[PATCH] sched: Update scheduler stat documentation.

[Rakib Mullick <rakib.mullick@gmail.com>]

/proc/schedstat's second field reflect to # of time context switch happened not # of times switched to the expired queue.

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
---

diff --git a/Documentation/scheduler/sched-stats.txt b/Documentation/scheduler/sched-stats.txt
index 1cd5d51..7d8e12c 100644
--- a/Documentation/scheduler/sched-stats.txt
+++ b/Documentation/scheduler/sched-stats.txt
@@ -38,7 +38,8 @@ First field is a sched_yield() statistic:
      1) # of times sched_yield() was called
 
 Next three are schedule() statistics:
-     2) # of times we switched to the expired queue and reused it
+     2) # of times context switch happened. This field is not utilized these
+	days but kept for holding userspace tools integrity.
      3) # of times schedule() was called
      4) # of times schedule() left the processor idle