lockref: remove lockref_put_not_zero

lockref_put_not_zero is not used anywhere, and unless I'm missing
something didn't end up being used used at all.  Remove it.

Signed-off-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>

Author: Christoph Hellwig

include/linux/lockref.h

@@ -37,7 +37,6 @@ struct lockref {
 extern void lockref_get(struct lockref *);
 extern int lockref_put_return(struct lockref *);
 extern int lockref_get_not_zero(struct lockref *);
-extern int lockref_put_not_zero(struct lockref *);
 extern int lockref_put_or_lock(struct lockref *);
 
 extern void lockref_mark_dead(struct lockref *);

lib/lockref.c

@@ -81,34 +81,6 @@ int lockref_get_not_zero(struct lockref *lockref)
 }
 EXPORT_SYMBOL(lockref_get_not_zero);
 
-/**
- * lockref_put_not_zero - Decrements count unless count <= 1 before decrement
- * @lockref: pointer to lockref structure
- * Return: 1 if count updated successfully or 0 if count would become zero
- */
-int lockref_put_not_zero(struct lockref *lockref)
-{
-	int retval;
-
-	CMPXCHG_LOOP(
-		new.count--;
-		if (old.count <= 1)
-			return 0;
-	,
-		return 1;
-	);
-
-	spin_lock(&lockref->lock);
-	retval = 0;
-	if (lockref->count > 1) {
-		lockref->count--;
-		retval = 1;
-	}
-	spin_unlock(&lockref->lock);
-	return retval;
-}
-EXPORT_SYMBOL(lockref_put_not_zero);
-
 /**
  * lockref_put_return - Decrement reference count if possible
  * @lockref: pointer to lockref structure