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ACPI: OSL: Remove the helper for deactivating memory region

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There are no more users for acpi_release_memory().

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Heikki Krogerus 2022-04-25 14:45:44 +03:00 committed by Rafael J. Wysocki
parent cdc3d2abf4
commit b941820ec9
2 changed files with 0 additions and 89 deletions
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86
drivers/acpi/osl.c
View File

@ -36,7 +36,6 @@
#include <linux/io-64-nonatomic-lo-hi.h>
#include "acpica/accommon.h"
#include "acpica/acnamesp.h"
#include "internal.h"
/* Definitions for ACPI_DEBUG_PRINT() */
@ -1496,91 +1495,6 @@ int acpi_check_region(resource_size_t start, resource_size_t n,
}
EXPORT_SYMBOL(acpi_check_region);
static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
void *_res, void **return_value)
{
struct acpi_mem_space_context **mem_ctx;
union acpi_operand_object *handler_obj;
union acpi_operand_object *region_obj2;
union acpi_operand_object *region_obj;
struct resource *res = _res;
acpi_status status;
region_obj = acpi_ns_get_attached_object(handle);
if (!region_obj)
return AE_OK;
handler_obj = region_obj->region.handler;
if (!handler_obj)
return AE_OK;
if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
return AE_OK;
if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE))
return AE_OK;
region_obj2 = acpi_ns_get_secondary_object(region_obj);
if (!region_obj2)
return AE_OK;
mem_ctx = (void *)&region_obj2->extra.region_context;
if (!(mem_ctx[0]->address >= res->start &&
mem_ctx[0]->address < res->end))
return AE_OK;
status = handler_obj->address_space.setup(region_obj,
ACPI_REGION_DEACTIVATE,
NULL, (void **)mem_ctx);
if (ACPI_SUCCESS(status))
region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
return status;
}
/**
* acpi_release_memory - Release any mappings done to a memory region
* @handle: Handle to namespace node
* @res: Memory resource
* @level: A level that terminates the search
*
* Walks through @handle and unmaps all SystemMemory Operation Regions that
* overlap with @res and that have already been activated (mapped).
*
* This is a helper that allows drivers to place special requirements on memory
* region that may overlap with operation regions, primarily allowing them to
* safely map the region as non-cached memory.
*
* The unmapped Operation Regions will be automatically remapped next time they
* are called, so the drivers do not need to do anything else.
*/
acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
u32 level)
{
acpi_status status;
if (!(res->flags & IORESOURCE_MEM))
return AE_TYPE;
status = acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
acpi_deactivate_mem_region, NULL,
res, NULL);
if (ACPI_FAILURE(status))
return status;
/*
* Wait for all of the mappings queued up for removal by
* acpi_deactivate_mem_region() to actually go away.
*/
synchronize_rcu();
rcu_barrier();
flush_scheduled_work();
return AE_OK;
}
EXPORT_SYMBOL_GPL(acpi_release_memory);
/*
* Let drivers know whether the resource checks are effective
*/

3
include/linux/acpi.h
View File

@ -520,9 +520,6 @@ int acpi_check_resource_conflict(const struct resource *res);
int acpi_check_region(resource_size_t start, resource_size_t n,
const char *name);
acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
u32 level);
int acpi_resources_are_enforced(void);
#ifdef CONFIG_HIBERNATION