[patch] big IRQ lock removal, 2.5.27-F9

[Ingo Molnar]

the -F9 irqlock patch can be found at:

   http://redhat.com/~mingo/remove-irqlock-patches/remove-irqlock-2.5.27-F9

Changes in -F9:

 - replace all instances of:

	local_save_flags(flags);
	local_irq_disable();

   with the shorter form of:

	local_irq_save(flags);

  about 30 files are affected by this change.

Changes in -F8:

 - preempt/hardirq/softirq count separation, cleanups.

 - skbuff.c fix.

 - use irq_count() in scheduler_tick()

Changes in -F3:

 - the entry.S cleanups/speedups by Oleg Nesterov.

 - a rather critical synchronize_irq() bugfix: if a driver frees an 
   interrupt that is still being probed then synchronize_irq() locks up.
   This bug has caused a spurious boot-lockup on one of my testsystems,
   ifconfig would lock up trying to close eth0.

 - remove duplicate definitions from asm-i386/system.h, this fixes 
   compiler warnings.

	Ingo