linux-kernel - [PATCH v2 26/35] percpu-rwsem.h: move declarations to percpu-rwsem

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Date: Fri,  9 Feb 2024 17:40:18 +0100
From: Max Kellermann <max.kellermann@...os.com>
To: linux-kernel@...r.kernel.org
Cc: Max Kellermann <max.kellermann@...os.com>
Subject: [PATCH v2 26/35] percpu-rwsem.h: move declarations to percpu-rwsem_types.h

By providing declarations in a lean header, we can reduce header
dependencies.

Signed-off-by: Max Kellermann <max.kellermann@...os.com>
---
 include/linux/cgroup-defs.h        |  2 +-
 include/linux/percpu-rwsem.h       | 15 +--------------
 include/linux/percpu-rwsem_types.h | 24 ++++++++++++++++++++++++
 3 files changed, 26 insertions(+), 15 deletions(-)
 create mode 100644 include/linux/percpu-rwsem_types.h

diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 878deefba0e1..691c50aeafae 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -16,7 +16,7 @@
 #include <linux/rcupdate.h>
 #include <linux/refcount_types.h>
 #include <linux/percpu-refcount_types.h>
-#include <linux/percpu-rwsem.h>
+#include <linux/percpu-rwsem_types.h>
 #include <linux/u64_stats_sync.h>
 #include <linux/workqueue.h>
 #include <linux/bpf-cgroup-defs.h>
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index 36b942b67b7d..0f427bd5217a 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -2,24 +2,11 @@
 #ifndef _LINUX_PERCPU_RWSEM_H
 #define _LINUX_PERCPU_RWSEM_H
 
+#include <linux/percpu-rwsem_types.h>
 #include <linux/atomic.h>
 #include <linux/percpu.h>
-#include <linux/rcuwait.h>
-#include <linux/wait.h>
-#include <linux/rcu_sync.h>
 #include <linux/lockdep.h>
 
-struct percpu_rw_semaphore {
-	struct rcu_sync		rss;
-	unsigned int __percpu	*read_count;
-	struct rcuwait		writer;
-	wait_queue_head_t	waiters;
-	atomic_t		block;
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-	struct lockdep_map	dep_map;
-#endif
-};
-
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 #define __PERCPU_RWSEM_DEP_MAP_INIT(lockname)	.dep_map = { .name = #lockname },
 #else
diff --git a/include/linux/percpu-rwsem_types.h b/include/linux/percpu-rwsem_types.h
new file mode 100644
index 000000000000..0716d08b758b
--- /dev/null
+++ b/include/linux/percpu-rwsem_types.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_PERCPU_RWSEM_TYPES_H
+#define _LINUX_PERCPU_RWSEM_TYPES_H
+
+#include <linux/rcu_sync.h>
+#include <linux/rcuwait.h>
+#include <linux/types.h>
+#include <linux/wait_types.h>
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+#include <linux/lockdep_types.h>
+#endif
+
+struct percpu_rw_semaphore {
+	struct rcu_sync		rss;
+	unsigned int __percpu	*read_count;
+	struct rcuwait		writer;
+	wait_queue_head_t	waiters;
+	atomic_t		block;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map	dep_map;
+#endif
+};
+
+#endif
-- 
2.39.2