linux-kernel - [for-next][PATCH 4/6] rcupdate_trace: Define rcu_tasks

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Message-ID: <20241124235019.106333158@goodmis.org>
Date: Sun, 24 Nov 2024 18:49:44 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Linus Torvalds <torvalds@...ux-foundation.org>,
 Thomas Gleixner <tglx@...utronix.de>,
 Michael Jeanson <mjeanson@...icios.com>,
 Peter Zijlstra <peterz@...radead.org>,
 Alexei Starovoitov <ast@...nel.org>,
 Yonghong Song <yhs@...com>,
 "Paul E. McKenney" <paulmck@...nel.org>,
 Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Namhyung Kim <namhyung@...nel.org>,
 Andrii Nakryiko <andrii.nakryiko@...il.com>,
 bpf@...r.kernel.org,
 Joel Fernandes <joel@...lfernandes.org>,
 Jordan Rife <jrife@...gle.com>,
 linux-trace-kernel@...r.kernel.org
Subject: [for-next][PATCH 4/6] rcupdate_trace: Define rcu_tasks_trace lock guard

From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>

Define a rcu_tasks_trace lock guard for use by the syscall enter/exit
tracepoints.

Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Michael Jeanson <mjeanson@...icios.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Yonghong Song <yhs@...com>
Cc: Paul E. McKenney <paulmck@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: bpf@...r.kernel.org
Cc: Joel Fernandes <joel@...lfernandes.org>
Cc: Jordan Rife <jrife@...gle.com>
Cc: linux-trace-kernel@...r.kernel.org
Link: https://lore.kernel.org/20241123153031.2884933-4-mathieu.desnoyers@efficios.com
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 include/linux/rcupdate_trace.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/rcupdate_trace.h b/include/linux/rcupdate_trace.h
index eda493200663..e6c44eb428ab 100644
--- a/include/linux/rcupdate_trace.h
+++ b/include/linux/rcupdate_trace.h
@@ -10,6 +10,7 @@

 #include <linux/sched.h>
 #include <linux/rcupdate.h>
+#include <linux/cleanup.h>

 extern struct lockdep_map rcu_trace_lock_map;

@@ -98,4 +99,8 @@ static inline void rcu_read_lock_trace(void) { BUG(); }
 static inline void rcu_read_unlock_trace(void) { BUG(); }
 #endif /* #ifdef CONFIG_TASKS_TRACE_RCU */

+DEFINE_LOCK_GUARD_0(rcu_tasks_trace,
+	rcu_read_lock_trace(),
+	rcu_read_unlock_trace())
+
 #endif /* __LINUX_RCUPDATE_TRACE_H */
-- 
2.45.2