linux-kernel - [PATCH bpf-next v1 05/22] rqspinlock: Add rqspinlock.h header

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Message-ID: <20250107140004.2732830-6-memxor@gmail.com>
Date: Tue,  7 Jan 2025 05:59:47 -0800
From: Kumar Kartikeya Dwivedi <memxor@...il.com>
To: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Barret Rhoden <brho@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Waiman Long <llong@...hat.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrii Nakryiko <andrii@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Martin KaFai Lau <martin.lau@...nel.org>,
	Eduard Zingerman <eddyz87@...il.com>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Tejun Heo <tj@...nel.org>,
	Josh Don <joshdon@...gle.com>,
	Dohyun Kim <dohyunkim@...gle.com>,
	kernel-team@...a.com
Subject: [PATCH bpf-next v1 05/22] rqspinlock: Add rqspinlock.h header

This header contains the public declarations usable in the rest of the
kernel for rqspinlock.

Reviewed-by: Barret Rhoden <brho@...gle.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@...il.com>
---
 include/asm-generic/rqspinlock.h | 18 ++++++++++++++++++
 kernel/locking/rqspinlock.c      |  1 +
 2 files changed, 19 insertions(+)
 create mode 100644 include/asm-generic/rqspinlock.h

diff --git a/include/asm-generic/rqspinlock.h b/include/asm-generic/rqspinlock.h
new file mode 100644
index 000000000000..5c2cd3097fb2
--- /dev/null
+++ b/include/asm-generic/rqspinlock.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Resilient Queued Spin Lock
+ *
+ * (C) Copyright 2024 Meta Platforms, Inc. and affiliates.
+ *
+ * Authors: Kumar Kartikeya Dwivedi <memxor@...il.com>
+ */
+#ifndef __ASM_GENERIC_RQSPINLOCK_H
+#define __ASM_GENERIC_RQSPINLOCK_H
+
+#include <linux/types.h>
+
+struct qspinlock;
+
+extern void resilient_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val);
+
+#endif /* __ASM_GENERIC_RQSPINLOCK_H */
diff --git a/kernel/locking/rqspinlock.c b/kernel/locking/rqspinlock.c
index caaa7c9bbc79..b7920ae79410 100644
--- a/kernel/locking/rqspinlock.c
+++ b/kernel/locking/rqspinlock.c
@@ -23,6 +23,7 @@
 #include <asm/byteorder.h>
 #include <asm/qspinlock.h>
 #include <trace/events/lock.h>
+#include <asm/rqspinlock.h>
 
 /*
  * Include queued spinlock definitions and statistics code
-- 
2.43.5