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[5/8] lockref: add a lockref_init helper

Message ID 20250115094702.504610-6-hch@lst.de (mailing list archive)
State New
Headers show
Series [1/8] lockref: remove lockref_put_not_zero | expand

Commit Message

Christoph Hellwig Jan. 15, 2025, 9:46 a.m. UTC 
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(+)
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Patch

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);