hwspinlock: Remove unused (devm_)hwspin_lock_request()

devm_hwspin_lock_request() was added by 2018's
commit 4f1acd758b08 ("hwspinlock: Add devm_xxx() APIs to request/free
hwlock") however, it's never been used, everyone uses the
devm_hwspin_lock_request_specific() call instead.

Remove it.

Similarly, the none-devm variant isn't used.
Remove it, and the referring documentation.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241027205445.239108-1-linux@treblig.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

1 files changed, 0 insertions, 77 deletions

diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index 6505261e6068..f000432ce21d 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -727,49 +727,6 @@ int hwspin_lock_get_id(struct hwspinlock *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
  *
@@ -913,40 +870,6 @@ 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