Hi,

Here next version of the SMP alternatives patch.

Had a more detailed look at the bits generated, the vast majority in the 
smp alternatives table where simply lock prefixes.  So I decided to 
specical-case these to keep the table sizes small.  There are three elf 
sections now:

   .smp_altinstructions
   .smp_altinstr_replacement
       These are pretty much the same like the existing non-smp
       alternative bits, with the exception that the replacement
       table also has some space to keep the original instruction, to
       allow patching both SMP->UP and back UP->SMP.  It's used to patch
       the code for spinlocks with simpler UP versions.

   .smp_locks
       List of pointers to the lock prefixes to be NOP'ed for UP.

For the core kernel these three sections are grouped together and are 
page-aligned, so they can be freed.  Freeing happens automatically in 
some cases where they not needed any more after booting up (UP system 
found, kernel without CONFIG_HOTPLUG_CPU).  There is also a kernel cmd 
line option to force the tables being released.

For modules only the .smp_locks section is handled, the other ones 
simply don't appear in modules ;)

cheers,

   Gerd