ntpd: remove some code which is at best unneeded and at worst wrong

function                                             old     new   delta
step_time                                            246     256     +10
ntpd_main                                            855     844     -11
update_local_clock                                   767     714     -53

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/ntpd.c b/networking/ntpd.c
index aca79c95ad4d7013eb5e3f1f46fbbd12b8010ccd..95dfdb1197e4b699fc6bde9bc23e7b9269441ab3 100644 (file)
--- a/networking/ntpd.c
+++ b/networking/ntpd.c
@@ -294,7 +294,6 @@ struct globals {
 #define G_precision_sec  (1.0 / (1 << (- G_precision_exp)))
        uint8_t  stratum;
        /* Bool. After set to 1, never goes back to 0: */
-       smallint adjtimex_was_done;
        smallint initial_poll_complete;
 
 #define STATE_NSET      0       /* initial state, "nothing is set" */
@@ -813,6 +812,7 @@ step_time(double offset)
        /* Globals: */
        G.cur_time -= offset;
        G.last_update_recv_time -= offset;
+       G.last_script_run -= offset;
 }
 
 
@@ -1171,7 +1171,6 @@ static NOINLINE int
 update_local_clock(peer_t *p)
 {
        int rc;
-       long old_tmx_offset;
        struct timex tmx;
        /* Note: can use G.cluster_offset instead: */
        double offset = p->filter_offset;
@@ -1423,17 +1422,6 @@ update_local_clock(peer_t *p)
                                tmx.freq, tmx.offset, tmx.constant, tmx.status);
        }
 
-       old_tmx_offset = 0;
-       if (!G.adjtimex_was_done) {
-               G.adjtimex_was_done = 1;
-               /* When we use adjtimex for the very first time,
-                * we need to ADD to pre-existing tmx.offset - it may be !0
-                */
-               memset(&tmx, 0, sizeof(tmx));
-               if (adjtimex(&tmx) < 0)
-                       bb_perror_msg_and_die("adjtimex");
-               old_tmx_offset = tmx.offset;
-       }
        memset(&tmx, 0, sizeof(tmx));
 #if 0
 //doesn't work, offset remains 0 (!) in kernel:
@@ -1446,9 +1434,8 @@ update_local_clock(peer_t *p)
        tmx.offset = G.last_update_offset * 1000000; /* usec */
 #endif
        tmx.modes = ADJ_OFFSET | ADJ_STATUS | ADJ_TIMECONST;// | ADJ_MAXERROR | ADJ_ESTERROR;
-       tmx.offset = (G.last_update_offset * 1000000) /* usec */
+       tmx.offset = (G.last_update_offset * 1000000); /* usec */
                        /* + (G.last_update_offset < 0 ? -0.5 : 0.5) - too small to bother */
-                       + old_tmx_offset; /* almost always 0 */
        tmx.status = STA_PLL;
        if (G.ntp_status & LI_PLUSSEC)
                tmx.status |= STA_INS;
@@ -2020,9 +2007,7 @@ int ntpd_main(int argc UNUSED_PARAM, char **argv)
                nfds = poll(pfd, i, timeout * 1000);
                gettime1900d(); /* sets G.cur_time */
                if (nfds <= 0) {
-                       if (G.adjtimex_was_done
-                        && G.cur_time - G.last_script_run > 11*60
-                       ) {
+                       if (G.cur_time - G.last_script_run > 11*60) {
                                /* Useful for updating battery-backed RTC and such */
                                run_script("periodic", G.last_update_offset);
                                gettime1900d(); /* sets G.cur_time */