[PATCH] rest_init() local irq fix

It's not necessary to keep IRQs disabled after the BKL has been dropped.
In fact i think IRQ-disabling doesnt have to be done at all, the patch
below ought to solve this scenario equally well, and should solve the PPC
side-effects too.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

init/main.c

@@ -373,13 +373,8 @@ static void noinline rest_init(void)
 {
 	kernel_thread(init, NULL, CLONE_FS | CLONE_SIGHAND);
 	numa_default_policy();
-	/*
-	 * Re-enable preemption but disable interrupts to make sure
-	 * we dont get preempted until we schedule() in cpu_idle().
-	 */
-	local_irq_disable();
-	preempt_enable_no_resched();
 	unlock_kernel();
+	preempt_enable_no_resched();
 	cpu_idle();
 }