1 files changed, 3 insertions, 2 deletions

diff --git a/kernel/printk.c b/kernel/printk.c
index 19c0d7bcf24a..357f714ddd49 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -870,10 +870,11 @@ static size_t print_time(u64 ts, char *buf)
         if (!printk_time)
                 return 0;
 
+        rem_nsec = do_div(ts, 1000000000);
+
         if (!buf)
-                return 15;
+                return snprintf(NULL, 0, "[%5lu.000000] ", (unsigned long)ts);
 
-        rem_nsec = do_div(ts, 1000000000);
         return sprintf(buf, "[%5lu.%06lu] ",
                        (unsigned long)ts, rem_nsec / 1000);
 }