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lockref: add a lockref_init helper

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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>
Link: https://lore.kernel.org/r/20250115094702.504610-6-hch@lst.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christoph Hellwig
2025-01-15 10:46:41 +01:00
committed by Christian Brauner
parent 25d8060418
commit 63440d1c6d
1 changed files with 11 additions and 0 deletions
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11
include/linux/lockref.h
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@@ -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);