Remove unused devm_free_percpu().

By the way, it was never used in the drivers/ from day 1.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 .../driver-api/driver-model/devres.rst        |  1 -
 drivers/base/devres.c                         | 25 -------------------
 include/linux/device.h                        |  1 -
 3 files changed, 27 deletions(-)

diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 2b36ebde9cec..0198ac65e874 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -383,7 +383,6 @@ NET
 
 PER-CPU MEM
   devm_alloc_percpu()
-  devm_free_percpu()
 
 PCI
   devm_pci_alloc_host_bridge()  : managed PCI host bridge allocation
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index c948c88d3956..f54db6d138ab 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -1222,13 +1222,6 @@ static void devm_percpu_release(struct device *dev, void *pdata)
 	free_percpu(p);
 }
 
-static int devm_percpu_match(struct device *dev, void *data, void *p)
-{
-	struct devres *devr = container_of(data, struct devres, data);
-
-	return *(void **)devr->data == p;
-}
-
 /**
  * __devm_alloc_percpu - Resource-managed alloc_percpu
  * @dev: Device to allocate per-cpu memory for
@@ -1264,21 +1257,3 @@ void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
 	return pcpu;
 }
 EXPORT_SYMBOL_GPL(__devm_alloc_percpu);
-
-/**
- * devm_free_percpu - Resource-managed free_percpu
- * @dev: Device this memory belongs to
- * @pdata: Per-cpu memory to free
- *
- * Free memory allocated with devm_alloc_percpu().
- */
-void devm_free_percpu(struct device *dev, void __percpu *pdata)
-{
-	/*
-	 * Use devres_release() to prevent memory leakage as
-	 * devm_free_pages() does.
-	 */
-	WARN_ON(devres_release(dev, devm_percpu_release, devm_percpu_match,
-			       (void *)(__force unsigned long)pdata));
-}
-EXPORT_SYMBOL_GPL(devm_free_percpu);
diff --git a/include/linux/device.h b/include/linux/device.h
index b031ff71a5bd..0c6377f6631c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -298,7 +298,6 @@ void device_remove_bin_file(struct device *dev,
 
 void __percpu *__devm_alloc_percpu(struct device *dev, size_t size,
 				   size_t align);
-void devm_free_percpu(struct device *dev, void __percpu *pdata);
 
 struct device_dma_parameters {
 	/*
-- 
2.50.1