[ACPI] Shorten the times IRQs are disabled in throttling.

During calculations no disabling is necessary.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.de>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/processor_throttling.c

@@ -69,12 +69,12 @@ acpi_processor_get_throttling (
 
 	pr->throttling.state = 0;
 
-	local_irq_disable();
-
 	duty_mask = pr->throttling.state_count - 1;
 
 	duty_mask <<= pr->throttling.duty_offset;
 
+	local_irq_disable();
+
 	value = inl(pr->throttling.address);
 
 	/*
@@ -123,8 +123,6 @@ int acpi_processor_set_throttling (
 	if (state == pr->throttling.state)
 		return_VALUE(0);
 
-	local_irq_disable();
-
 	/*
 	 * Calculate the duty_value and duty_mask.
 	 */
@@ -140,6 +138,8 @@ int acpi_processor_set_throttling (
 		duty_mask = ~duty_mask;
 	}
 
+	local_irq_disable();
+
 	/*
 	 * Disable throttling by writing a 0 to bit 4.  Note that we must
 	 * turn it off before you can change the duty_value.