[PATCH] flush_tlb_all preempt safety for voyager

Patch from Thomas Schlichter <schlicht@uni-mannheim.de>

Make flush_tlb_all() preempt-safe.  Same as the ia32 fix.

arch/i386/mach-voyager/voyager_smp.c

@@ -1230,9 +1230,10 @@ flush_tlb_all_function(void* info)
 void
 flush_tlb_all(void)
 {
+	preempt_disable();
 	smp_call_function (flush_tlb_all_function, 0, 1, 1);
-
 	do_flush_tlb_all_local();
+	preempt_enable();
 }
 
 /* used to set up the trampoline for other CPUs when the memory manager