linux-kernel - [PATCH 1/3] cleanup: provide DEFINE_LOCK_GUARD

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Date: Wed, 10 Jan 2024 21:32:13 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>,
	Boqun Feng <boqun.feng@...il.com>
Cc: linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 1/3] cleanup: provide DEFINE_LOCK_GUARD_ARGS()

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

This macro allows defining lock guard with additional arguments that
can be passed to the locking function. This is useful for implementing
guards for nested locking.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 include/linux/cleanup.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/cleanup.h b/include/linux/cleanup.h
index c2d09bc4f976..921db45023bb 100644
--- a/include/linux/cleanup.h
+++ b/include/linux/cleanup.h
@@ -246,5 +246,11 @@ __DEFINE_LOCK_GUARD_0(_name, _lock)
 	static inline void * class_##_name##_ext##_lock_ptr(class_##_name##_t *_T) \
 	{ return class_##_name##_lock_ptr(_T); }
 
+/*
+ * Helper for implementing guard locks with additional arguments passed to
+ * the locking function.
+ */
+#define DEFINE_LOCK_GUARD_ARGS(_name, _type, _lock, _unlock, _args...)	\
+DEFINE_CLASS(_name, _type, _unlock, ({ _lock; _T; }), _type _T, _args)
 
 #endif /* __LINUX_GUARDS_H */
-- 
2.40.1