Merge remote-tracking branch 'xen-two/linux-next'

Conflicts:
arch/x86/xen/Kconfig

Merge remote-tracking branch 'xen/upstream/xen'

Merge remote-tracking branch 'ptrace/ptrace'

Merge remote-tracking branch 'kvm/linux-next'

Conflicts:
include/linux/kvm.h

Merge remote-tracking branch 'rcu/rcu/next'

Merge remote-tracking branch 'tip/auto-latest'

Merge remote-tracking branch 'gpio/gpio/next'

Merge remote-tracking branch 'spi/spi/next'

Merge remote-tracking branch 'devicetree/devicetree/next'

Merge remote-tracking branch 'edac-amd/for-next'

Merge remote-tracking branch 'edac/linux_next'

Conflicts:
arch/x86/kernel/cpu/mcheck/mce.c

Merge remote-tracking branch 'fsnotify/for-next'

Merge remote-tracking branch 'apm/for-next'

Merge remote-tracking branch 'pm/linux-next'

Conflicts:
arch/arm/mach-shmobile/board-ap4evb.c

Merge remote-tracking branch 'trivial/for-next'

Conflicts:
Documentation/PCI/pci.txt
arch/arm/mach-nuc93x/time.c
drivers/net/Kconfig

Merge remote-tracking branch 'osd/linux-next'

Merge remote-tracking branch 'iommu/next'

Merge remote-tracking branch 'watchdog/master'

Merge remote-tracking branch 'agp/agp-next'

Merge remote-tracking branch 'security/next'

Conflicts:
fs/ocfs2/xattr.c

Merge remote-tracking branch 'voltage/for-next'

Merge remote-tracking branch 'omap_dss2/for-next'

Conflicts:
arch/arm/mach-omap2/board-4430sdp.c
drivers/video/omap/lcd_apollon.c
drivers/video/omap/lcd_ldp.c
drivers/video/omap/lcd_overo.c

Merge remote-tracking branch 'viafb/viafb-next'

Merge remote-tracking branch 'fbdev/fbdev-next'

Conflicts:
drivers/video/Kconfig

Merge remote-tracking branch 'mfd/for-next'

Merge remote-tracking branch 'md/for-next'

Merge remote-tracking branch 'slab/for-next'

Merge remote-tracking branch 'kgdb/kgdb-next'

Merge remote-tracking branch 'mmc/mmc-next'

Conflicts:
drivers/mmc/core/core.c
drivers/mmc/core/sd.c

Merge remote-tracking branch 'leds/for-mm'

Conflicts:
drivers/leds/Kconfig

Merge remote-tracking branch 'battery/master'

Merge branch 'quilt/device-mapper'

Merge remote-tracking branch 'block/for-next'

Merge remote-tracking branch 'input/next'

Merge branch 'quilt/rr'

Merge remote-tracking branch 'cpufreq/next'

Merge remote-tracking branch 'sound-asoc/for-next'

Merge remote-tracking branch 'sound/for-next'

Conflicts:
arch/mips/alchemy/devboards/db1x00/platform.c
sound/mips/Kconfig

Merge remote-tracking branch 'crypto/master'

Merge remote-tracking branch 'l2-mtd/master'

Conflicts:
arch/arm/mach-at91/board-afeb-9260v1.c
arch/arm/mach-at91/board-neocore926.c
arch/arm/mach-at91/board-rm9200dk.c
arch/arm/mach-at91/board-sam9g20ek.c
arch/arm/mach-at91/board-sam9m10g45ek.c
arch/arm/mach-at91/board-usb-a9260.c

Merge remote-tracking branch 'bluetooth/master'

Merge remote-tracking branch 'wireless/master'

Conflicts:
drivers/net/wireless/iwlwifi/iwl-pci.c
drivers/net/wireless/wl12xx/main.c

Merge remote-tracking branch 'net/master'

Conflicts:
arch/powerpc/configs/40x/hcu4_defconfig
drivers/s390/cio/qdio_main.c

Merge remote-tracking branch 'slave-dma/next'

Merge remote-tracking branch 'scsi/master'

Merge remote-tracking branch 'ibft/master'

Merge remote-tracking branch 'swiotlb/master'

Merge remote-tracking branch 'ieee1394/for-next'

Merge remote-tracking branch 'infiniband/for-next'

Merge remote-tracking branch 'libata/NEXT'

Merge remote-tracking branch 'kconfig/for-next'

Merge remote-tracking branch 'kbuild/for-next'

Merge remote-tracking branch 'docs/docs-move'

Merge branch 'quilt/kernel-doc'

Merge remote-tracking branch 'hwmon-staging/hwmon-next'

Merge branch 'quilt/jdelvare-hwmon'

Merge remote-tracking branch 'bjdooks-i2c/next-i2c'

Merge branch 'quilt/i2c'

Merge remote-tracking branch 'hid/for-next'

Merge remote-tracking branch 'xfs/master'

Conflicts:
fs/xfs/xfs_aops.c
fs/xfs/xfs_super.c

Merge remote-tracking branch 'v9fs/for-next'

Merge remote-tracking branch 'ocfs2/linux-next'

Merge remote-tracking branch 'nfsd/nfsd-next'

Merge remote-tracking branch 'logfs/master'

Merge remote-tracking branch 'gfs2/master'

Merge remote-tracking branch 'ext4/dev'

Merge remote-tracking branch 'ceph/for-next'

Merge remote-tracking branch 'xtensa/master'

Merge remote-tracking branch 'unicore32/unicore32'

Merge remote-tracking branch 'tile/master'

Merge remote-tracking branch 'rmobile/rmobile-latest'

Merge remote-tracking branch 'sh/sh-latest'

Merge remote-tracking branch 's390/features'

Merge remote-tracking branch '52xx-and-virtex/powerpc/next'

Merge remote-tracking branch 'powerpc/next'

Merge remote-tracking branch 'mips/mips-for-linux-next'

Merge remote-tracking branch 'm68knommu/for-next'

Merge remote-tracking branch 'm68k/for-next'

Merge remote-tracking branch 'ia64/test'

Merge branch 'quilt/hexagon'

Merge remote-tracking branch 'cris/for-next'

Merge remote-tracking branch 'blackfin/for-linus'

Merge remote-tracking branch 's5p/for-next'

Conflicts:
drivers/gpio/Makefile

Merge remote-tracking branch 'i.MX/for-next'

Conflicts:
arch/arm/mach-imx/Makefile

Merge remote-tracking branch 'at91/at91-next'

Merge remote-tracking branch 'arm-soc/for-next'

Conflicts:
Documentation/devicetree/bindings/arm/l2cc.txt
arch/arm/mach-at91/board-usb-a9260.c
arch/arm/mach-msm/board-msm8x60.c
arch/arm/mach-mxs/include/mach/gpio.h
arch/arm/mach-nuc93x/Makefile.boot
arch/arm/mach-u300/Makefile.boot
arch/arm/mm/cache-l2x0.c
arch/arm/plat-mxc/include/mach/gpio.h

Merge remote-tracking branch 'arm-lpae/for-next'

Conflicts:
arch/arm/include/asm/page.h
arch/arm/include/asm/pgalloc.h
arch/arm/include/asm/pgtable-hwdef.h
arch/arm/include/asm/pgtable.h
arch/arm/include/asm/tlb.h
arch/arm/kernel/head.S
arch/arm/kernel/sleep.S
arch/arm/mm/dma-mapping.c
arch/arm/mm/mmu.c

Merge remote-tracking branch 'arm/for-next'

Merge remote-tracking branch 'wireless-current/master'

Merge remote-tracking branch 'pci-current/for-linus'

Merge remote-tracking branch 'scsi-rc-fixes/master'

Merge remote-tracking branch 'arm-current/fixes'

Initial EXPERIMENTAL implementation of device-mapper thin provisioning
with snapshot support.  The 'thin' target is used to create instances of
the virtual devices that are hosted in the 'thin-pool' target.  The
thin-pool target provides data sharing among devices.  This sharing is
made possible using the persistent-data library in the previous patch.

The main highlight of this implementation, compared to the previous
implementation of snapshots, is that it allows many virtual devices to
be stored on the same data volume, simplifying administration and
allowing sharing of data between volumes (thus reducing disk usage).

Another big feature is support for arbitrary depth of recursive
snapshots (snapshots of snapshots of snapshots ...).  The previous
implementation of snapshots did this by chaining together lookup tables,
and so performance was O(depth).  This new implementation uses a single
data structure so we don't get this degradation with depth.

For further information and examples of how to use this, please read
Documentation/device-mapper/thin-provisioning.txt

Signed-off-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

The persistent-data library offers a re-usable framework for the storage
and management of on-disk metadata in device-mapper targets.

It's used by the thin-provisioning target in the next patch and in an
upcoming hierarchical storage target.

For further information, please read
Documentation/device-mapper/persistent-data.txt

Signed-off-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Export dm_get_md() for the new thin provisioning target to use.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Add a target feature flag to indicate that a target does not work in
read-only mode.

The thin provisioning target uses this.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Introduce the concept of a singleton table which contains exactly one target.

If a target type sets the DM_TARGET_SINGLETON feature bit device-mapper
will ensure that any table that includes that target contains no others.

The thin provisioning pool target uses this.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>

This patch introduces dm_kcopyd_zero() to make it easy to use
kcopyd to write zeros into the requested areas instead
instead of copying.  It is implemented by passing a NULL
copying source to dm_kcopyd_copy().

The forthcoming thin provisioning target uses this.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

Since set_current_state() contains a memory barrier in it,
an additional barrier isn't needed.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

printk_ratelimit() shares global ratelimiting state with all
other subsystems, so its usage is discouraged. Instead,
define and use dm's local state.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>