[ARM] 4066/1: correct a comment about PXA's sched_clock range

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/generic.c b/arch/arm/mach-pxa/generic.c
index 6ae605857ca9..9de1278d234f 100644
--- a/arch/arm/mach-pxa/generic.c
+++ b/arch/arm/mach-pxa/generic.c
@@ -76,7 +76,9 @@ unsigned long long sched_clock(void)
         /*
          * 96-bit math to perform tick * NSEC_PER_SEC / CLOCK_TICK_RATE for
          * any value of CLOCK_TICK_RATE. Max value is in the 80 thousand
-         * years range which is nice, but with higher computation cost.
+         * years range and truncation to unsigned long long limits it to
+         * sched_clock's max range of ~584 years.  This is nice but with
+         * higher computation cost.
          */
         {
                 union {