tracing: Convert some kmem events to DEFINE_EVENT

Use DECLARE_EVENT_CLASS to remove duplicate code:

   text    data     bss     dec     hex filename
 333987   69800   27228  431015   693a7 mm/built-in.o.old
 330030   69800   27228  427058   68432 mm/built-in.o

8 events are converted:

  kmem_alloc: kmalloc, kmem_cache_alloc
  kmem_alloc_node: kmalloc_node, kmem_cache_alloc_node
  kmem_free: kfree, kmem_cache_free
  mm_page: mm_page_alloc_zone_locked, mm_page_pcpu_drain

No change in functionality.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
LKML-Reference: <4B0E286A.2000405@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 3 insertions, 4 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2bc2ac63f41e..bdb22f55d006 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -48,12 +48,14 @@
 #include <linux/page_cgroup.h>
 #include <linux/debugobjects.h>
 #include <linux/kmemleak.h>
-#include <trace/events/kmem.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
 #include "internal.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/kmem.h>
+
 /*
  * Array of node states.
  */
diff --git a/mm/util.c b/mm/util.c
index 7c35ad95f927..15d197571b4d 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -6,9 +6,6 @@
 #include <linux/sched.h>
 #include <asm/uaccess.h>
 
-#define CREATE_TRACE_POINTS
-#include <trace/events/kmem.h>
-
 /**
  * kstrdup - allocate space for and copy an existing string
  * @s: the string to duplicate