x86: I/O APIC: keep the timer IRQ masked during set-up

Keep the timer interrupt line masked when reconfiguring its interrupt
redirection entry in the I/O APIC.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/io_apic_32.c

@@ -1316,7 +1316,7 @@ static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
 	 * to the first CPU.
 	 */
 	entry.dest_mode = INT_DEST_MODE;
-	entry.mask = 0;					/* unmask IRQ now */
+	entry.mask = 1;					/* mask IRQ now */
 	entry.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
 	entry.delivery_mode = INT_DELIVERY_MODE;
 	entry.polarity = 0;

arch/x86/kernel/io_apic_64.c

@@ -911,7 +911,7 @@ static void __init setup_timer_IRQ0_pin(unsigned int apic, unsigned int pin,
 	 * to the first CPU.
 	 */
 	entry.dest_mode = INT_DEST_MODE;
-	entry.mask = 0;					/* unmask IRQ now */
+	entry.mask = 1;					/* mask IRQ now */
 	entry.dest = cpu_mask_to_apicid(TARGET_CPUS);
 	entry.delivery_mode = INT_DELIVERY_MODE;
 	entry.polarity = 0;