LU-4423 libcfs: tracefile document seconds overflow

[fs/lustre-release.git] / libcfs / libcfs / linux / linux-tracefile.c

diff --git a/libcfs/libcfs/linux/linux-tracefile.c b/libcfs/libcfs/linux/linux-tracefile.c
index 38edb50..6e08612 100644 (file)
--- a/libcfs/libcfs/linux/linux-tracefile.c
+++ b/libcfs/libcfs/linux/linux-tracefile.c
@@ -188,16 +188,19 @@ cfs_set_ptldebug_header(struct ptldebug_header *header,
                         struct libcfs_debug_msg_data *msgdata,
                         unsigned long stack)
 {
-       struct timeval tv;
+       struct timespec64 ts;
 
-       do_gettimeofday(&tv);
+       ktime_get_real_ts64(&ts);
 
        header->ph_subsys = msgdata->msg_subsys;
        header->ph_mask = msgdata->msg_mask;
        header->ph_cpu_id = smp_processor_id();
        header->ph_type = cfs_trace_buf_idx_get();
-       header->ph_sec = (__u32)tv.tv_sec;
-       header->ph_usec = tv.tv_usec;
+       /* y2038 safe since all user space treats this as unsigned, but
+        * will overflow in 2106
+        */
+       header->ph_sec = (u32)ts.tv_sec;
+       header->ph_usec = ts.tv_nsec / NSEC_PER_USEC;
        header->ph_stack = stack;
        header->ph_pid = current->pid;
        header->ph_line_num = msgdata->msg_line;