1 files changed, 3 insertions, 2 deletions
diff --git a/include/hw/clock.h b/include/hw/clock.h
index 11f67fb970..7443e6c4ab 100644
--- a/include/hw/clock.h
+++ b/include/hw/clock.h
@@ -324,8 +324,9 @@ static inline uint64_t clock_ns_to_ticks(const Clock *clk, uint64_t ns)
         return 0;
     }
     /*
-     * Ignore divu128() return value as we've caught div-by-zero and don't
-     * need different behaviour for overflow.
+     * BUG: when CONFIG_INT128 is not defined, the current implementation of
+     * divu128 does not return a valid truncated quotient, so the result will
+     * be wrong.
      */
     divu128(&lo, &hi, clk->period);
     return lo;