diff --git a/drivers/md/raid6algos.c b/drivers/md/raid6algos.c
index 77a6e4bf503d..21987e3dbe6c 100644
--- a/drivers/md/raid6algos.c
+++ b/drivers/md/raid6algos.c
@@ -121,7 +121,8 @@ int __init raid6_select_algo(void)
 			j0 = jiffies;
 			while ( (j1 = jiffies) == j0 )
 				cpu_relax();
-			while ( (jiffies-j1) < (1 << RAID6_TIME_JIFFIES_LG2) ) {
+			while (time_before(jiffies,
+					    j1 + (1<<RAID6_TIME_JIFFIES_LG2))) {
 				(*algo)->gen_syndrome(disks, PAGE_SIZE, dptrs);
 				perf++;
 			}