[PATCH] irqlock fixes

Add irq_enter/exit to smp_call_function_interrupt():
arch/i386/kernel/microcode.c:do_microcode_update() calls
smp_call_function(do_update_one).  do_update_one() does
spin_lock/unlock.

Remove unneeded GET_THREAD_INFO(%ebx) in device_not_available() trap in
entry.S

arch/i386/kernel/entry.S

@@ -417,7 +417,6 @@ ENTRY(simd_coprocessor_error)
 ENTRY(device_not_available)
 	pushl $-1			# mark this as an int
 	SAVE_ALL
-	GET_THREAD_INFO(%ebx)
 	movl %cr0, %eax
 	testl $0x4, %eax		# EM (math emulation bit)
 	jne device_not_available_emulate

arch/i386/kernel/smp.c

@@ -646,7 +646,10 @@ asmlinkage void smp_call_function_interrupt(void)
 	/*
 	 * At this point the info structure may be out of scope unless wait==1
 	 */
+	irq_enter();
 	(*func)(info);
+	irq_exit();
+
 	if (wait) {
 		mb();
 		atomic_inc(&call_data->finished);