[PATCH] lockdep: irqtrace subsystem, core

Accurate hard-IRQ-flags and softirq-flags state tracing.

This allows us to attach extra functionality to IRQ flags on/off
events (such as trace-on/off).

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/powerpc/kernel/irq.c

@@ -429,7 +429,7 @@ void do_softirq(void)
 		local_bh_disable();
 		do_softirq_onstack();
 		account_system_vtime(current);
-		__local_bh_enable();
+		_local_bh_enable();
 	}
 
 	local_irq_restore(flags);