1 files changed, 28 insertions, 94 deletions

diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index 0c0a932c00f3..cc8e952a6772 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -306,6 +306,34 @@ void __hwspin_unlock(struct hwspinlock *hwlock, int mode, unsigned long *flags)
 EXPORT_SYMBOL_GPL(__hwspin_unlock);
 
 /**
+ * hwspin_lock_bust() - bust a specific hwspinlock
+ * @hwlock: a previously-acquired hwspinlock which we want to bust
+ * @id: identifier of the remote lock holder, if applicable
+ *
+ * This function will bust a hwspinlock that was previously acquired as
+ * long as the current owner of the lock matches the id given by the caller.
+ *
+ * Context: Process context.
+ *
+ * Returns: 0 on success, or -EINVAL if the hwspinlock does not exist, or
+ * the bust operation fails, and -EOPNOTSUPP if the bust operation is not
+ * defined for the hwspinlock.
+ */
+int hwspin_lock_bust(struct hwspinlock *hwlock, unsigned int id)
+{
+	if (WARN_ON(!hwlock))
+		return -EINVAL;
+
+	if (!hwlock->bank->ops->bust) {
+		pr_err("bust operation not defined\n");
+		return -EOPNOTSUPP;
+	}
+
+	return hwlock->bank->ops->bust(hwlock, id);
+}
+EXPORT_SYMBOL_GPL(hwspin_lock_bust);
+
+/**
  * of_hwspin_lock_simple_xlate - translate hwlock_spec to return a lock id
  * @hwlock_spec: hwlock specifier as found in the device tree
  *
@@ -682,66 +710,6 @@ static int __hwspin_lock_request(struct hwspinlock *hwlock)
 }
 
 /**
- * hwspin_lock_get_id() - retrieve id number of a given hwspinlock
- * @hwlock: a valid hwspinlock instance
- *
- * Returns: the id number of a given @hwlock, or -EINVAL if @hwlock is invalid.
- */
-int hwspin_lock_get_id(struct hwspinlock *hwlock)
-{
-	if (!hwlock) {
-		pr_err("invalid hwlock\n");
-		return -EINVAL;
-	}
-
-	return hwlock_to_id(hwlock);
-}
-EXPORT_SYMBOL_GPL(hwspin_lock_get_id);
-
-/**
- * hwspin_lock_request() - request an hwspinlock
- *
- * This function should be called by users of the hwspinlock device,
- * in order to dynamically assign them an unused hwspinlock.
- * Usually the user of this lock will then have to communicate the lock's id
- * to the remote core before it can be used for synchronization (to get the
- * id of a given hwlock, use hwspin_lock_get_id()).
- *
- * Should be called from a process context (might sleep)
- *
- * Returns: the address of the assigned hwspinlock, or %NULL on error
- */
-struct hwspinlock *hwspin_lock_request(void)
-{
-	struct hwspinlock *hwlock;
-	int ret;
-
-	mutex_lock(&hwspinlock_tree_lock);
-
-	/* look for an unused lock */
-	ret = radix_tree_gang_lookup_tag(&hwspinlock_tree, (void **)&hwlock,
-						0, 1, HWSPINLOCK_UNUSED);
-	if (ret == 0) {
-		pr_warn("a free hwspinlock is not available\n");
-		hwlock = NULL;
-		goto out;
-	}
-
-	/* sanity check that should never fail */
-	WARN_ON(ret > 1);
-
-	/* mark as used and power up */
-	ret = __hwspin_lock_request(hwlock);
-	if (ret < 0)
-		hwlock = NULL;
-
-out:
-	mutex_unlock(&hwspinlock_tree_lock);
-	return hwlock;
-}
-EXPORT_SYMBOL_GPL(hwspin_lock_request);
-
-/**
  * hwspin_lock_request_specific() - request for a specific hwspinlock
  * @id: index of the specific hwspinlock that is requested
  *
@@ -885,40 +853,6 @@ int devm_hwspin_lock_free(struct device *dev, struct hwspinlock *hwlock)
 EXPORT_SYMBOL_GPL(devm_hwspin_lock_free);
 
 /**
- * devm_hwspin_lock_request() - request an hwspinlock for a managed device
- * @dev: the device to request an hwspinlock
- *
- * This function should be called by users of the hwspinlock device,
- * in order to dynamically assign them an unused hwspinlock.
- * Usually the user of this lock will then have to communicate the lock's id
- * to the remote core before it can be used for synchronization (to get the
- * id of a given hwlock, use hwspin_lock_get_id()).
- *
- * Should be called from a process context (might sleep)
- *
- * Returns: the address of the assigned hwspinlock, or %NULL on error
- */
-struct hwspinlock *devm_hwspin_lock_request(struct device *dev)
-{
-	struct hwspinlock **ptr, *hwlock;
-
-	ptr = devres_alloc(devm_hwspin_lock_release, sizeof(*ptr), GFP_KERNEL);
-	if (!ptr)
-		return NULL;
-
-	hwlock = hwspin_lock_request();
-	if (hwlock) {
-		*ptr = hwlock;
-		devres_add(dev, ptr);
-	} else {
-		devres_free(ptr);
-	}
-
-	return hwlock;
-}
-EXPORT_SYMBOL_GPL(devm_hwspin_lock_request);
-
-/**
  * devm_hwspin_lock_request_specific() - request for a specific hwspinlock for
  *					 a managed device
  * @dev: the device to request the specific hwspinlock