1 files changed, 7 insertions, 2 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 6c1ecbdc0db9..eaf6751e7612 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1340,8 +1340,13 @@ calc_delta_mine(unsigned long delta_exec, unsigned long weight,
 {
         u64 tmp;
 
-        if (!lw->inv_weight)
-                lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)/(lw->weight+1);
+        if (!lw->inv_weight) {
+                if (BITS_PER_LONG > 32 && unlikely(lw->weight >= WMULT_CONST))
+                        lw->inv_weight = 1;
+                else
+                        lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)
+                                / (lw->weight+1);
+        }
 
         tmp = (u64)delta_exec * weight;
         /*