Documentation/atomic_ops.txt: avoid volatile in sample code

As declaring counter as volatile is discouraged, it is best not to use it
in sample code as well.

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/atomic_ops.txt b/Documentation/atomic_ops.txt
index ac4d471..3bd585b 100644
--- a/Documentation/atomic_ops.txt
+++ b/Documentation/atomic_ops.txt
@@ -12,7 +12,7 @@
 C integer type will fail.  Something like the following should
 suffice:
 
-	typedef struct { volatile int counter; } atomic_t;
+	typedef struct { int counter; } atomic_t;
 
 Historically, counter has been declared volatile.  This is now discouraged.
 See Documentation/volatile-considered-harmful.txt for the complete rationale.