[PATCH 1/3] cleanup: provide DEFINE_LOCK_GUARD_ARGS()

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.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@linaro.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