Merge 4.4.172 into android-4.4

Changes in 4.4.172
	tty/ldsem: Wake up readers after timed out down_write()
	can: gw: ensure DLC boundaries after CAN frame modification
	f2fs: clean up argument of recover_data
	f2fs: cover more area with nat_tree_lock
	f2fs: move sanity checking of cp into get_valid_checkpoint
	f2fs: fix to convert inline directory correctly
	f2fs: give -EINVAL for norecovery and rw mount
	f2fs: remove an obsolete variable
	f2fs: factor out fsync inode entry operations
	f2fs: fix inode cache leak
	f2fs: fix to avoid reading out encrypted data in page cache
	f2fs: not allow to write illegal blkaddr
	f2fs: avoid unneeded loop in build_sit_entries
	f2fs: use crc and cp version to determine roll-forward recovery
	f2fs: introduce get_checkpoint_version for cleanup
	f2fs: put directory inodes before checkpoint in roll-forward recovery
	f2fs: fix to determine start_cp_addr by sbi->cur_cp_pack
	f2fs: detect wrong layout
	f2fs: free meta pages if sanity check for ckpt is failed
	f2fs: fix race condition in between free nid allocator/initializer
	f2fs: return error during fill_super
	f2fs: check blkaddr more accuratly before issue a bio
	f2fs: sanity check on sit entry
	f2fs: enhance sanity_check_raw_super() to avoid potential overflow
	f2fs: clean up with is_valid_blkaddr()
	f2fs: introduce and spread verify_blkaddr
	f2fs: fix to do sanity check with secs_per_zone
	f2fs: fix to do sanity check with user_block_count
	f2fs: Add sanity_check_inode() function
	f2fs: fix to do sanity check with node footer and iblocks
	f2fs: fix to do sanity check with reserved blkaddr of inline inode
	f2fs: fix to do sanity check with block address in main area
	f2fs: fix to do sanity check with block address in main area v2
	f2fs: fix to do sanity check with cp_pack_start_sum
	f2fs: fix invalid memory access
	f2fs: fix missing up_read
	f2fs: fix validation of the block count in sanity_check_raw_super
	media: em28xx: Fix misplaced reset of dev->v4l::field_count
	proc: Remove empty line in /proc/self/status
	arm64/kvm: consistently handle host HCR_EL2 flags
	arm64: Don't trap host pointer auth use to EL2
	ipv6: fix kernel-infoleak in ipv6_local_error()
	net: bridge: fix a bug on using a neighbour cache entry without checking its state
	packet: Do not leak dev refcounts on error exit
	ip: on queued skb use skb_header_pointer instead of pskb_may_pull
	crypto: authencesn - Avoid twice completion call in decrypt path
	crypto: authenc - fix parsing key with misaligned rta_len
	btrfs: wait on ordered extents on abort cleanup
	Yama: Check for pid death before checking ancestry
	scsi: sd: Fix cache_type_store()
	mips: fix n32 compat_ipc_parse_version
	mfd: tps6586x: Handle interrupts on suspend
	Disable MSI also when pcie-octeon.pcie_disable on
	omap2fb: Fix stack memory disclosure
	media: vivid: fix error handling of kthread_run
	media: vivid: set min width/height to a value > 0
	LSM: Check for NULL cred-security on free
	media: vb2: vb2_mmap: move lock up
	sunrpc: handle ENOMEM in rpcb_getport_async
	selinux: fix GPF on invalid policy
	sctp: allocate sctp_sockaddr_entry with kzalloc
	tipc: fix uninit-value in tipc_nl_compat_link_reset_stats
	tipc: fix uninit-value in tipc_nl_compat_bearer_enable
	tipc: fix uninit-value in tipc_nl_compat_link_set
	tipc: fix uninit-value in tipc_nl_compat_name_table_dump
	tipc: fix uninit-value in tipc_nl_compat_doit
	block/loop: Use global lock for ioctl() operation.
	loop: Fold __loop_release into loop_release
	loop: Get rid of loop_index_mutex
	loop: Fix double mutex_unlock(&loop_ctl_mutex) in loop_control_ioctl()
	drm/fb-helper: Ignore the value of fb_var_screeninfo.pixclock
	media: vb2: be sure to unlock mutex on errors
	r8169: Add support for new Realtek Ethernet
	ipv6: Consider sk_bound_dev_if when binding a socket to a v4 mapped address
	ipv6: Take rcu_read_lock in __inet6_bind for mapped addresses
	xfs: don't fail when converting shortform attr to long form during ATTR_REPLACE
	platform/x86: asus-wmi: Tell the EC the OS will handle the display off hotkey
	e1000e: allow non-monotonic SYSTIM readings
	writeback: don't decrement wb->refcnt if !wb->bdi
	MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur
	arm64: perf: set suppress_bind_attrs flag to true
	jffs2: Fix use of uninitialized delayed_work, lockdep breakage
	pstore/ram: Do not treat empty buffers as valid
	powerpc/pseries/cpuidle: Fix preempt warning
	media: firewire: Fix app_info parameter type in avc_ca{,_app}_info
	net: call sk_dst_reset when set SO_DONTROUTE
	scsi: target: use consistent left-aligned ASCII INQUIRY data
	clk: imx6q: reset exclusive gates on init
	kconfig: fix file name and line number of warn_ignored_character()
	kconfig: fix memory leak when EOF is encountered in quotation
	mmc: atmel-mci: do not assume idle after atmci_request_end
	perf intel-pt: Fix error with config term "pt=0"
	perf svghelper: Fix unchecked usage of strncpy()
	perf parse-events: Fix unchecked usage of strncpy()
	dm kcopyd: Fix bug causing workqueue stalls
	dm snapshot: Fix excessive memory usage and workqueue stalls
	ALSA: bebob: fix model-id of unit for Apogee Ensemble
	sysfs: Disable lockdep for driver bind/unbind files
	scsi: megaraid: fix out-of-bound array accesses
	ocfs2: fix panic due to unrecovered local alloc
	mm/page-writeback.c: don't break integrity writeback on ->writepage() error
	mm, proc: be more verbose about unstable VMA flags in /proc/<pid>/smaps
	net: speed up skb_rbtree_purge()
	ipmi:ssif: Fix handling of multi-part return messages
	Linux 4.4.172

Change-Id: I02fc31d06efaf5fa116c7db95e7a543757f592ff
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --cc Documentation/filesystems/proc.txt
index d157847,5b87946..9b8aad3
--- 1/Documentation/filesystems/proc.txt
--- 2/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@@ -470,11 -466,10 +470,13 @@@ manner. The codes are the following
  
  Note that there is no guarantee that every flag and associated mnemonic will
  be present in all further kernel releases. Things get changed, the flags may
- be vanished or the reverse -- new added.
+ be vanished or the reverse -- new added. Interpretation of their meaning
+ might change in future as well. So each consumer of these flags has to
+ follow each specific kernel version for the exact semantic.
  
 +The "Name" field will only be present on a mapping that has been named by
 +userspace, and will show the name passed in by userspace.
 +
  This file is only present if the CONFIG_MMU kernel configuration option is
  enabled.
  

diff --cc Makefile
Simple merge

diff --cc arch/arm64/kernel/head.S
index 5dfc0ff,0382eba..6e6d6a4
--- 1/arch/arm64/kernel/head.S
--- 2/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@@ -30,8 -29,8 +30,9 @@@
  #include <asm/asm-offsets.h>
  #include <asm/cache.h>
  #include <asm/cputype.h>
 +#include <asm/elf.h>
  #include <asm/kernel-pgtable.h>
+ #include <asm/kvm_arm.h>
  #include <asm/memory.h>
  #include <asm/pgtable-hwdef.h>
  #include <asm/pgtable.h>

diff --cc arch/arm64/kvm/hyp.S
Simple merge

diff --cc arch/mips/Kconfig
Simple merge

diff --cc drivers/block/loop.c
Simple merge

diff --cc drivers/md/dm-snap.c
index e4d1baf,5d37977..2a855e5
--- 1/drivers/md/dm-snap.c
--- 2/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@@ -1601,7 -1625,9 +1622,8 @@@ static void start_full_bio(struct dm_sn
  
        pe->full_bio = bio;
        pe->full_bio_end_io = bio->bi_end_io;
 -      pe->full_bio_private = bio->bi_private;
  
+       down(&s->cow_count);
        callback_data = dm_kcopyd_prepare_callback(s->kcopyd_client,
                                                   copy_callback, pe);
  

diff --cc fs/pstore/ram_core.c
Simple merge

diff --cc include/linux/backing-dev-defs.h
Simple merge

diff --cc mm/page-writeback.c
Simple merge

diff --cc net/core/sock.c
Simple merge

diff --cc net/ipv6/af_inet6.c
Simple merge

diff --cc net/ipv6/datagram.c
Simple merge

diff --cc security/security.c
Simple merge