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Commit bb3fec14 authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki
Browse files

ACPICA: Remove unused ACPI_FREE_BUFFER macro. No functional change. 



This macro is no longer used by ACPICA and it is not public.
Also update comments related to the use of ACPI_ALLOCATE_BUFFER and
the use of acpi_os_free (kfree is equivalent and prefered in the
kernel) to free the buffer.

Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 5af2b635

drivers/acpi/acpica/nsxfeval.c

+13 −10
Original line number Diff line number Diff line
@@ -84,7 +84,7 @@ acpi_evaluate_object_typed(acpi_handle handle, 
			   acpi_object_type return_type)

{

	acpi_status status;

	u8 must_free = FALSE;

	u8 free_buffer_on_error = FALSE;



	ACPI_FUNCTION_TRACE(acpi_evaluate_object_typed);
@@ -95,14 +95,13 @@ acpi_evaluate_object_typed(acpi_handle handle, 
	}



	if (return_buffer->length == ACPI_ALLOCATE_BUFFER) {

		must_free = TRUE;

		free_buffer_on_error = TRUE;

	}



	/* Evaluate the object */



	status =

	    acpi_evaluate_object(handle, pathname, external_params,

				 return_buffer);

	status = acpi_evaluate_object(handle, pathname,

				      external_params, return_buffer);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}
@@ -135,11 +134,15 @@ acpi_evaluate_object_typed(acpi_handle handle, 
					   pointer)->type),

		    acpi_ut_get_type_name(return_type)));



	if (must_free) {



		/* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */



		ACPI_FREE_BUFFER(*return_buffer);

	if (free_buffer_on_error) {

		/*

		 * Free a buffer created via ACPI_ALLOCATE_BUFFER.

		 * Note: We use acpi_os_free here because acpi_os_allocate was used

		 * to allocate the buffer. This purposefully bypasses the

		 * (optionally enabled) allocation tracking mechanism since we

		 * only want to track internal allocations.

		 */

		acpi_os_free(return_buffer->pointer);

		return_buffer->pointer = NULL;

	}

drivers/acpi/acpica/utalloc.c

+7 −3
Original line number Diff line number Diff line
@@ -302,9 +302,13 @@ acpi_ut_initialize_buffer(struct acpi_buffer * buffer, 
		return (AE_BUFFER_OVERFLOW);



	case ACPI_ALLOCATE_BUFFER:



		/* Allocate a new buffer */



		/*

		 * Allocate a new buffer. We directectly call acpi_os_allocate here to

		 * purposefully bypass the (optionally enabled) internal allocation

		 * tracking mechanism since we only want to track internal

		 * allocations. Note: The caller should use acpi_os_free to free this

		 * buffer created via ACPI_ALLOCATE_BUFFER.

		 */

		buffer->pointer = acpi_os_allocate(required_length);

		break;

include/acpi/actypes.h

+2 −10
Original line number Diff line number Diff line
@@ -928,22 +928,14 @@ struct acpi_object_list { 
 * Miscellaneous common Data Structures used by the interfaces

 */

#define ACPI_NO_BUFFER              0

#define ACPI_ALLOCATE_BUFFER        (acpi_size) (-1)

#define ACPI_ALLOCATE_LOCAL_BUFFER  (acpi_size) (-2)

#define ACPI_ALLOCATE_BUFFER        (acpi_size) (-1)	/* Let ACPICA allocate buffer */

#define ACPI_ALLOCATE_LOCAL_BUFFER  (acpi_size) (-2)	/* For internal use only (enables tracking) */



struct acpi_buffer {

	acpi_size length;	/* Length in bytes of the buffer */

	void *pointer;		/* pointer to buffer */

};



/*

 * Free a buffer created in an struct acpi_buffer via ACPI_ALLOCATE_BUFFER.

 * Note: We use acpi_os_free here because acpi_os_allocate was used to allocate

 * the buffer. This purposefully bypasses the internal allocation tracking

 * mechanism (if it is enabled).

 */

#define ACPI_FREE_BUFFER(b)         acpi_os_free((b).pointer)



/*

 * name_type for acpi_get_name

 */