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* [PATCH 2/3] mm: mmap_lock: use DECLARE_EVENT_CLASS and DEFINE_EVENT_FN
@ 2021-07-29  9:28 Gang Li
  2021-07-29 17:28 ` Axel Rasmussen
  2021-07-30  2:46 ` Muchun Song
  0 siblings, 2 replies; 3+ messages in thread
From: Gang Li @ 2021-07-29  9:28 UTC (permalink / raw)
  To: rostedt
  Cc: mingo, akpm, vbabka, axelrasmussen, linux-kernel, linux-mm, Gang Li

By using DECLARE_EVENT_CLASS and TRACE_EVENT_FN, we can save a lot
of space from duplicate code.

Signed-off-by: Gang Li <ligang.bdlg@bytedance.com>
---
 include/trace/events/mmap_lock.h | 44 +++++++++-----------------------
 1 file changed, 12 insertions(+), 32 deletions(-)

diff --git a/include/trace/events/mmap_lock.h b/include/trace/events/mmap_lock.h
index 5f980c92e3e9..b9dd66f9c226 100644
--- a/include/trace/events/mmap_lock.h
+++ b/include/trace/events/mmap_lock.h
@@ -13,7 +13,7 @@ struct mm_struct;
 extern int trace_mmap_lock_reg(void);
 extern void trace_mmap_lock_unreg(void);
 
-TRACE_EVENT_FN(mmap_lock_start_locking,
+DECLARE_EVENT_CLASS(mmap_lock,
 
 	TP_PROTO(struct mm_struct *mm, const char *memcg_path, bool write),
 
@@ -36,11 +36,19 @@ TRACE_EVENT_FN(mmap_lock_start_locking,
 		__entry->mm,
 		__get_str(memcg_path),
 		__entry->write ? "true" : "false"
-	),
-
-	trace_mmap_lock_reg, trace_mmap_lock_unreg
+   )
 );
 
+#define DEFINE_MMAP_LOCK_EVENT(name)                                    \
+	DEFINE_EVENT_FN(mmap_lock, name,                                \
+		TP_PROTO(struct mm_struct *mm, const char *memcg_path,  \
+			bool write),                                    \
+		TP_ARGS(mm, memcg_path, write),                         \
+		trace_mmap_lock_reg, trace_mmap_lock_unreg)
+
+DEFINE_MMAP_LOCK_EVENT(mmap_lock_start_locking);
+DEFINE_MMAP_LOCK_EVENT(mmap_lock_released);
+
 TRACE_EVENT_FN(mmap_lock_acquire_returned,
 
 	TP_PROTO(struct mm_struct *mm, const char *memcg_path, bool write,
@@ -73,34 +81,6 @@ TRACE_EVENT_FN(mmap_lock_acquire_returned,
 	trace_mmap_lock_reg, trace_mmap_lock_unreg
 );
 
-TRACE_EVENT_FN(mmap_lock_released,
-
-	TP_PROTO(struct mm_struct *mm, const char *memcg_path, bool write),
-
-	TP_ARGS(mm, memcg_path, write),
-
-	TP_STRUCT__entry(
-		__field(struct mm_struct *, mm)
-		__string(memcg_path, memcg_path)
-		__field(bool, write)
-	),
-
-	TP_fast_assign(
-		__entry->mm = mm;
-		__assign_str(memcg_path, memcg_path);
-		__entry->write = write;
-	),
-
-	TP_printk(
-		"mm=%p memcg_path=%s write=%s",
-		__entry->mm,
-		__get_str(memcg_path),
-		__entry->write ? "true" : "false"
-	),
-
-	trace_mmap_lock_reg, trace_mmap_lock_unreg
-);
-
 #endif /* _TRACE_MMAP_LOCK_H */
 
 /* This part must be outside protection */
-- 
2.20.1



^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-07-30  2:47 UTC | newest]

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2021-07-29  9:28 [PATCH 2/3] mm: mmap_lock: use DECLARE_EVENT_CLASS and DEFINE_EVENT_FN Gang Li
2021-07-29 17:28 ` Axel Rasmussen
2021-07-30  2:46 ` Muchun Song

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