Pull Hexagon fixes from Richard Kuo:
 "Changes for the Hexagon architecture (and one touching OpenRISC).

  They include various fixes to make use of additional arch features and
  cleanups.  The largest functional change is a cleanup of the signal
  and event return paths"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel: (32 commits)
  Hexagon: add v4 CS regs to core copyout macro
  Hexagon: use correct translation for VMALLOC_START
  Hexagon: use correct translations for DMA mappings
  Hexagon: fix return value for notify_resume case in do_work_pending
  Hexagon: fix signal number for user mem faults
  Hexagon: remove two Kconfig entries
  arch: remove CONFIG_GENERIC_FIND_NEXT_BIT again
  Hexagon: update copyright dates
  Hexagon: add translation types for __vmnewmap
  Hexagon: fix signal.c compile error
  Hexagon: break up user fn/arg register setting
  Hexagon: use generic sys_fork, sys_vfork, and sys_clone
  Hexagon: fix psp/sp macro
  Hexagon: fix up int enable/disable at ret_from_fork
  Hexagon: add IOMEM and _relaxed IO macros
  Hexagon: switch to using the device type for IO mappings
  Hexagon: don't print info for offline CPU's
  Hexagon: add support for single-stepping (v4+)
  Hexagon: use correct work mask when checking for more work
  Hexagon: add support for additional exceptions
  ...

We first tried to avoid updating atime/mtime entirely (commit
b0de59b5: "TTY: do not update atime/mtime on read/write"), and then
limited it to only update it occasionally (commit 37b7f3c7: "TTY:
fix atime/mtime regression"), but it turns out that this was both
insufficient and overkill.

It was insufficient because we let people attach to the shared ptmx node
to see activity without even reading atime/mtime, and it was overkill
because the "only once a minute" means that you can't really tell an
idle person from an active one with 'w'.

So this tries to fix the problem properly.  It marks the shared ptmx
node as un-notifiable, and it lowers the "only once a minute" to a few
seconds instead - still long enough that you can't time individual
keystrokes, but short enough that you can tell whether somebody is
active or not.
Reported-by: Simon Kirby <sim@hostway.ca>
Acked-by: Jiri Slaby <jslaby@suse.cz>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull compat cleanup from Al Viro:
 "Mostly about syscall wrappers this time; there will be another pile
  with patches in the same general area from various people, but I'd
  rather push those after both that and vfs.git pile are in."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
  syscalls.h: slightly reduce the jungles of macros
  get rid of union semop in sys_semctl(2) arguments
  make do_mremap() static
  sparc: no need to sign-extend in sync_file_range() wrapper
  ppc compat wrappers for add_key(2) and request_key(2) are pointless
  x86: trim sys_ia32.h
  x86: sys32_kill and sys32_mprotect are pointless
  get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC
  merge compat sys_ipc instances
  consolidate compat lookup_dcookie()
  convert vmsplice to COMPAT_SYSCALL_DEFINE
  switch getrusage() to COMPAT_SYSCALL_DEFINE
  switch epoll_pwait to COMPAT_SYSCALL_DEFINE
  convert sendfile{,64} to COMPAT_SYSCALL_DEFINE
  switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE
  make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
  make HAVE_SYSCALL_WRAPPERS unconditional
  consolidate cond_syscall and SYSCALL_ALIAS declarations
  teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long
  get rid of duplicate logics in __SC_....[1-6] definitions

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

With physical offsets, pa<->va translations aren't just based
on PAGE_OFFSET anymore.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

The Kconfig entries for HEXAGON_VM and HEXAGON_ANGEL_TRAPS were added,
together with the configuration and makefiles for the Hexagon
architecture, in v3.2. They have never been used. They can safely be
removed.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
[rkuo@codeaurora.org: adjust for line changes in Kconfig]
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

CONFIG_GENERIC_FIND_NEXT_BIT was removed in v3.0, but reappeared in two
architectures. Remove it again.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Based on feedback from Al Viro; previous-stack-pointer and
user reg for same should always be kept consistent.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Check return coming out of check_work_pending, and if copy_thread
passed us a function in r24, call it.  Based on feedback from Al
Viro.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Uncached on our architecture can still have side effects
such as canceled/replayed transactions; device type prevents
this.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Hardware single-step is only available on v4 and later
architectures.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Add multi-reg-write and unaligned-PC exceptions.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Use the exact number of pages needed to be mapped pre-VA-jump,
then map 896MB afterwards, which the arch mem init will fix up.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

This fixes the return value of sigreturn and moves the work pending check
into a c routine for readability and fixes the loop for multiple pending
signals.  Based on feedback from Al Viro.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Add support for a couple new v4+ registers, along with
newer save/restore pt_regs.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Add support for loading the kernel at a physical offset.  The
offset should still be 4M aligned.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

Merge third batch of fixes from Andrew Morton:
 "Most of the rest.  I still have two large patchsets against AIO and
  IPC, but they're a bit stuck behind other trees and I'm about to
  vanish for six days.

   - random fixlets
   - inotify
   - more of the MM queue
   - show_stack() cleanups
   - DMI update
   - kthread/workqueue things
   - compat cleanups
   - epoll udpates
   - binfmt updates
   - nilfs2
   - hfs
   - hfsplus
   - ptrace
   - kmod
   - coredump
   - kexec
   - rbtree
   - pids
   - pidns
   - pps
   - semaphore tweaks
   - some w1 patches
   - relay updates
   - core Kconfig changes
   - sysrq tweaks"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (109 commits)
  Documentation/sysrq: fix inconstistent help message of sysrq key
  ethernet/emac/sysrq: fix inconstistent help message of sysrq key
  sparc/sysrq: fix inconstistent help message of sysrq key
  powerpc/xmon/sysrq: fix inconstistent help message of sysrq key
  ARM/etm/sysrq: fix inconstistent help message of sysrq key
  power/sysrq: fix inconstistent help message of sysrq key
  kgdb/sysrq: fix inconstistent help message of sysrq key
  lib/decompress.c: fix initconst
  notifier-error-inject: fix module names in Kconfig
  kernel/sys.c: make prctl(PR_SET_MM) generally available
  UAPI: remove empty Kbuild files
  menuconfig: print more info for symbol without prompts
  init/Kconfig: re-order CONFIG_EXPERT options to fix menuconfig display
  kconfig menu: move Virtualization drivers near other virtualization options
  Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
  relay: use macro PAGE_ALIGN instead of FIX_SIZE
  kernel/relay.c: move FIX_SIZE macro into relay.c
  kernel/relay.c: remove unused function argument actor
  drivers/w1/slaves/w1_ds2760.c: fix the error handling in w1_ds2760_add_slave()
  drivers/w1/slaves/w1_ds2781.c: fix the error handling in w1_ds2781_add_slave()
  ...

Pull md fixes from NeilBrown:
 "A mixed bag of little fixes.  No real new functionality here.  Several
  patches are tagged for -stable."

* tag 'md-3.10' of git://neil.brown.name/md:
  MD: ignore discard request for hard disks of hybid raid1/raid10 array
  md: bad block list should default to disabled.
  md: raid1/raid10 md devices leak memory when stopping
  DM RAID: Add message/status support for changing sync action
  MD: Export 'md_reap_sync_thread' function
  md: don't update metadata when stopping a read-only array.
  md: Allow devices to be re-added to a read-only array.
  md/raid10: Allow skipping recovery when clean arrays are assembled
  MD: Fix typos in MD documentation
  md/raid5: avoid an extra write when writing to a known-bad-block.
  md/raid5: Change or of some order to improve efficiency.
  md: use set_bit_le and clear_bit_le
  md: HOT_DISK_REMOVE shouldn't make a read-auto device active.
  md: use common code for all calls to ->hot_remove_disk()
  md: never update metadata when array is read-only.

Currently help message of /proc/sysrq-trigger highlight its
upper-case characters, like below:

      SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E)
      memory-full-oom-kill(F) kill-all-tasks(I) ...

this would confuse user trigger sysrq by upper-case character, which is
inconsistent with the real lower-case character registed key.

This inconsistent help message will also lead more confused when
26 upper-case letters put into use in future.

This patch fix sysrq documentation.
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Currently help message of /proc/sysrq-trigger highlight its upper-case
characters, like below:

      SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E)
      memory-full-oom-kill(F) kill-all-tasks(I) ...

this would confuse user trigger sysrq by upper-case character, which is
inconsistent with the real lower-case character registed key.

This inconsistent help message will also lead more confused when
26 upper-case letters put into use in future.

This patch ethernet emac sysrq key: "emac(c)"
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Currently help message of /proc/sysrq-trigger highlight its
upper-case characters, like below:

      SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E)
      memory-full-oom-kill(F) kill-all-tasks(I) ...

this would confuse user trigger sysrq by upper-case character, which is
inconsistent with the real lower-case character registed key.

This inconsistent help message will also lead more confused when
26 upper-case letters put into use in future.

This patch fix spare sysrq key: "global-regs(y)"
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>