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Subject[2.6 patch] drivers/acpi: remove unused exported functions
The patch below completely removes 7 functions that were 
EXPORT_SYMBOL'ed but had exactly zero users in the kernel and makes
another one that was previously EXPORT_SYMBOL'ed static.

It also removes another unused global function to completely remove
drivers/acpi/hardware/hwtimer.c which contained no function used
anywhere in the kernel.

Please comment on whether this patch is correct or whether in-kernel
users of these functions are pending.


diffstat output:
drivers/acpi/acpi_ksyms.c | 8 -
drivers/acpi/events/evxfevnt.c | 191 -----------------------------
drivers/acpi/hardware/Makefile | 2
drivers/acpi/hardware/hwtimer.c | 200 -------------------------------
drivers/acpi/resources/rsxface.c | 52 --------
drivers/acpi/scan.c | 6
drivers/acpi/utilities/utxface.c | 89 -------------
include/acpi/achware.h | 17 --
include/acpi/acpi_bus.h | 1
include/acpi/acpixf.h | 24 ---
10 files changed, 6 insertions(+), 584 deletions(-)


Signed-off-by: Adrian Bunk <bunk@stusta.de>

--- linux-2.6.10-rc1-mm3-full/include/acpi/acpixf.h.old 2004-11-05 21:52:01.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/include/acpi/acpixf.h 2004-11-05 22:21:16.000000000 +0100
@@ -82,10 +82,6 @@
acpi_disable (
void);

-acpi_status
-acpi_get_system_info (
- struct acpi_buffer *ret_buffer);
-
const char *
acpi_format_exception (
acpi_status exception);
@@ -334,10 +330,6 @@
u32 flags);

acpi_status
-acpi_clear_event (
- u32 event);
-
-acpi_status
acpi_get_event_status (
u32 event,
acpi_event_status *event_status);
@@ -373,17 +365,6 @@
u32 flags,
acpi_event_status *event_status);

-acpi_status
-acpi_install_gpe_block (
- acpi_handle gpe_device,
- struct acpi_generic_address *gpe_block_address,
- u32 register_count,
- u32 interrupt_level);
-
-acpi_status
-acpi_remove_gpe_block (
- acpi_handle gpe_device);
-

/*
* Resource interfaces
@@ -401,11 +382,6 @@
struct acpi_buffer *ret_buffer);

acpi_status
-acpi_get_possible_resources(
- acpi_handle device_handle,
- struct acpi_buffer *ret_buffer);
-
-acpi_status
acpi_walk_resources (
acpi_handle device_handle,
char *path,
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/acpi_ksyms.c.old 2004-11-05 21:51:46.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/acpi_ksyms.c 2004-11-05 22:21:08.000000000 +0100
@@ -74,26 +74,19 @@
EXPORT_SYMBOL(acpi_remove_fixed_event_handler);
EXPORT_SYMBOL(acpi_acquire_global_lock);
EXPORT_SYMBOL(acpi_release_global_lock);
-EXPORT_SYMBOL(acpi_install_gpe_block);
-EXPORT_SYMBOL(acpi_remove_gpe_block);
EXPORT_SYMBOL(acpi_get_current_resources);
-EXPORT_SYMBOL(acpi_get_possible_resources);
EXPORT_SYMBOL(acpi_walk_resources);
EXPORT_SYMBOL(acpi_set_current_resources);
EXPORT_SYMBOL(acpi_resource_to_address64);
EXPORT_SYMBOL(acpi_enable_event);
EXPORT_SYMBOL(acpi_disable_event);
-EXPORT_SYMBOL(acpi_clear_event);
EXPORT_SYMBOL(acpi_set_gpe_type);
EXPORT_SYMBOL(acpi_enable_gpe);
-EXPORT_SYMBOL(acpi_get_timer_duration);
-EXPORT_SYMBOL(acpi_get_timer);
EXPORT_SYMBOL(acpi_get_sleep_type_data);
EXPORT_SYMBOL(acpi_get_register);
EXPORT_SYMBOL(acpi_set_register);
EXPORT_SYMBOL(acpi_enter_sleep_state);
EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios);
-EXPORT_SYMBOL(acpi_get_system_info);
EXPORT_SYMBOL(acpi_get_devices);

/* ACPI OS Services Layer (acpi_osl.c) */
@@ -139,7 +132,6 @@
EXPORT_SYMBOL(acpi_bus_register_driver);
EXPORT_SYMBOL(acpi_bus_unregister_driver);
EXPORT_SYMBOL(acpi_bus_scan);
-EXPORT_SYMBOL(acpi_bus_trim);
EXPORT_SYMBOL(acpi_bus_add);

#endif /*CONFIG_ACPI_BUS*/
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/events/evxfevnt.c.old 2004-11-05 21:51:12.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/events/evxfevnt.c 2004-11-05 21:53:37.000000000 +0100
@@ -421,45 +421,6 @@

/*******************************************************************************
*
- * FUNCTION: acpi_clear_event
- *
- * PARAMETERS: Event - The fixed event to be cleared
- *
- * RETURN: Status
- *
- * DESCRIPTION: Clear an ACPI event (fixed)
- *
- ******************************************************************************/
-
-acpi_status
-acpi_clear_event (
- u32 event)
-{
- acpi_status status = AE_OK;
-
-
- ACPI_FUNCTION_TRACE ("acpi_clear_event");
-
-
- /* Decode the Fixed Event */
-
- if (event > ACPI_EVENT_MAX) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /*
- * Clear the requested fixed event (By writing a one to the
- * status register bit)
- */
- status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
- 1, ACPI_MTX_LOCK);
-
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
* FUNCTION: acpi_clear_gpe
*
* PARAMETERS: gpe_device - Parent GPE Device
@@ -614,155 +575,3 @@
return_ACPI_STATUS (status);
}

-
-/*******************************************************************************
- *
- * FUNCTION: acpi_install_gpe_block
- *
- * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
- * gpe_block_address - Address and space_iD
- * register_count - Number of GPE register pairs in the block
- * interrupt_level - H/W interrupt for the block
- *
- * RETURN: Status
- *
- * DESCRIPTION: Create and Install a block of GPE registers
- *
- ******************************************************************************/
-
-acpi_status
-acpi_install_gpe_block (
- acpi_handle gpe_device,
- struct acpi_generic_address *gpe_block_address,
- u32 register_count,
- u32 interrupt_level)
-{
- acpi_status status;
- union acpi_operand_object *obj_desc;
- struct acpi_namespace_node *node;
- struct acpi_gpe_block_info *gpe_block;
-
-
- ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");
-
-
- if ((!gpe_device) ||
- (!gpe_block_address) ||
- (!register_count)) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- node = acpi_ns_map_handle_to_node (gpe_device);
- if (!node) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
-
- /*
- * For user-installed GPE Block Devices, the gpe_block_base_number
- * is always zero
- */
- status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
- 0, interrupt_level, &gpe_block);
- if (ACPI_FAILURE (status)) {
- goto unlock_and_exit;
- }
-
- /* Get the device_object attached to the node */
-
- obj_desc = acpi_ns_get_attached_object (node);
- if (!obj_desc) {
- /* No object, create a new one */
-
- obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
- if (!obj_desc) {
- status = AE_NO_MEMORY;
- goto unlock_and_exit;
- }
-
- status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);
-
- /* Remove local reference to the object */
-
- acpi_ut_remove_reference (obj_desc);
-
- if (ACPI_FAILURE (status)) {
- goto unlock_and_exit;
- }
- }
-
- /* Install the GPE block in the device_object */
-
- obj_desc->device.gpe_block = gpe_block;
-
-
-unlock_and_exit:
- (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_remove_gpe_block
- *
- * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
- *
- * RETURN: Status
- *
- * DESCRIPTION: Remove a previously installed block of GPE registers
- *
- ******************************************************************************/
-
-acpi_status
-acpi_remove_gpe_block (
- acpi_handle gpe_device)
-{
- union acpi_operand_object *obj_desc;
- acpi_status status;
- struct acpi_namespace_node *node;
-
-
- ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");
-
-
- if (!gpe_device) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- node = acpi_ns_map_handle_to_node (gpe_device);
- if (!node) {
- status = AE_BAD_PARAMETER;
- goto unlock_and_exit;
- }
-
- /* Get the device_object attached to the node */
-
- obj_desc = acpi_ns_get_attached_object (node);
- if (!obj_desc ||
- !obj_desc->device.gpe_block) {
- return_ACPI_STATUS (AE_NULL_OBJECT);
- }
-
- /* Delete the GPE block (but not the device_object) */
-
- status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
- if (ACPI_SUCCESS (status)) {
- obj_desc->device.gpe_block = NULL;
- }
-
-unlock_and_exit:
- (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
- return_ACPI_STATUS (status);
-}
-
--- linux-2.6.10-rc1-mm3-full/include/acpi/achware.h.old 2004-11-05 21:54:59.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/include/acpi/achware.h 2004-11-05 21:55:37.000000000 +0100
@@ -159,21 +159,4 @@
struct acpi_gpe_block_info *gpe_block);


-/* ACPI Timer prototypes */
-
-acpi_status
-acpi_get_timer_resolution (
- u32 *resolution);
-
-acpi_status
-acpi_get_timer (
- u32 *ticks);
-
-acpi_status
-acpi_get_timer_duration (
- u32 start_ticks,
- u32 end_ticks,
- u32 *time_elapsed);
-
-
#endif /* __ACHWARE_H__ */
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/hardware/Makefile.old 2004-11-05 21:56:35.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/hardware/Makefile 2004-11-05 21:56:51.000000000 +0100
@@ -2,6 +2,6 @@
# Makefile for all Linux ACPI interpreter subdirectories
#

-obj-y := hwacpi.o hwgpe.o hwregs.o hwsleep.o hwtimer.o
+obj-y := hwacpi.o hwgpe.o hwregs.o hwsleep.o

EXTRA_CFLAGS += $(ACPI_CFLAGS)
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/resources/rsxface.c.old 2004-11-05 21:58:06.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/resources/rsxface.c 2004-11-05 21:58:21.000000000 +0100
@@ -160,58 +160,6 @@

/*******************************************************************************
*
- * FUNCTION: acpi_get_possible_resources
- *
- * PARAMETERS: device_handle - a handle to the device object for the
- * device we are querying
- * ret_buffer - a pointer to a buffer to receive the
- * resources for the device
- *
- * RETURN: Status
- *
- * DESCRIPTION: This function is called to get a list of the possible resources
- * for a specific device. The caller must first acquire a handle
- * for the desired device. The resource data is placed in the
- * buffer pointed to by the ret_buffer variable.
- *
- * If the function fails an appropriate status will be returned
- * and the value of ret_buffer is undefined.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_get_possible_resources (
- acpi_handle device_handle,
- struct acpi_buffer *ret_buffer)
-{
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE ("acpi_get_possible_resources");
-
-
- /*
- * Must have a valid handle and buffer, So we have to have a handle
- * and a return buffer structure, and if there is a non-zero buffer length
- * we also need a valid pointer in the buffer. If it's a zero buffer length,
- * we'll be returning the needed buffer size, so keep going.
- */
- if (!device_handle) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- status = acpi_ut_validate_buffer (ret_buffer);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
-
- status = acpi_rs_get_prs_method_data (device_handle, ret_buffer);
- return_ACPI_STATUS (status);
-}
-
-
-/*******************************************************************************
- *
* FUNCTION: acpi_walk_resources
*
* PARAMETERS: device_handle - a handle to the device object for the
--- linux-2.6.10-rc1-mm3-full/include/acpi/acpi_bus.h.old 2004-11-05 22:00:14.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/include/acpi/acpi_bus.h 2004-11-05 22:00:21.000000000 +0100
@@ -328,7 +328,6 @@
int acpi_bus_register_driver (struct acpi_driver *driver);
int acpi_bus_unregister_driver (struct acpi_driver *driver);
int acpi_bus_scan (struct acpi_device *start);
-int acpi_bus_trim(struct acpi_device *start, int rmdevice);
int acpi_bus_add (struct acpi_device **child, struct acpi_device *parent,
acpi_handle handle, int type);

--- linux-2.6.10-rc1-mm3-full/drivers/acpi/scan.c.old 2004-11-05 21:58:55.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/scan.c 2004-11-05 21:59:48.000000000 +0100
@@ -44,6 +44,10 @@
typedef void acpi_device_sysfs_files(struct kobject *,
const struct attribute *);

+static int
+acpi_bus_trim(struct acpi_device *start,
+ int rmdevice);
+
static void setup_sys_fs_device_files(struct acpi_device *dev,
acpi_device_sysfs_files *func);

@@ -1213,7 +1217,7 @@
}


-int
+static int
acpi_bus_trim(struct acpi_device *start,
int rmdevice)
{
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/utilities/utxface.c.old 2004-11-05 22:20:40.000000000 +0100
+++ linux-2.6.10-rc1-mm3-full/drivers/acpi/utilities/utxface.c 2004-11-05 22:21:00.000000000 +0100
@@ -368,95 +368,6 @@
}


-/******************************************************************************
- *
- * FUNCTION: acpi_get_system_info
- *
- * PARAMETERS: out_buffer - a pointer to a buffer to receive the
- * resources for the device
- * buffer_length - the number of bytes available in the buffer
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: This function is called to get information about the current
- * state of the ACPI subsystem. It will return system information
- * in the out_buffer.
- *
- * If the function fails an appropriate status will be returned
- * and the value of out_buffer is undefined.
- *
- ******************************************************************************/
-
-acpi_status
-acpi_get_system_info (
- struct acpi_buffer *out_buffer)
-{
- struct acpi_system_info *info_ptr;
- u32 i;
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE ("acpi_get_system_info");
-
-
- /* Parameter validation */
-
- status = acpi_ut_validate_buffer (out_buffer);
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
-
- /* Validate/Allocate/Clear caller buffer */
-
- status = acpi_ut_initialize_buffer (out_buffer, sizeof (struct acpi_system_info));
- if (ACPI_FAILURE (status)) {
- return_ACPI_STATUS (status);
- }
-
- /*
- * Populate the return buffer
- */
- info_ptr = (struct acpi_system_info *) out_buffer->pointer;
-
- info_ptr->acpi_ca_version = ACPI_CA_VERSION;
-
- /* System flags (ACPI capabilities) */
-
- info_ptr->flags = ACPI_SYS_MODE_ACPI;
-
- /* Timer resolution - 24 or 32 bits */
-
- if (!acpi_gbl_FADT) {
- info_ptr->timer_resolution = 0;
- }
- else if (acpi_gbl_FADT->tmr_val_ext == 0) {
- info_ptr->timer_resolution = 24;
- }
- else {
- info_ptr->timer_resolution = 32;
- }
-
- /* Clear the reserved fields */
-
- info_ptr->reserved1 = 0;
- info_ptr->reserved2 = 0;
-
- /* Current debug levels */
-
- info_ptr->debug_layer = acpi_dbg_layer;
- info_ptr->debug_level = acpi_dbg_level;
-
- /* Current status of the ACPI tables, per table type */
-
- info_ptr->num_table_types = NUM_ACPI_TABLE_TYPES;
- for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
- info_ptr->table_info[i].count = acpi_gbl_table_lists[i].count;
- }
-
- return_ACPI_STATUS (AE_OK);
-}
-
-
/*****************************************************************************
*
* FUNCTION: acpi_install_initialization_handler
--- linux-2.6.10-rc1-mm3-full/drivers/acpi/hardware/hwtimer.c 2004-11-05 21:56:16.000000000 +0100
+++ /dev/null 2004-08-23 02:01:39.000000000 +0200
@@ -1,200 +0,0 @@
-
-/******************************************************************************
- *
- * Name: hwtimer.c - ACPI Power Management Timer Interface
- *
- *****************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2004, R. Byron Moore
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
-#include <acpi/acpi.h>
-
-#define _COMPONENT ACPI_HARDWARE
- ACPI_MODULE_NAME ("hwtimer")
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_get_timer_resolution
- *
- * PARAMETERS: Resolution - Where the resolution is returned
- *
- * RETURN: Status and timer resolution
- *
- * DESCRIPTION: Obtains resolution of the ACPI PM Timer (24 or 32 bits).
- *
- ******************************************************************************/
-
-acpi_status
-acpi_get_timer_resolution (
- u32 *resolution)
-{
- ACPI_FUNCTION_TRACE ("acpi_get_timer_resolution");
-
-
- if (!resolution) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- if (0 == acpi_gbl_FADT->tmr_val_ext) {
- *resolution = 24;
- }
- else {
- *resolution = 32;
- }
-
- return_ACPI_STATUS (AE_OK);
-}
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_get_timer
- *
- * PARAMETERS: Ticks - Where the timer value is returned
- *
- * RETURN: Status and current ticks
- *
- * DESCRIPTION: Obtains current value of ACPI PM Timer (in ticks).
- *
- ******************************************************************************/
-
-acpi_status
-acpi_get_timer (
- u32 *ticks)
-{
- acpi_status status;
-
-
- ACPI_FUNCTION_TRACE ("acpi_get_timer");
-
-
- if (!ticks) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- status = acpi_hw_low_level_read (32, ticks, &acpi_gbl_FADT->xpm_tmr_blk);
-
- return_ACPI_STATUS (status);
-}
-
-
-/******************************************************************************
- *
- * FUNCTION: acpi_get_timer_duration
- *
- * PARAMETERS: start_ticks - Starting timestamp
- * end_ticks - End timestamp
- * time_elapsed - Where the elapsed time is returned
- *
- * RETURN: Status and time_elapsed
- *
- * DESCRIPTION: Computes the time elapsed (in microseconds) between two
- * PM Timer time stamps, taking into account the possibility of
- * rollovers, the timer resolution, and timer frequency.
- *
- * The PM Timer's clock ticks at roughly 3.6 times per
- * _microsecond_, and its clock continues through Cx state
- * transitions (unlike many CPU timestamp counters) -- making it
- * a versatile and accurate timer.
- *
- * Note that this function accommodates only a single timer
- * rollover. Thus for 24-bit timers, this function should only
- * be used for calculating durations less than ~4.6 seconds
- * (~20 minutes for 32-bit timers) -- calculations below:
- *
- * 2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec
- * 2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes
- *
- ******************************************************************************/
-
-acpi_status
-acpi_get_timer_duration (
- u32 start_ticks,
- u32 end_ticks,
- u32 *time_elapsed)
-{
- acpi_status status;
- u32 delta_ticks;
- acpi_integer quotient;
-
-
- ACPI_FUNCTION_TRACE ("acpi_get_timer_duration");
-
-
- if (!time_elapsed) {
- return_ACPI_STATUS (AE_BAD_PARAMETER);
- }
-
- /*
- * Compute Tick Delta:
- * Handle (max one) timer rollovers on 24-bit versus 32-bit timers.
- */
- if (start_ticks < end_ticks) {
- delta_ticks = end_ticks - start_ticks;
- }
- else if (start_ticks > end_ticks) {
- if (0 == acpi_gbl_FADT->tmr_val_ext) {
- /* 24-bit Timer */
-
- delta_ticks = (((0x00FFFFFF - start_ticks) + end_ticks) & 0x00FFFFFF);
- }
- else {
- /* 32-bit Timer */
-
- delta_ticks = (0xFFFFFFFF - start_ticks) + end_ticks;
- }
- }
- else /* start_ticks == end_ticks */ {
- *time_elapsed = 0;
- return_ACPI_STATUS (AE_OK);
- }
-
- /*
- * Compute Duration (Requires a 64-bit multiply and divide):
- *
- * time_elapsed = (delta_ticks * 1000000) / PM_TIMER_FREQUENCY;
- */
- status = acpi_ut_short_divide (((u64) delta_ticks) * 1000000,
- PM_TIMER_FREQUENCY, &quotient, NULL);
-
- *time_elapsed = (u32) quotient;
- return_ACPI_STATUS (status);
-}
-
-
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