Maria - post-review change of "fixes for gcc -ansi".

And reducing the time taken by my_atomic-t.


include/lf.h:
  fix to be able to add a ";" at the end of the macro's invokation
  (removing it here, removes a warning from "gcc -ansi" about a
  standalone ";").
mysys/lf_hash.c:
  ";" is ok now after LF_REQUIRE_PINS
mysys/mf_pagecache.c:
  comment fix
unittest/mysys/my_atomic-t.c:
  decreasing number of iterations to make test take less time.

include/lf.h

@@ -136,7 +136,7 @@ typedef struct {
 #if defined(__GNUC__) && defined(MY_LF_EXTRA_DEBUG)
 #define LF_REQUIRE_PINS(N)                                      \
   static const char require_pins[LF_PINBOX_PINS-N];             \
-  static const int LF_NUM_PINS_IN_THIS_FILE= N;
+  static const int LF_NUM_PINS_IN_THIS_FILE= N
 #define _lf_pin(PINS, PIN, ADDR)                                \
   (                                                             \
     assert(PIN < LF_NUM_PINS_IN_THIS_FILE),                     \

mysys/lf_hash.c

@@ -28,7 +28,7 @@
 #include <my_bit.h>
 #include <lf.h>
 
-LF_REQUIRE_PINS(3)
+LF_REQUIRE_PINS(3);
 
 /* An element of the list */
 typedef struct {

mysys/mf_pagecache.c

@@ -970,7 +970,7 @@ void change_pagecache_param(PAGECACHE *pagecache, uint division_limit,
 
 
 /*
-  Flushes and removes page cache from memory
+  Removes page cache from memory. Does NOT flush pages to disk.
 
   SYNOPSIS
     end_pagecache()

unittest/mysys/my_atomic-t.c

@@ -275,9 +275,9 @@ int main()
                &my_charset_bin);
 
 #ifdef MY_ATOMIC_MODE_RWLOCKS
-#define CYCLES 10000
+#define CYCLES 3000
 #else
-#define CYCLES 1000000
+#define CYCLES 300000
 #endif
 #define THREADS 100