stats: bugfix: use timersub() and timeradd()

tv_sub() had a bug: if 'a' represented the same time as 'b' then it
added extra 1000000 usecs.

1 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 65dff9b..9afa02c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2011-12-05 Jiri Olsa <olsajiri@gmail.com>
+	* stats bugfix - use timersub() and timeradd()
+	  (contributed by Akos Pasztory <akos.pasztory@gmail.com>)
+
 2011-09-05 Jiri Olsa <olsajiri@gmail.com>
 	* Fixes paraller building like 'make -j16'
 	  (contributed by Tapani Pälli <tapani.palli@intel.com>)