[PATCH 5/8] lockref: add a lockref_init helper

Christoph Hellwig
2025-01-15T09:47:19Z

Add a helper to initialize the lockdep, that is initialize the spinlock
and set a value. Having to open code them isn't a big deal, but having
an initializer feels right for a proper primitive.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/lockref.h | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/include/linux/lockref.h b/include/linux/lockref.h
index f821f46e9fb4..c39f119659ba 100644
--- a/include/linux/lockref.h
+++ b/include/linux/lockref.h
@@ -34,6 +34,17 @@ struct lockref {
};
};

+/**
+ * lockref_init - Initialize a lockref
+ * @lockref: pointer to lockref structure
+ * @count: initial count
+ */
+static inline void lockref_init(struct lockref *lockref, unsigned int count)
+{
+ spin_lock_init(&lockref->lock);
+ lockref->count = count;
+}
+
void lockref_get(struct lockref *lockref);
int lockref_put_return(struct lockref *lockref);
bool lockref_get_not_zero(struct lockref *lockref);
--
2.45.2