![Lv Zheng](/assets/img/avatar_default.png)
ACPICA commit b2294cae776f5a66a7697414b21949d307e6856f This patch removes unwanted spaces for typedef. This solution doesn't cover function types. Note that the linuxize result of this commit is very giant and should have many conflicts against the current Linux upstream. Thus it is required to modify the linuxize result of this commit and the commits around it manually in order to have them merged to the Linux upstream. Since this is very costy, we should do this only once, and if we can't ensure to do this only once, we need to revert the Linux code to the wrong indentation result before merging the linuxize result of this commit. Lv Zheng. Link: https://github.com/acpica/acpica/commit/b2294cae Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
219 lines
6.7 KiB
C
219 lines
6.7 KiB
C
/*******************************************************************************
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*
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* Module Name: utownerid - Support for Table/Method Owner IDs
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2016, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utownerid")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_allocate_owner_id
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*
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* PARAMETERS: owner_id - Where the new owner ID is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
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* track objects created by the table or method, to be deleted
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* when the method exits or the table is unloaded.
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*
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******************************************************************************/
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acpi_status acpi_ut_allocate_owner_id(acpi_owner_id *owner_id)
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{
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u32 i;
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u32 j;
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u32 k;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ut_allocate_owner_id);
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/* Guard against multiple allocations of ID to the same location */
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if (*owner_id) {
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ACPI_ERROR((AE_INFO,
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"Owner ID [0x%2.2X] already exists", *owner_id));
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return_ACPI_STATUS(AE_ALREADY_EXISTS);
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}
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/* Mutex for the global ID mask */
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status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Find a free owner ID, cycle through all possible IDs on repeated
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* allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index
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* may have to be scanned twice.
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*/
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for (i = 0, j = acpi_gbl_last_owner_id_index;
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i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) {
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if (j >= ACPI_NUM_OWNERID_MASKS) {
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j = 0; /* Wraparound to start of mask array */
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}
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for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) {
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if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) {
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/* There are no free IDs in this mask */
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break;
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}
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if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) {
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/*
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* Found a free ID. The actual ID is the bit index plus one,
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* making zero an invalid Owner ID. Save this as the last ID
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* allocated and update the global ID mask.
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*/
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acpi_gbl_owner_id_mask[j] |= (1 << k);
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acpi_gbl_last_owner_id_index = (u8)j;
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acpi_gbl_next_owner_id_offset = (u8)(k + 1);
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/*
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* Construct encoded ID from the index and bit position
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*
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* Note: Last [j].k (bit 255) is never used and is marked
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* permanently allocated (prevents +1 overflow)
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*/
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*owner_id =
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(acpi_owner_id)((k + 1) + ACPI_MUL_32(j));
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ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
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"Allocated OwnerId: %2.2X\n",
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(unsigned int)*owner_id));
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goto exit;
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}
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}
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acpi_gbl_next_owner_id_offset = 0;
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}
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/*
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* All owner_ids have been allocated. This typically should
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* not happen since the IDs are reused after deallocation. The IDs are
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* allocated upon table load (one per table) and method execution, and
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* they are released when a table is unloaded or a method completes
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* execution.
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*
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* If this error happens, there may be very deep nesting of invoked
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* control methods, or there may be a bug where the IDs are not released.
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*/
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status = AE_OWNER_ID_LIMIT;
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ACPI_ERROR((AE_INFO,
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"Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT"));
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exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_release_owner_id
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*
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* PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_ID
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*
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* RETURN: None. No error is returned because we are either exiting a
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* control method or unloading a table. Either way, we would
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* ignore any error anyway.
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*
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* DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255
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*
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******************************************************************************/
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void acpi_ut_release_owner_id(acpi_owner_id *owner_id_ptr)
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{
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acpi_owner_id owner_id = *owner_id_ptr;
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acpi_status status;
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u32 index;
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u32 bit;
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ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id);
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/* Always clear the input owner_id (zero is an invalid ID) */
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*owner_id_ptr = 0;
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/* Zero is not a valid owner_ID */
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if (owner_id == 0) {
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ACPI_ERROR((AE_INFO, "Invalid OwnerId: 0x%2.2X", owner_id));
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return_VOID;
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}
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/* Mutex for the global ID mask */
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status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
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if (ACPI_FAILURE(status)) {
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return_VOID;
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}
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/* Normalize the ID to zero */
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owner_id--;
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/* Decode ID to index/offset pair */
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index = ACPI_DIV_32(owner_id);
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bit = 1 << ACPI_MOD_32(owner_id);
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/* Free the owner ID only if it is valid */
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if (acpi_gbl_owner_id_mask[index] & bit) {
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acpi_gbl_owner_id_mask[index] ^= bit;
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} else {
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ACPI_ERROR((AE_INFO,
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"Release of non-allocated OwnerId: 0x%2.2X",
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owner_id + 1));
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}
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(void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
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return_VOID;
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}
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