- Merge sys32_rt_sigtimedwait function in X86_64, IA64, PPC64, MIPS,
  SPARC64, S390 32 bit layer into 1 compat_rt_sigtimedwait function.  It will
  also fix a bug of copy wrong information to 32 bit userspace siginfo
  structure on X86_64, IA64 and SPARC64 when calling sigtimedwait on 32 bit
  layer.

- Change all name the of siginfo_t32 structure in X86_64, IA64, MIPS,
  SPARC64 and S390 to the name compat_siginfo_t as used in PPC64.

- Patch introduced a macro __COMPAT_ENDIAN_SWAP__ in
  include/asm-mips/compat.h when MIPS kernel is compiled in little-endian
  mode.  This macro is used to do byte swapping in function
  sigset_from_compat.

- This patch is only tested on X86_64 and IA_64.
Signed-off-by: Zou Nan hai <Nanhai.zou@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>