[PATCH] hrtimer: create and use timespec_valid macro

add timespec_valid(ts) [returns false if the timespec is denorm]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
index 4d49cabb9b47..64e797464589 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -44,6 +44,12 @@ extern unsigned long mktime(const unsigned int year, const unsigned int mon,
 
 extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
 
+/*
+ * Returns true if the timespec is norm, false if denorm:
+ */
+#define timespec_valid(ts) \
+        (((ts)->tv_sec >= 0) && (((unsigned) (ts)->tv_nsec) < NSEC_PER_SEC))
+
 extern struct timespec xtime;
 extern struct timespec wall_to_monotonic;
 extern seqlock_t xtime_lock;