[PATCH v6 0/9] tracing: MIPS: add misc fixups and cleanups

[Wu Zhangjin <wuzhangjin@gmail.com>]

From: Wu Zhangjin <wuzhangjin@gmail.com>

This patchset adds misc fixups and cleanups for Ftrace of MIPS:

  + Fix the support of 32bit support with -mmcount-ra-address of gcc 4.5
    o tracing: MIPS: mcount.S: Fixup of the 32bit support with gcc 4.5
      The argument is passed by $12 in 32bit, not t0.
    o tracing: MIPS: Fixup of the 32bit support with -mmcount-ra-address
      For 32bit kernel, the offset of "b 1f" should be 5 instructions, not only 4.
 
  + Speedup the dynamic function tracer
    o tracing: MIPS: Reduce the overhead of dynamic Function Tracer
      In the old implementation, we have encode the 'nop' instruction and the
      instruction of calling to mcount at run-time, which may add some
      overhead.  We reduce this overhead via encoding them when initializing
      the dynamic function tracer.

  + Lots of cleanups
    o The other patches.

----------------

Changes from v5:

  o splits up the old v5 revision into several patches to make the maintainer
  happier to review it.

Regards,
	Wu Zhangjin

Wu Zhangjin (9):
  tracing: MIPS: mcount.S: merge the same continuous #ifdefs
  tracing: MIPS: mcount.S: Fixup of the 32bit support with gcc 4.5
  tracing: MIPS: mcount.S: cleanup the arguments of
    prepare_ftrace_return
  tracing: MIPS: mcount.S: cleanup of the comments
  tracing: MIPS: Fixup of the 32bit support with -mmcount-ra-address
  tracing: MIPS: cleanup of the instructions
  tracing: MIPS: Reduce the overhead of dynamic Function Tracer
  tracing: MIPS: cleanup of function graph tracer
  tracing: MIPS: cleanup of the address space checking

 arch/mips/kernel/ftrace.c |  179 +++++++++++++++++++++++++++------------------
 arch/mips/kernel/mcount.S |   49 +++++++-----
 2 files changed, 135 insertions(+), 93 deletions(-)