X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fhrtimer.c;h=dc8a4451d79b15d64a37caf55c9dc4595c6ec5d2;hb=0e647c04f665e9b3451a1ebe8252b38ffe0207c8;hp=065a89786628c392f2525158288c3b3a493620cb;hpb=820de5c39ef7f6866d2c9e6c7d208bcd2a6e1942;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 065a8978662..dc8a4451d79 100644
--- a/kernel/hrtimer.c
+++ b/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));
 
@@ -281,6 +277,30 @@ ktime_t ktime_add_ns(const ktime_t kt, u64 nsec)
 }
 
 EXPORT_SYMBOL_GPL(ktime_add_ns);
+
+/**
+ * ktime_sub_ns - Subtract a scalar nanoseconds value from a ktime_t variable
+ * @kt:		minuend
+ * @nsec:	the scalar nsec value to subtract
+ *
+ * Returns the subtraction of @nsec from @kt in ktime_t format
+ */
+ktime_t ktime_sub_ns(const ktime_t kt, u64 nsec)
+{
+	ktime_t tmp;
+
+	if (likely(nsec < NSEC_PER_SEC)) {
+		tmp.tv64 = nsec;
+	} else {
+		unsigned long rem = do_div(nsec, NSEC_PER_SEC);
+
+		tmp = ktime_set((long)nsec, rem);
+	}
+
+	return ktime_sub(kt, tmp);
+}
+
+EXPORT_SYMBOL_GPL(ktime_sub_ns);
 # endif /* !CONFIG_KTIME_SCALAR */
 
 /*
@@ -686,6 +706,7 @@ static void enqueue_hrtimer(struct hrtimer *timer,
 	struct rb_node **link = &base->active.rb_node;
 	struct rb_node *parent = NULL;
 	struct hrtimer *entry;
+	int leftmost = 1;
 
 	/*
 	 * Find the right place in the rbtree:
@@ -697,18 +718,19 @@ static void enqueue_hrtimer(struct hrtimer *timer,
 		 * We dont care about collisions. Nodes with
 		 * the same expiry time stay together.
 		 */
-		if (timer->expires.tv64 < entry->expires.tv64)
+		if (timer->expires.tv64 < entry->expires.tv64) {
 			link = &(*link)->rb_left;
-		else
+		} else {
 			link = &(*link)->rb_right;
+			leftmost = 0;
+		}
 	}
 
 	/*
 	 * Insert the timer to the rbtree and check whether it
 	 * replaces the first pending timer
 	 */
-	if (!base->first || timer->expires.tv64 <
-	    rb_entry(base->first, struct hrtimer, node)->expires.tv64) {
+	if (leftmost) {
 		/*
 		 * Reprogram the clock event device. When the timer is already
 		 * expired hrtimer_enqueue_reprogram has either called the