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Matthew Wilcox (Oracle) 0a890e2209 XArray: add xas_split 
commit 8fc75643c5 upstream

In order to use multi-index entries for huge pages in the page cache, we
need to be able to split a multi-index entry (eg if a file is truncated in
the middle of a huge page entry).  This version does not support splitting
more than one level of the tree at a time.  This is an acceptable
limitation for the page cache as we do not expect to support order-12
pages in the near future.

[akpm@linux-foundation.org: export xas_split_alloc() to modules]
[willy@infradead.org: fix xarray split]
  Link: https://lkml.kernel.org/r/20200910175450.GV6583@casper.infradead.org
[willy@infradead.org: fix xarray]
  Link: https://lkml.kernel.org/r/20201001233943.GW20115@casper.infradead.org

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Qian Cai <cai@lca.pw>
Cc: Song Liu <songliubraving@fb.com>
Link: https://lkml.kernel.org/r/20200903183029.14930-3-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-10 13:37:14 +02:00
..
ABI
iio: improve IIO_CONCENTRATION channel type description
2020-08-19 08:16:07 +02:00
accounting
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admin-guide
dm integrity: conditionally disable "recalculate" feature
2021-01-30 13:54:10 +01:00
arm
ARM: 9012/1: move device tree mapping out of linear region
2021-05-19 10:08:32 +02:00
arm64
arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419
2020-04-29 16:32:56 +02:00
block
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bpf
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cdrom
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core-api
XArray: add xas_split
2021-06-10 13:37:14 +02:00
cpu-freq
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crypto
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dev-tools
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devicetree
dt-bindings: net: ethernet-controller: fix typo in NVMEM
2021-04-14 08:24:18 +02:00
doc-guide
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driver-api
ata: make qc_prep return ata_completion_errors
2020-10-01 13:18:26 +02:00
EDID
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fault-injection
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fb
fbdev: fix numbering of fbcon options
2020-02-24 08:36:42 +01:00
features
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filesystems
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2021-03-07 12:20:48 +01:00
firmware_class
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firmware-guide
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fpga
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gpu
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hid
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hwmon
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i2c
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ia64
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ide
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iio
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infiniband
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input
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ioctl
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isdn
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kbuild
kbuild: support LLVM=1 to switch the default tools to Clang/LLVM
2020-08-26 10:40:47 +02:00
kernel-hacking
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leds
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livepatch
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locking
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m68k
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maintainer
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media
media: videodev2.h: RGB BT2020 and HSV are always full range
2020-11-05 11:43:15 +01:00
mic
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mips
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misc-devices
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netlabel
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networking
can: j1939: swap addr and pgn in the send example
2020-11-18 19:20:19 +01:00
nios2
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openrisc
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parisc
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PCI
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pcmcia
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power
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powerpc
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process
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RCU
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riscv
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s390
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scheduler
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scsi
scsi: smartpqi: Update attribute name to driver_version
2020-01-17 19:48:27 +01:00
security
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sh
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sound
ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixups
2020-04-17 10:50:08 +02:00
sparc
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sphinx
tweewide: Fix most Shebang lines
2021-05-22 11:38:30 +02:00
sphinx-static
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spi
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target
tweewide: Fix most Shebang lines
2021-05-22 11:38:30 +02:00
timers
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trace
tweewide: Fix most Shebang lines
2021-05-22 11:38:30 +02:00
translations
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usb
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userspace-api
Documentation: seccomp: Fix user notification documentation
2021-06-03 08:59:03 +02:00
virt
KVM: arm64: Reject VM creation when the default IPA size is unsupported
2021-03-17 17:03:57 +01:00
virtual
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vm
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w1
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watchdog
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x86
x86/CPU/AMD: Save AMD NodeId as cpu_die_id
2020-12-30 11:51:47 +01:00
xtensa
xtensa: fix TLBTEMP area placement
2020-11-24 13:29:22 +01:00
.gitignore
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asm-annotations.rst
linkage: Introduce new macros for assembler symbols
2020-11-10 12:37:24 +01:00
atomic_bitops.txt
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atomic_t.txt
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bus-virt-phys-mapping.txt
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Changes
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CodingStyle
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conf.py
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COPYING-logo
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crc32.txt
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debugging-modules.txt
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debugging-via-ohci1394.txt
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digsig.txt
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DMA-API-HOWTO.txt
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DMA-API.txt
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DMA-attributes.txt
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DMA-ISA-LPC.txt
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docutils.conf
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dontdiff
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futex-requeue-pi.txt
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hwspinlock.txt
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index.rst
linkage: Introduce new macros for assembler symbols
2020-11-10 12:37:24 +01:00
io_ordering.txt
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io-mapping.txt
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IPMI.txt
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IRQ-affinity.txt
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IRQ-domain.txt
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IRQ.txt
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irqflags-tracing.txt
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Kconfig
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kobject.txt
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kprobes.txt
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kref.txt
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logo.gif
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lzo.txt
lib/lzo: fix ambiguous encoding bug in lzo-rle
2020-06-17 16:40:28 +02:00
mailbox.txt
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Makefile
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memory-barriers.txt
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nommu-mmap.txt
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padata.txt
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percpu-rw-semaphore.txt
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pi-futex.txt
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preempt-locking.txt
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rbtree.txt
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remoteproc.txt
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robust-futex-ABI.txt
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robust-futexes.txt
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rpmsg.txt
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speculation.txt
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static-keys.txt
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SubmittingPatches
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tee.txt
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this_cpu_ops.txt
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unaligned-memory-access.txt
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xz.txt
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