[GIT PULL] ARM: hw_breakpoint: fixes and improvements

[will.deacon@arm.com (Will Deacon)]

Hi Russell,

Please pull these hw_breakpoint patches, they address a number
of issues and corner-cases with the current implementation.

Thanks,

Will



The following changes since commit e8a7e48bb248a1196484d3f8afa53bded2b24e71:
  Linus Torvalds (1):
        Linux 2.6.37-rc4

are available in the git repository at:

  git://linux-arm.org/linux-2.6-wd.git hw-breakpoint

Will Deacon (11):
      ARM: hw_breakpoint: ensure OS lock is clear before writing to debug registers
      ARM: hw_breakpoint: reset control registers in hotplug path
      ARM: hw_breakpoint: correct and simplify alignment fixup code
      ARM: hw_breakpoint: disable preemption during debug exception handling
      ARM: hw_breakpoint: don't advertise reserved breakpoints
      ARM: hw_breakpoint: do not allocate new breakpoints with preemption disabled
      ARM: hw_breakpoint: unify single-stepping code for watchpoints and breakpoints
      ARM: hw_breakpoint: disallow per-cpu breakpoints without overflow handler
      ARM: ptrace: fix style issue with hw_breakpoint interface
      ARM: hw_breakpoint: fix warnings generated by sparse
      ARM: hw_breakpoint: do not fail initcall if monitor mode is disabled

 arch/arm/include/asm/hw_breakpoint.h |    4 +-
 arch/arm/kernel/entry-armv.S         |    4 +
 arch/arm/kernel/entry-header.S       |   19 ++
 arch/arm/kernel/hw_breakpoint.c      |  551 ++++++++++++++++++++--------------
 arch/arm/kernel/ptrace.c             |    4 +-
 5 files changed, 354 insertions(+), 228 deletions(-)