Merge tag 'v3.10.17' into dev-kernel-3.10

This is the 3.10.17 stable release

Conflicts:
	drivers/usb/host/xhci.c

Change-Id: I6bd3b15ff92a0b94568b9d02e9bb1036becfca20

2 files changed, 20 insertions, 13 deletions

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index b5ccba22603b..1101d92635c3 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -558,7 +558,7 @@ static void cputime_adjust(struct task_cputime *curr,
 			   struct cputime *prev,
 			   cputime_t *ut, cputime_t *st)
 {
-	cputime_t rtime, stime, utime, total;
+	cputime_t rtime, stime, utime;
 
 	if (vtime_accounting_enabled()) {
 		*ut = curr->utime;
@@ -566,9 +566,6 @@ static void cputime_adjust(struct task_cputime *curr,
 		return;
 	}
 
-	stime = curr->stime;
-	total = stime + curr->utime;
-
 	/*
 	 * Tick based cputime accounting depend on random scheduling
 	 * timeslices of a task to be interrupted or not by the timer.
@@ -589,13 +586,19 @@ static void cputime_adjust(struct task_cputime *curr,
 	if (prev->stime + prev->utime >= rtime)
 		goto out;
 
-	if (total) {
+	stime = curr->stime;
+	utime = curr->utime;
+
+	if (utime == 0) {
+		stime = rtime;
+	} else if (stime == 0) {
+		utime = rtime;
+	} else {
+		cputime_t total = stime + utime;
+
 		stime = scale_stime((__force u64)stime,
 				    (__force u64)rtime, (__force u64)total);
 		utime = rtime - stime;
-	} else {
-		stime = rtime;
-		utime = 0;
 	}
 
 	/*
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 03b73bea33d6..009a62bb859d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5778,11 +5778,15 @@ static void task_fork_fair(struct task_struct *p)
 	cfs_rq = task_cfs_rq(current);
 	curr = cfs_rq->curr;
 
-	if (unlikely(task_cpu(p) != this_cpu)) {
-		rcu_read_lock();
-		__set_task_cpu(p, this_cpu);
-		rcu_read_unlock();
-	}
+	/*
+	 * Not only the cpu but also the task_group of the parent might have
+	 * been changed after parent->se.parent,cfs_rq were copied to
+	 * child->se.parent,cfs_rq. So call __set_task_cpu() to make those
+	 * of child point to valid ones.
+	 */
+	rcu_read_lock();
+	__set_task_cpu(p, this_cpu);
+	rcu_read_unlock();
 
 	update_curr(cfs_rq);