From: Paul Jackson <pj@sgi.com>

Major rewrite of cpumask to use a single implementation, as a struct-wrapped
bitmap.

This patch leaves some 26 include/asm-*/cpumask*.h header files orphaned - to
be removed next patch.

Some nine cpumask macros for const variants and to coerce and promote between
an unsigned long and a cpumask are obsolete.  Simple emulation wrappers are
provided in this patch for these obsolete macros, which can be removed once
each of the 3 archs (i386, ppc64, x86_64) using them are recoded in follow-on
patches to not need them.

The CPU_MASK_ALL macro now avoids leaving possible garbage one bits in any
unused portion of the high word.

An inproved comment lists all available operators, for convenient browsing.

From: Mikael Pettersson <mikpe@csd.uu.se>

  2.6.7-rc3-mm1 changed CPU_MASK_NONE into something that isn't a valid
  rvalue (it only works inside struct initializers).  This caused compile-time
  errors in perfctr in UP x86 builds.

From: Arnd Bergmann <arnd@arndb.de>

  cpumask-5-10-rewrite-cpumaskh-single-bitmap-based from 2.6.7-rc3-mm1
  causes include2/asm/smp.h:54:1: warning: "cpu_online" redefined
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>