mutex subsystem, -V14

this is version 14 of the generic mutex subsystem, against v2.6.15.

The patch-queue consists of 21 patches, which can also be downloaded 
from:

  http://redhat.com/~mingo/generic-mutex-subsystem/

Changes since -V13:

 13 files changed, 113 insertions(+), 85 deletions(-)

 - VFS: converted sb->s_lock to a mutex too. This improves the
   create+unlink benchmark on ext3.

 - further simplification of __mutex_lock_common(): no more gotos, and
   only one atomic_xchg() is done. Code size is now extremely small on 
   both UP and SMP:

   text    data     bss     dec     hex filename
    398       0       0     398     18e mutex.o.UP

   text    data     bss     dec     hex filename
    463       0       0     463     1cf mutex.o.SMP

 - synchro-test updates: max # of threads of 64, fairness stats,
   better defaults if =y, cleanups. (David Howells, me)

 - FASTCALL -> fastcall in mutex.h (suggested by David Howells)

 - documentation updates

	Ingo
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