---

yaml
---
r: 62879
b: refs/heads/master
c: a941735
h: refs/heads/master
i:
  62877: fd1bcff
  62875: 1c0357b
  62871: e33dba5
  62863: f0fe9a0
  62847: 738901c
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d37c85571904a622cbabc7a2e04b8c919de75ac0
+refs/heads/master: a9417357cff6027f9d6b1740f821baa59f2381f4

trunk/drivers/rtc/class.c

@@ -46,6 +46,7 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
 {
 	struct rtc_device	*rtc = to_rtc_device(dev);
 	struct rtc_time		tm;
+	struct timespec		ts = current_kernel_time();
 
 	if (strncmp(rtc->dev.bus_id,
 				CONFIG_RTC_HCTOSYS_DEVICE,
@@ -57,8 +58,8 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
 
 	/* RTC precision is 1 second; adjust delta for avg 1/2 sec err */
 	set_normalized_timespec(&delta,
-				xtime.tv_sec - oldtime,
-				xtime.tv_nsec - (NSEC_PER_SEC >> 1));
+				ts.tv_sec - oldtime,
+				ts.tv_nsec - (NSEC_PER_SEC >> 1));
 
 	return 0;
 }

trunk/drivers/s390/net/ctcmain.c

@@ -674,7 +674,7 @@ ch_action_txdone(fsm_instance * fi, int event, void *arg)
 	int first = 1;
 	int i;
 	unsigned long duration;
-	struct timespec done_stamp = xtime;
+	struct timespec done_stamp = current_kernel_time();
 
 	DBF_TEXT(trace, 4, __FUNCTION__);
 
@@ -730,7 +730,7 @@ ch_action_txdone(fsm_instance * fi, int event, void *arg)
 		spin_unlock(&ch->collect_lock);
 		ch->ccw[1].count = ch->trans_skb->len;
 		fsm_addtimer(&ch->timer, CTC_TIMEOUT_5SEC, CH_EVENT_TIMER, ch);
-		ch->prof.send_stamp = xtime;
+		ch->prof.send_stamp = current_kernel_time();
 		rc = ccw_device_start(ch->cdev, &ch->ccw[0],
 				      (unsigned long) ch, 0xff, 0);
 		ch->prof.doios_multi++;
@@ -2281,7 +2281,7 @@ transmit_skb(struct channel *ch, struct sk_buff *skb)
 		fsm_newstate(ch->fsm, CH_STATE_TX);
 		fsm_addtimer(&ch->timer, CTC_TIMEOUT_5SEC, CH_EVENT_TIMER, ch);
 		spin_lock_irqsave(get_ccwdev_lock(ch->cdev), saveflags);
-		ch->prof.send_stamp = xtime;
+		ch->prof.send_stamp = current_kernel_time();
 		rc = ccw_device_start(ch->cdev, &ch->ccw[ccw_idx],
 				      (unsigned long) ch, 0xff, 0);
 		spin_unlock_irqrestore(get_ccwdev_lock(ch->cdev), saveflags);

trunk/drivers/s390/net/netiucv.c

@@ -753,7 +753,7 @@ static void conn_action_txdone(fsm_instance *fi, int event, void *arg)
 
 	header.next = 0;
 	memcpy(skb_put(conn->tx_buff, NETIUCV_HDRLEN), &header, NETIUCV_HDRLEN);
-	conn->prof.send_stamp = xtime;
+	conn->prof.send_stamp = current_kernel_time();
 	txmsg.class = 0;
 	txmsg.tag = 0;
 	rc = iucv_message_send(conn->path, &txmsg, 0, 0,
@@ -1185,7 +1185,7 @@ static int netiucv_transmit_skb(struct iucv_connection *conn,
 		memcpy(skb_put(nskb, NETIUCV_HDRLEN), &header,  NETIUCV_HDRLEN);
 
 		fsm_newstate(conn->fsm, CONN_STATE_TX);
-		conn->prof.send_stamp = xtime;
+		conn->prof.send_stamp = current_kernel_time();
 
 		msg.tag = 1;
 		msg.class = 0;

trunk/include/linux/time.h

@@ -99,15 +99,11 @@ extern int update_persistent_clock(struct timespec now);
 extern int no_sync_cmos_clock __read_mostly;
 void timekeeping_init(void);
 
-static inline unsigned long get_seconds(void)
-{
-	return xtime.tv_sec;
-}
-
+unsigned long get_seconds(void);
 struct timespec current_kernel_time(void);
 
 #define CURRENT_TIME		(current_kernel_time())
-#define CURRENT_TIME_SEC	((struct timespec) { xtime.tv_sec, 0 })
+#define CURRENT_TIME_SEC	((struct timespec) { get_seconds(), 0 })
 
 extern void do_gettimeofday(struct timeval *tv);
 extern int do_settimeofday(struct timespec *tv);

trunk/kernel/acct.c

@@ -468,7 +468,7 @@ static void do_acct_process(struct file *file)
 	}
 #endif
 	do_div(elapsed, AHZ);
-	ac.ac_btime = xtime.tv_sec - elapsed;
+	ac.ac_btime = get_seconds() - elapsed;
 	/* we really need to bite the bullet and change layout */
 	ac.ac_uid = current->uid;
 	ac.ac_gid = current->gid;

trunk/kernel/hrtimer.c

@@ -141,11 +141,7 @@ static void hrtimer_get_softirq_time(struct hrtimer_cpu_base *base)
 
 	do {
 		seq = read_seqbegin(&xtime_lock);
-#ifdef CONFIG_NO_HZ
-		getnstimeofday(&xts);
-#else
-		xts = xtime;
-#endif
+		xts = current_kernel_time();
 		tom = wall_to_monotonic;
 	} while (read_seqretry(&xtime_lock, seq));
 

trunk/kernel/time.c

@@ -215,22 +215,6 @@ asmlinkage long sys_adjtimex(struct timex __user *txc_p)
 	return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret;
 }
 
-inline struct timespec current_kernel_time(void)
-{
-        struct timespec now;
-        unsigned long seq;
-
-	do {
-		seq = read_seqbegin(&xtime_lock);
-
-		now = xtime;
-	} while (read_seqretry(&xtime_lock, seq));
-
-	return now; 
-}
-
-EXPORT_SYMBOL(current_kernel_time);
-
 /**
  * current_fs_time - Return FS time
  * @sb: Superblock.

trunk/kernel/time/timekeeping.c

@@ -47,10 +47,22 @@ EXPORT_SYMBOL(xtime_lock);
 struct timespec xtime __attribute__ ((aligned (16)));
 struct timespec wall_to_monotonic __attribute__ ((aligned (16)));
 static unsigned long total_sleep_time;		/* seconds */
-
 EXPORT_SYMBOL(xtime);
 
 
+#ifdef CONFIG_NO_HZ
+static struct timespec xtime_cache __attribute__ ((aligned (16)));
+static inline void update_xtime_cache(u64 nsec)
+{
+	xtime_cache = xtime;
+	timespec_add_ns(&xtime_cache, nsec);
+}
+#else
+#define xtime_cache xtime
+/* We do *not* want to evaluate the argument for this case */
+#define update_xtime_cache(n) do { } while (0)
+#endif
+
 static struct clocksource *clock; /* pointer to current clocksource */
 
 
@@ -478,6 +490,8 @@ void update_wall_time(void)
 	xtime.tv_nsec = (s64)clock->xtime_nsec >> clock->shift;
 	clock->xtime_nsec -= (s64)xtime.tv_nsec << clock->shift;
 
+	update_xtime_cache(cyc2ns(clock, offset));
+
 	/* check to see if there is a new clocksource to use */
 	change_clocksource();
 	update_vsyscall(&xtime, clock);
@@ -509,3 +523,25 @@ void monotonic_to_bootbased(struct timespec *ts)
 {
 	ts->tv_sec += total_sleep_time;
 }
+
+unsigned long get_seconds(void)
+{
+	return xtime_cache.tv_sec;
+}
+EXPORT_SYMBOL(get_seconds);
+
+
+struct timespec current_kernel_time(void)
+{
+	struct timespec now;
+	unsigned long seq;
+
+	do {
+		seq = read_seqbegin(&xtime_lock);
+
+		now = xtime_cache;
+	} while (read_seqretry(&xtime_lock, seq));
+
+	return now;
+}
+EXPORT_SYMBOL(current_kernel_time);

trunk/kernel/tsacct.c

@@ -39,7 +39,7 @@ void bacct_add_tsk(struct taskstats *stats, struct task_struct *tsk)
 	ac_etime = timespec_to_ns(&ts);
 	do_div(ac_etime, NSEC_PER_USEC);
 	stats->ac_etime = ac_etime;
-	stats->ac_btime = xtime.tv_sec - ts.tv_sec;
+	stats->ac_btime = get_seconds() - ts.tv_sec;
 	if (thread_group_leader(tsk)) {
 		stats->ac_exitcode = tsk->exit_code;
 		if (tsk->flags & PF_FORKNOEXEC)

trunk/net/rxrpc/af_rxrpc.c

@@ -787,7 +787,7 @@ static int __init af_rxrpc_init(void)
 
 	BUILD_BUG_ON(sizeof(struct rxrpc_skb_priv) > sizeof(dummy_skb->cb));
 
-	rxrpc_epoch = htonl(xtime.tv_sec);
+	rxrpc_epoch = htonl(get_seconds());
 
 	ret = -ENOMEM;
 	rxrpc_call_jar = kmem_cache_create(

trunk/net/rxrpc/ar-connection.c

@@ -791,7 +791,7 @@ void rxrpc_put_connection(struct rxrpc_connection *conn)
 
 	ASSERTCMP(atomic_read(&conn->usage), >, 0);
 
-	conn->put_time = xtime.tv_sec;
+	conn->put_time = get_seconds();
 	if (atomic_dec_and_test(&conn->usage)) {
 		_debug("zombie");
 		rxrpc_queue_delayed_work(&rxrpc_connection_reap, 0);
@@ -835,7 +835,7 @@ void rxrpc_connection_reaper(struct work_struct *work)
 
 	_enter("");
 
-	now = xtime.tv_sec;
+	now = get_seconds();
 	earliest = ULONG_MAX;
 
 	write_lock_bh(&rxrpc_connection_lock);

trunk/net/rxrpc/ar-transport.c

@@ -183,7 +183,7 @@ void rxrpc_put_transport(struct rxrpc_transport *trans)
 
 	ASSERTCMP(atomic_read(&trans->usage), >, 0);
 
-	trans->put_time = xtime.tv_sec;
+	trans->put_time = get_seconds();
 	if (unlikely(atomic_dec_and_test(&trans->usage)))
 		_debug("zombie");
 		/* let the reaper determine the timeout to avoid a race with
@@ -219,7 +219,7 @@ static void rxrpc_transport_reaper(struct work_struct *work)
 
 	_enter("");
 
-	now = xtime.tv_sec;
+	now = get_seconds();
 	earliest = ULONG_MAX;
 
 	/* extract all the transports that have been dead too long */

trunk/net/rxrpc/rxkad.c

@@ -916,7 +916,7 @@ static int rxkad_decrypt_ticket(struct rxrpc_connection *conn,
 		issue = be32_to_cpu(stamp);
 	}
 	p += 4;
-	now = xtime.tv_sec;
+	now = get_seconds();
 	_debug("KIV ISSUE: %lx [%lx]", issue, now);
 
 	/* check the ticket is in date */