drivers: base: use standard device online/offline for state change

There are two ways to set the online/offline state for a memory block:
echo 0|1 > online and echo online|online_kernel|online_movable|offline >
state.

The state attribute can online a memory block with extra data, the
"online type", where the online attribute uses a default online type of
ONLINE_KEEP, same as echo online > state.

Currently there is a state_mutex that provides consistency between the
memory block state and the underlying memory.

The problem is that this code does a lot of things that the common
device layer can do for us, such as the serialization of the
online/offline handlers using the device lock, setting the dev->offline
field, and calling kobject_uevent().

This patch refactors the online/offline code to allow the common
device_[online|offline] functions to be used.  The result is a simpler
and more common code path for the two state setting mechanisms.  It also
removes the state_mutex from the struct memory_block as the memory block
device lock provides the state consistency.

No functional change is intended by this patch.

Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: add sysfs_create/remove_groups()

These functions are being open-coded in 3 different places in the driver
core, and other driver subsystems will want to start doing this as well,
so move it to the sysfs core to keep it all in one place, where we know
it is written properly.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group.c: move EXPORT_SYMBOL_GPL() to the proper location

This fixes up the coding style issue of incorrectly placing the
EXPORT_SYMBOL_GPL() macro, it should be right after the function itself,
not at the end of the file.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group.c: fix trailing whitespace

There was some trailing spaces in the file, fix that up.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group.c: fix up some * coding style issues

This fixes up the * coding style warnings for the group.c sysfs file.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group.c: fix up broken string coding style

checkpatch complains about the broken string in the file, and it's
correct, so fix it up.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group.c: add kerneldoc for sysfs_remove_group

sysfs_remove_group() never had kerneldoc, so add it, and fix up the
kerneldoc for sysfs_remove_groups() which didn't specify the parameters
properly.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: group: update copyright to add myself and the LF

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: fix placement of EXPORT_SYMBOL()

The export should happen after the function, not at the bottom of the
file, so fix that up.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: remove trailing whitespace

This removes all trailing whitespace errors in the sysfs code.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: fix up space coding style issues

This fixes up all of the space-related coding style issues for the sysfs
code.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sysfs: fix up 80 column coding style issues

This fixes up the 80 column coding style issues in the sysfs .c files.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge tag 'pinctrl-for-v3.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl fixes from Linus Walleij:
 "Fixes for the sunxi (AllWinner) pin control driver.  This was a new
  driver in this merge window, so some post-merge hardening is
  happening"

[ I had completely missed this pull request for some reason, it was sent
  over a week ago but my mailbox is chaotic ]

* tag 'pinctrl-for-v3.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: sunxi: Add spinlocks
  pinctrl: sunxi: Fix gpio_set behaviour
  pinctrl: sunxi: Read register before writing to it in irq_set_type
sysfs: fix up uaccess.h coding style warnings

This fixes the uaccess.h warnings in the sysfs.c files.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "Fixes for ARM and aarch64.

  This pull request is coming a bit later than I would have preferred,
  because I and Gleb happened to have holidays around the same weeks of
  August...  sorry about that"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: ARM: Squash len warning
  arm64: KVM: use 'int' instead of 'u32' for variable 'target' in kvm_host.h.
  arm64: KVM: add missing dsb before invalidating Stage-2 TLBs
  arm64: KVM: perform save/restore of PAR_EL1
  arm64: KVM: fix 2-level page tables unmapping
  ARM: KVM: Fix unaligned unmap_range leak
  ARM: KVM: Fix 64-bit coprocessor handling
sysfs: dir.c: fix up odd do/while indentation

This fixes up the odd do/while after an if statement warning in dir.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64

Pull arm64 perf fixes from Catalin Marinas:
 "Perf backend fixes for arm64 where the user can cause kernel panic
  (discovered with Vince's fuzzing tool)"

* tag 'arm64-stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64:
  arm64: perf: fix event validation for software group leaders
  arm64: perf: fix array out of bounds access in armpmu_map_hw_event()
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS fix from Ralf Baechle:
 "Just a single patch which fixes a special case in the MIPS FPU
  emulator which is always required, even on CPUs with FPU.  There is
  the rare special case that an FPU (or certain other instructions) in a
  branch delay slot is causing an exception and then the branch
  instruction will need to be emulated by the kernel before resuming
  execution.  This is working great except if the branch instruction is
  an Octeon BBIT instruction.

  The boring disclaimer - all MIPS defconfigs build tested and no
  regressions and runtime tested on Octeon, no known issues"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Handle OCTEON BBIT instructions in FPU emulator.
sysfs: file.c: fix up broken string warnings

This fixes the coding style warnings in fs/sysfs/file.c for broken
strings across lines.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
 - On ARM did not have balanced calls to get/put_cpu.
 - Fix to make tboot + Xen + Linux correctly.
 - Fix events VCPU binding issues.
 - Fix a vCPU online race where IPIs are sent to not-yet-online vCPU.

* tag 'stable/for-linus-3.11-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/smp: initialize IPI vectors before marking CPU online
  xen/events: mask events when changing their VCPU binding
  xen/events: initialize local per-cpu mask for all possible events
  x86/xen: do not identity map UNUSABLE regions in the machine E820
  xen/arm: missing put_cpu in xen_percpu_init