ACPICA: Add time macros for various timer/time manipulation.

[sfrench/cifs-2.6.git] / drivers / acpi / acpica / hwtimer.c

diff --git a/drivers/acpi/acpica/hwtimer.c b/drivers/acpi/acpica/hwtimer.c
index bfdce22f37988721385ff0d9f19131c2ff405a2d..4e741d85e6b4f2d051243869efe4baa234ec37e0 100644 (file)
--- a/drivers/acpi/acpica/hwtimer.c
+++ b/drivers/acpi/acpica/hwtimer.c
@@ -176,10 +176,11 @@ acpi_get_timer_duration(u32 start_ticks, u32 end_ticks, u32 * time_elapsed)
        /*
         * Compute Duration (Requires a 64-bit multiply and divide):
         *
-        * time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY;
+        * time_elapsed (microseconds) =
+        *  (delta_ticks * ACPI_USEC_PER_SEC) / ACPI_PM_TIMER_FREQUENCY;
         */
-       status = acpi_ut_short_divide(((u64) delta_ticks) * 1000000,
-                                     PM_TIMER_FREQUENCY, &quotient, NULL);
+       status = acpi_ut_short_divide(((u64)delta_ticks) * ACPI_USEC_PER_SEC,
+                                     ACPI_PM_TIMER_FREQUENCY, &quotient, NULL);
 
        *time_elapsed = (u32) quotient;
        return_ACPI_STATUS(status);