[for-next,6/6] tracing: Remove cond argument from __DECLARE_TRACE_SYSCALL

Commit Message

Steven Rostedt Nov. 24, 2024, 11:49 p.m. UTC

From: Mathieu Desnoyers <[e-mail]>

Syscall tracepoints do not require a "cond" argument, because they are
meant to be used only for sys_enter and sys_exit instrumentation, which
don't require condition evaluation.

Cc: Linus Torvalds <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Michael Jeanson <[e-mail]>
Cc: Masami Hiramatsu <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Alexei Starovoitov <[e-mail]>
Cc: Yonghong Song <[e-mail]>
Cc: Paul E. McKenney <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Arnaldo Carvalho de Melo <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Cc: Alexander Shishkin <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Cc: Andrii Nakryiko <[e-mail]>
Cc: [e-mail]
Cc: Joel Fernandes <[e-mail]>
Cc: Jordan Rife <[e-mail]>
Cc: [e-mail]
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Mathieu Desnoyers <[e-mail]>
Signed-off-by: Steven Rostedt (Google) <[e-mail]>
---
 include/linux/tracepoint.h | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

Patch

diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 832f49b56b1f..b2633a72e871 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -220,7 +220,7 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
  * site if it is not watching, as it will need to be active when the
  * tracepoint is enabled.
  */
-#define __DECLARE_TRACE_COMMON(name, proto, args, cond, data_proto)	\
+#define __DECLARE_TRACE_COMMON(name, proto, args, data_proto)		\
 	extern int __traceiter_##name(data_proto);			\
 	DECLARE_STATIC_CALL(tp_func_##name, __traceiter_##name);	\
 	extern struct tracepoint __tracepoint_##name;			\
@@ -254,7 +254,7 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 	}
 
 #define __DECLARE_TRACE(name, proto, args, cond, data_proto)		\
-	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), cond, PARAMS(data_proto)) \
+	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
 	static inline void trace_##name(proto)				\
 	{								\
 		if (static_branch_unlikely(&__tracepoint_##name.key)) { \
@@ -269,18 +269,16 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 		}							\
 	}
 
-#define __DECLARE_TRACE_SYSCALL(name, proto, args, cond, data_proto)	\
-	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), cond, PARAMS(data_proto)) \
+#define __DECLARE_TRACE_SYSCALL(name, proto, args, data_proto)		\
+	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto)) \
 	static inline void trace_##name(proto)				\
 	{								\
 		might_fault();						\
 		if (static_branch_unlikely(&__tracepoint_##name.key)) {	\
-			if (cond) {					\
-				scoped_guard(rcu_tasks_trace)		\
-					__DO_TRACE_CALL(name, TP_ARGS(args)); \
-			}						\
+			scoped_guard(rcu_tasks_trace)			\
+				__DO_TRACE_CALL(name, TP_ARGS(args));	\
 		}							\
-		if (IS_ENABLED(CONFIG_LOCKDEP) && (cond)) {		\
+		if (IS_ENABLED(CONFIG_LOCKDEP)) {			\
 			WARN_ONCE(!rcu_is_watching(),			\
 				  "RCU not watching for tracepoint");	\
 		}							\
@@ -363,7 +361,7 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 
 
 #else /* !TRACEPOINTS_ENABLED */
-#define __DECLARE_TRACE(name, proto, args, cond, data_proto)		\
+#define __DECLARE_TRACE_COMMON(name, proto, args, data_proto)		\
 	static inline void trace_##name(proto)				\
 	{ }								\
 	static inline int						\
@@ -387,7 +385,11 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 		return false;						\
 	}
 
-#define __DECLARE_TRACE_SYSCALL	__DECLARE_TRACE
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto)		\
+	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto))
+
+#define __DECLARE_TRACE_SYSCALL(name, proto, args, data_proto)		\
+	__DECLARE_TRACE_COMMON(name, PARAMS(proto), PARAMS(args), PARAMS(data_proto))
 
 #define DEFINE_TRACE_FN(name, reg, unreg, proto, args)
 #define DEFINE_TRACE_SYSCALL(name, reg, unreg, proto, args)
@@ -453,7 +455,6 @@  static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 
 #define DECLARE_TRACE_SYSCALL(name, proto, args)			\
 	__DECLARE_TRACE_SYSCALL(name, PARAMS(proto), PARAMS(args),	\
-				cpu_online(raw_smp_processor_id()),	\
 				PARAMS(void *__data, proto))
 
 #define TRACE_EVENT_FLAGS(event, flag)