'spi/fix/spidev' into spi-linus 2015-12-16 13:28:32 +00:00
spmi
ssb
staging Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm 2015-12-17 11:20:13 -08:00
target target/stat: print full t10_wwn.model buffer 2015-11-28 21:23:13 -08:00
tc
thermal imx: thermal: use CPU temperature grade info for thresholds 2015-11-23 16:38:40 -08:00
thunderbolt
tty Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2015-12-25 13:15:23 -08:00
uio
usb USB: fix invalid memory access in hub_activate() 2015-12-18 09:30:34 -08:00
uwb
vfio Revert: "vfio: Include No-IOMMU mode" 2015-12-04 08:38:42 -07:00
vhost vhost: replace % with & on data path 2015-12-07 17:28:10 +02:00
video OMAPDSS: fix timings for VENC to match what omapdrm expects 2015-12-09 12:57:13 +02:00
virt
virtio virtio_ring: shadow available ring flags & index 2015-12-07 17:28:11 +02:00
vlynq
vme
w1
watchdog watchdog: mtk_wdt: Use MODE_KEY when stopping the watchdog 2015-11-23 09:00:09 +01:00
xen xen: bug fixes for 4.4-rc5 2015-12-18 12:24:52 -08:00
zorro
Kconfig
Makefile