--- a/kernel/timer.c

+++ b/kernel/timer.c

@@ -763,7 +763,7 @@ unsigned long apply_slack(struct timer_l

if (mask == 0)

return expires;

- bit = find_last_bit(&mask, BITS_PER_LONG);

+ bit = __fls(mask);

mask = (1 << bit) - 1;