---

yaml --- r: 97793 b: refs/heads/master c: 06e1e4f h: refs/heads/master i: 97791: 9c65fb1 v: v3
git-mirror · Jun 6, 2008 · fc338c6 · fc338c6
1 parent 2b35a55
commit fc338c6
Show file tree

Hide file tree

Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 34397892a3d677d857fdaf8dec66a66b07dde0b5
+refs/heads/master: 06e1e4ffbd1932e288839b3140cda6b8141eb684
diff --git a/trunk/arch/um/os-Linux/time.c b/trunk/arch/um/os-Linux/time.c
@@ -106,6 +106,10 @@ static void deliver_alarm(void)
 	unsigned long long this_tick = os_nsecs();
 	int one_tick = UM_NSEC_PER_SEC / UM_HZ;
 
+	/* Protection against the host's time going backwards */
+	if ((last_tick != 0) && (this_tick < last_tick))
+		this_tick = last_tick;
+
 	if (last_tick == 0)
 		last_tick = this_tick - one_tick;
 
@@ -148,6 +152,9 @@ static int after_sleep_interval(struct timespec *ts)
 		start_usecs = usec;
 
 	start_usecs -= skew / UM_NSEC_PER_USEC;
+	if (start_usecs < 0)
+		start_usecs = 0;
+
 	tv = ((struct timeval) { .tv_sec  = start_usecs / UM_USEC_PER_SEC,
 				 .tv_usec = start_usecs % UM_USEC_PER_SEC });
 	interval = ((struct itimerval) { { 0, usec }, tv });