linux-kernel - [PATCH rcu 12/20] srcu: Move SRCU Tree/Tiny definitions from srcu.h

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Message-Id: <20250224022214.12037-13-boqun.feng@gmail.com>
Date: Sun, 23 Feb 2025 18:22:06 -0800
From: Boqun Feng <boqun.feng@...il.com>
To: rcu@...r.kernel.org
Cc: Lai Jiangshan <jiangshanlai@...il.com>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Josh Triplett <josh@...htriplett.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	Joel Fernandes <joel@...lfernandes.org>,
	Boqun Feng <boqun.feng@...il.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Zqiang <qiang.zhang1211@...il.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Shuah Khan <shuah@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	bpf@...r.kernel.org,
	Alexei Starovoitov <ast@...nel.org>,
	Andrii Nakryiko <andrii@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>
Subject: [PATCH rcu 12/20] srcu: Move SRCU Tree/Tiny definitions from srcu.h

From: "Paul E. McKenney" <paulmck@...nel.org>

There are a couple of definitions under "#ifdef CONFIG_TINY_SRCU"
in include/linux/srcu.h.  There is no point in them being there,
so this commit moves them to include/linux/srcutiny.h and
include/linux/srcutree.c, thus eliminating that #ifdef.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Andrii Nakryiko <andrii@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: <bpf@...r.kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@...il.com>
---
 include/linux/srcu.h     | 10 +---------
 include/linux/srcutiny.h |  3 +++
 include/linux/srcutree.h |  1 +
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 505f5bdce444..2bd0e24e9b55 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -52,6 +52,7 @@ int init_srcu_struct(struct srcu_struct *ssp);
 #define SRCU_READ_FLAVOR_SLOWGP	SRCU_READ_FLAVOR_LITE
 						// Flavors requiring synchronize_rcu()
 						// instead of smp_mb().
+void __srcu_read_unlock(struct srcu_struct *ssp, int idx) __releases(ssp);
 
 #ifdef CONFIG_TINY_SRCU
 #include <linux/srcutiny.h>
@@ -64,15 +65,6 @@ int init_srcu_struct(struct srcu_struct *ssp);
 void call_srcu(struct srcu_struct *ssp, struct rcu_head *head,
 		void (*func)(struct rcu_head *head));
 void cleanup_srcu_struct(struct srcu_struct *ssp);
-int __srcu_read_lock(struct srcu_struct *ssp) __acquires(ssp);
-void __srcu_read_unlock(struct srcu_struct *ssp, int idx) __releases(ssp);
-#ifdef CONFIG_TINY_SRCU
-#define __srcu_read_lock_lite __srcu_read_lock
-#define __srcu_read_unlock_lite __srcu_read_unlock
-#else // #ifdef CONFIG_TINY_SRCU
-int __srcu_read_lock_lite(struct srcu_struct *ssp) __acquires(ssp);
-void __srcu_read_unlock_lite(struct srcu_struct *ssp, int idx) __releases(ssp);
-#endif // #else // #ifdef CONFIG_TINY_SRCU
 void synchronize_srcu(struct srcu_struct *ssp);
 
 #define SRCU_GET_STATE_COMPLETED 0x1
diff --git a/include/linux/srcutiny.h b/include/linux/srcutiny.h
index b347bde1aac2..a6194f7a7e34 100644
--- a/include/linux/srcutiny.h
+++ b/include/linux/srcutiny.h
@@ -71,6 +71,9 @@ static inline int __srcu_read_lock(struct srcu_struct *ssp)
 	return idx;
 }
 
+#define __srcu_read_lock_lite __srcu_read_lock
+#define __srcu_read_unlock_lite __srcu_read_unlock
+
 static inline void synchronize_srcu_expedited(struct srcu_struct *ssp)
 {
 	synchronize_srcu(ssp);
diff --git a/include/linux/srcutree.h b/include/linux/srcutree.h
index 55fa400624bb..ef3065c0cadc 100644
--- a/include/linux/srcutree.h
+++ b/include/linux/srcutree.h
@@ -207,6 +207,7 @@ struct srcu_struct {
 #define DEFINE_SRCU(name)		__DEFINE_SRCU(name, /* not static */)
 #define DEFINE_STATIC_SRCU(name)	__DEFINE_SRCU(name, static)
 
+int __srcu_read_lock(struct srcu_struct *ssp) __acquires(ssp);
 void synchronize_srcu_expedited(struct srcu_struct *ssp);
 void srcu_barrier(struct srcu_struct *ssp);
 void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf);
-- 
2.39.5 (Apple Git-154)