drivers/acpi/utilities/utalloc.c

   1 /******************************************************************************
   2  *
   3  * Module Name: utalloc - local memory allocation routines
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45
  46 #define _COMPONENT          ACPI_UTILITIES
  47 ACPI_MODULE_NAME("utalloc")
  48
  49 /* Local prototypes */
  50 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  51 static struct acpi_debug_mem_block *acpi_ut_find_allocation(void *allocation);
  52
  53 static acpi_status
  54 acpi_ut_track_allocation(struct acpi_debug_mem_block *address,
  55                          acpi_size size,
  56                          u8 alloc_type, u32 component, char *module, u32 line);
  57
  58 static acpi_status
  59 acpi_ut_remove_allocation(struct acpi_debug_mem_block *address,
  60                           u32 component, char *module, u32 line);
  61
  62 static acpi_status
  63 acpi_ut_create_list(char *list_name,
  64                     u16 object_size, struct acpi_memory_list **return_cache);
  65 #endif
  66
  67 /*******************************************************************************
  68  *
  69  * FUNCTION:    acpi_ut_create_caches
  70  *
  71  * PARAMETERS:  None
  72  *
  73  * RETURN:      Status
  74  *
  75  * DESCRIPTION: Create all local caches
  76  *
  77  ******************************************************************************/
  78
  79 acpi_status acpi_ut_create_caches(void)
  80 {
  81         acpi_status status;
  82
  83 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
  84
  85         /* Memory allocation lists */
  86
  87         status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
  88         if (ACPI_FAILURE(status)) {
  89                 return (status);
  90         }
  91
  92         status =
  93             acpi_ut_create_list("Acpi-Namespace",
  94                                 sizeof(struct acpi_namespace_node),
  95                                 &acpi_gbl_ns_node_list);
  96         if (ACPI_FAILURE(status)) {
  97                 return (status);
  98         }
  99 #endif
 100
 101         /* Object Caches, for frequently used objects */
 102
 103         status =
 104             acpi_os_create_cache("acpi_state", sizeof(union acpi_generic_state),
 105                                  ACPI_MAX_STATE_CACHE_DEPTH,
 106                                  &acpi_gbl_state_cache);
 107         if (ACPI_FAILURE(status)) {
 108                 return (status);
 109         }
 110
 111         status =
 112             acpi_os_create_cache("acpi_parse",
 113                                  sizeof(struct acpi_parse_obj_common),
 114                                  ACPI_MAX_PARSE_CACHE_DEPTH,
 115                                  &acpi_gbl_ps_node_cache);
 116         if (ACPI_FAILURE(status)) {
 117                 return (status);
 118         }
 119
 120         status =
 121             acpi_os_create_cache("acpi_parse_ext",
 122                                  sizeof(struct acpi_parse_obj_named),
 123                                  ACPI_MAX_EXTPARSE_CACHE_DEPTH,
 124                                  &acpi_gbl_ps_node_ext_cache);
 125         if (ACPI_FAILURE(status)) {
 126                 return (status);
 127         }
 128
 129         status =
 130             acpi_os_create_cache("acpi_operand",
 131                                  sizeof(union acpi_operand_object),
 132                                  ACPI_MAX_OBJECT_CACHE_DEPTH,
 133                                  &acpi_gbl_operand_cache);
 134         if (ACPI_FAILURE(status)) {
 135                 return (status);
 136         }
 137
 138         return (AE_OK);
 139 }
 140
 141 /*******************************************************************************
 142  *
 143  * FUNCTION:    acpi_ut_delete_caches
 144  *
 145  * PARAMETERS:  None
 146  *
 147  * RETURN:      Status
 148  *
 149  * DESCRIPTION: Purge and delete all local caches
 150  *
 151  ******************************************************************************/
 152
 153 acpi_status acpi_ut_delete_caches(void)
 154 {
 155
 156         (void)acpi_os_delete_cache(acpi_gbl_state_cache);
 157         acpi_gbl_state_cache = NULL;
 158
 159         (void)acpi_os_delete_cache(acpi_gbl_operand_cache);
 160         acpi_gbl_operand_cache = NULL;
 161
 162         (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
 163         acpi_gbl_ps_node_cache = NULL;
 164
 165         (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
 166         acpi_gbl_ps_node_ext_cache = NULL;
 167
 168         return (AE_OK);
 169 }
 170
 171 /*******************************************************************************
 172  *
 173  * FUNCTION:    acpi_ut_validate_buffer
 174  *
 175  * PARAMETERS:  Buffer              - Buffer descriptor to be validated
 176  *
 177  * RETURN:      Status
 178  *
 179  * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
 180  *
 181  ******************************************************************************/
 182
 183 acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer)
 184 {
 185
 186         /* Obviously, the structure pointer must be valid */
 187
 188         if (!buffer) {
 189                 return (AE_BAD_PARAMETER);
 190         }
 191
 192         /* Special semantics for the length */
 193
 194         if ((buffer->length == ACPI_NO_BUFFER) ||
 195             (buffer->length == ACPI_ALLOCATE_BUFFER) ||
 196             (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
 197                 return (AE_OK);
 198         }
 199
 200         /* Length is valid, the buffer pointer must be also */
 201
 202         if (!buffer->pointer) {
 203                 return (AE_BAD_PARAMETER);
 204         }
 205
 206         return (AE_OK);
 207 }
 208
 209 /*******************************************************************************
 210  *
 211  * FUNCTION:    acpi_ut_initialize_buffer
 212  *
 213  * PARAMETERS:  Buffer              - Buffer to be validated
 214  *              required_length     - Length needed
 215  *
 216  * RETURN:      Status
 217  *
 218  * DESCRIPTION: Validate that the buffer is of the required length or
 219  *              allocate a new buffer.  Returned buffer is always zeroed.
 220  *
 221  ******************************************************************************/
 222
 223 acpi_status
 224 acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
 225                           acpi_size required_length)
 226 {
 227         acpi_status status = AE_OK;
 228
 229         switch (buffer->length) {
 230         case ACPI_NO_BUFFER:
 231
 232                 /* Set the exception and returned the required length */
 233
 234                 status = AE_BUFFER_OVERFLOW;
 235                 break;
 236
 237         case ACPI_ALLOCATE_BUFFER:
 238
 239                 /* Allocate a new buffer */
 240
 241                 buffer->pointer = acpi_os_allocate(required_length);
 242                 if (!buffer->pointer) {
 243                         return (AE_NO_MEMORY);
 244                 }
 245
 246                 /* Clear the buffer */
 247
 248                 ACPI_MEMSET(buffer->pointer, 0, required_length);
 249                 break;
 250
 251         case ACPI_ALLOCATE_LOCAL_BUFFER:
 252
 253                 /* Allocate a new buffer with local interface to allow tracking */
 254
 255                 buffer->pointer = ACPI_MEM_CALLOCATE(required_length);
 256                 if (!buffer->pointer) {
 257                         return (AE_NO_MEMORY);
 258                 }
 259                 break;
 260
 261         default:
 262
 263                 /* Existing buffer: Validate the size of the buffer */
 264
 265                 if (buffer->length < required_length) {
 266                         status = AE_BUFFER_OVERFLOW;
 267                         break;
 268                 }
 269
 270                 /* Clear the buffer */
 271
 272                 ACPI_MEMSET(buffer->pointer, 0, required_length);
 273                 break;
 274         }
 275
 276         buffer->length = required_length;
 277         return (status);
 278 }
 279
 280 /*******************************************************************************
 281  *
 282  * FUNCTION:    acpi_ut_allocate
 283  *
 284  * PARAMETERS:  Size                - Size of the allocation
 285  *              Component           - Component type of caller
 286  *              Module              - Source file name of caller
 287  *              Line                - Line number of caller
 288  *
 289  * RETURN:      Address of the allocated memory on success, NULL on failure.
 290  *
 291  * DESCRIPTION: The subsystem's equivalent of malloc.
 292  *
 293  ******************************************************************************/
 294
 295 void *acpi_ut_allocate(acpi_size size, u32 component, char *module, u32 line)
 296 {
 297         void *allocation;
 298
 299         ACPI_FUNCTION_TRACE_U32("ut_allocate", size);
 300
 301         /* Check for an inadvertent size of zero bytes */
 302
 303         if (!size) {
 304                 ACPI_ERROR((module, line,
 305                             "ut_allocate: Attempt to allocate zero bytes, allocating 1 byte"));
 306                 size = 1;
 307         }
 308
 309         allocation = acpi_os_allocate(size);
 310         if (!allocation) {
 311                 /* Report allocation error */
 312
 313                 ACPI_ERROR((module, line,
 314                             "ut_allocate: Could not allocate size %X",
 315                             (u32) size));
 316
 317                 return_PTR(NULL);
 318         }
 319
 320         return_PTR(allocation);
 321 }
 322
 323 /*******************************************************************************
 324  *
 325  * FUNCTION:    acpi_ut_callocate
 326  *
 327  * PARAMETERS:  Size                - Size of the allocation
 328  *              Component           - Component type of caller
 329  *              Module              - Source file name of caller
 330  *              Line                - Line number of caller
 331  *
 332  * RETURN:      Address of the allocated memory on success, NULL on failure.
 333  *
 334  * DESCRIPTION: Subsystem equivalent of calloc.
 335  *
 336  ******************************************************************************/
 337
 338 void *acpi_ut_callocate(acpi_size size, u32 component, char *module, u32 line)
 339 {
 340         void *allocation;
 341
 342         ACPI_FUNCTION_TRACE_U32("ut_callocate", size);
 343
 344         /* Check for an inadvertent size of zero bytes */
 345
 346         if (!size) {
 347                 ACPI_ERROR((module, line,
 348                             "Attempt to allocate zero bytes, allocating 1 byte"));
 349                 size = 1;
 350         }
 351
 352         allocation = acpi_os_allocate(size);
 353         if (!allocation) {
 354                 /* Report allocation error */
 355
 356                 ACPI_ERROR((module, line,
 357                             "Could not allocate size %X", (u32) size));
 358                 return_PTR(NULL);
 359         }
 360
 361         /* Clear the memory block */
 362
 363         ACPI_MEMSET(allocation, 0, size);
 364         return_PTR(allocation);
 365 }
 366
 367 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 368 /*
 369  * These procedures are used for tracking memory leaks in the subsystem, and
 370  * they get compiled out when the ACPI_DBG_TRACK_ALLOCATIONS is not set.
 371  *
 372  * Each memory allocation is tracked via a doubly linked list.  Each
 373  * element contains the caller's component, module name, function name, and
 374  * line number.  acpi_ut_allocate and acpi_ut_callocate call
 375  * acpi_ut_track_allocation to add an element to the list; deletion
 376  * occurs in the body of acpi_ut_free.
 377  */
 378
 379 /*******************************************************************************
 380  *
 381  * FUNCTION:    acpi_ut_create_list
 382  *
 383  * PARAMETERS:  cache_name      - Ascii name for the cache
 384  *              object_size     - Size of each cached object
 385  *              return_cache    - Where the new cache object is returned
 386  *
 387  * RETURN:      Status
 388  *
 389  * DESCRIPTION: Create a local memory list for tracking purposed
 390  *
 391  ******************************************************************************/
 392
 393 static acpi_status
 394 acpi_ut_create_list(char *list_name,
 395                     u16 object_size, struct acpi_memory_list **return_cache)
 396 {
 397         struct acpi_memory_list *cache;
 398
 399         cache = acpi_os_allocate(sizeof(struct acpi_memory_list));
 400         if (!cache) {
 401                 return (AE_NO_MEMORY);
 402         }
 403
 404         ACPI_MEMSET(cache, 0, sizeof(struct acpi_memory_list));
 405
 406         cache->list_name = list_name;
 407         cache->object_size = object_size;
 408
 409         *return_cache = cache;
 410         return (AE_OK);
 411 }
 412
 413 /*******************************************************************************
 414  *
 415  * FUNCTION:    acpi_ut_allocate_and_track
 416  *
 417  * PARAMETERS:  Size                - Size of the allocation
 418  *              Component           - Component type of caller
 419  *              Module              - Source file name of caller
 420  *              Line                - Line number of caller
 421  *
 422  * RETURN:      Address of the allocated memory on success, NULL on failure.
 423  *
 424  * DESCRIPTION: The subsystem's equivalent of malloc.
 425  *
 426  ******************************************************************************/
 427
 428 void *acpi_ut_allocate_and_track(acpi_size size,
 429                                  u32 component, char *module, u32 line)
 430 {
 431         struct acpi_debug_mem_block *allocation;
 432         acpi_status status;
 433
 434         allocation =
 435             acpi_ut_allocate(size + sizeof(struct acpi_debug_mem_header),
 436                              component, module, line);
 437         if (!allocation) {
 438                 return (NULL);
 439         }
 440
 441         status = acpi_ut_track_allocation(allocation, size,
 442                                           ACPI_MEM_MALLOC, component, module,
 443                                           line);
 444         if (ACPI_FAILURE(status)) {
 445                 acpi_os_free(allocation);
 446                 return (NULL);
 447         }
 448
 449         acpi_gbl_global_list->total_allocated++;
 450         acpi_gbl_global_list->current_total_size += (u32) size;
 451
 452         return ((void *)&allocation->user_space);
 453 }
 454
 455 /*******************************************************************************
 456  *
 457  * FUNCTION:    acpi_ut_callocate_and_track
 458  *
 459  * PARAMETERS:  Size                - Size of the allocation
 460  *              Component           - Component type of caller
 461  *              Module              - Source file name of caller
 462  *              Line                - Line number of caller
 463  *
 464  * RETURN:      Address of the allocated memory on success, NULL on failure.
 465  *
 466  * DESCRIPTION: Subsystem equivalent of calloc.
 467  *
 468  ******************************************************************************/
 469
 470 void *acpi_ut_callocate_and_track(acpi_size size,
 471                                   u32 component, char *module, u32 line)
 472 {
 473         struct acpi_debug_mem_block *allocation;
 474         acpi_status status;
 475
 476         allocation =
 477             acpi_ut_callocate(size + sizeof(struct acpi_debug_mem_header),
 478                               component, module, line);
 479         if (!allocation) {
 480                 /* Report allocation error */
 481
 482                 ACPI_ERROR((module, line,
 483                             "Could not allocate size %X", (u32) size));
 484                 return (NULL);
 485         }
 486
 487         status = acpi_ut_track_allocation(allocation, size,
 488                                           ACPI_MEM_CALLOC, component, module,
 489                                           line);
 490         if (ACPI_FAILURE(status)) {
 491                 acpi_os_free(allocation);
 492                 return (NULL);
 493         }
 494
 495         acpi_gbl_global_list->total_allocated++;
 496         acpi_gbl_global_list->current_total_size += (u32) size;
 497
 498         return ((void *)&allocation->user_space);
 499 }
 500
 501 /*******************************************************************************
 502  *
 503  * FUNCTION:    acpi_ut_free_and_track
 504  *
 505  * PARAMETERS:  Allocation          - Address of the memory to deallocate
 506  *              Component           - Component type of caller
 507  *              Module              - Source file name of caller
 508  *              Line                - Line number of caller
 509  *
 510  * RETURN:      None
 511  *
 512  * DESCRIPTION: Frees the memory at Allocation
 513  *
 514  ******************************************************************************/
 515
 516 void
 517 acpi_ut_free_and_track(void *allocation, u32 component, char *module, u32 line)
 518 {
 519         struct acpi_debug_mem_block *debug_block;
 520         acpi_status status;
 521
 522         ACPI_FUNCTION_TRACE_PTR("ut_free", allocation);
 523
 524         if (NULL == allocation) {
 525                 ACPI_ERROR((module, line, "Attempt to delete a NULL address"));
 526
 527                 return_VOID;
 528         }
 529
 530         debug_block = ACPI_CAST_PTR(struct acpi_debug_mem_block,
 531                                     (((char *)allocation) -
 532                                      sizeof(struct acpi_debug_mem_header)));
 533
 534         acpi_gbl_global_list->total_freed++;
 535         acpi_gbl_global_list->current_total_size -= debug_block->size;
 536
 537         status = acpi_ut_remove_allocation(debug_block,
 538                                            component, module, line);
 539         if (ACPI_FAILURE(status)) {
 540                 ACPI_EXCEPTION((AE_INFO, status, "Could not free memory"));
 541         }
 542
 543         acpi_os_free(debug_block);
 544         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p freed\n", allocation));
 545         return_VOID;
 546 }
 547
 548 /*******************************************************************************
 549  *
 550  * FUNCTION:    acpi_ut_find_allocation
 551  *
 552  * PARAMETERS:  Allocation              - Address of allocated memory
 553  *
 554  * RETURN:      A list element if found; NULL otherwise.
 555  *
 556  * DESCRIPTION: Searches for an element in the global allocation tracking list.
 557  *
 558  ******************************************************************************/
 559
 560 static struct acpi_debug_mem_block *acpi_ut_find_allocation(void *allocation)
 561 {
 562         struct acpi_debug_mem_block *element;
 563
 564         ACPI_FUNCTION_ENTRY();
 565
 566         element = acpi_gbl_global_list->list_head;
 567
 568         /* Search for the address. */
 569
 570         while (element) {
 571                 if (element == allocation) {
 572                         return (element);
 573                 }
 574
 575                 element = element->next;
 576         }
 577
 578         return (NULL);
 579 }
 580
 581 /*******************************************************************************
 582  *
 583  * FUNCTION:    acpi_ut_track_allocation
 584  *
 585  * PARAMETERS:  Allocation          - Address of allocated memory
 586  *              Size                - Size of the allocation
 587  *              alloc_type          - MEM_MALLOC or MEM_CALLOC
 588  *              Component           - Component type of caller
 589  *              Module              - Source file name of caller
 590  *              Line                - Line number of caller
 591  *
 592  * RETURN:      None.
 593  *
 594  * DESCRIPTION: Inserts an element into the global allocation tracking list.
 595  *
 596  ******************************************************************************/
 597
 598 static acpi_status
 599 acpi_ut_track_allocation(struct acpi_debug_mem_block *allocation,
 600                          acpi_size size,
 601                          u8 alloc_type, u32 component, char *module, u32 line)
 602 {
 603         struct acpi_memory_list *mem_list;
 604         struct acpi_debug_mem_block *element;
 605         acpi_status status = AE_OK;
 606
 607         ACPI_FUNCTION_TRACE_PTR("ut_track_allocation", allocation);
 608
 609         mem_list = acpi_gbl_global_list;
 610         status = acpi_ut_acquire_mutex(ACPI_MTX_MEMORY);
 611         if (ACPI_FAILURE(status)) {
 612                 return_ACPI_STATUS(status);
 613         }
 614
 615         /*
 616          * Search list for this address to make sure it is not already on the list.
 617          * This will catch several kinds of problems.
 618          */
 619         element = acpi_ut_find_allocation(allocation);
 620         if (element) {
 621                 ACPI_ERROR((AE_INFO,
 622                             "ut_track_allocation: Allocation already present in list! (%p)",
 623                             allocation));
 624
 625                 ACPI_ERROR((AE_INFO, "Element %p Address %p",
 626                             element, allocation));
 627
 628                 goto unlock_and_exit;
 629         }
 630
 631         /* Fill in the instance data. */
 632
 633         allocation->size = (u32) size;
 634         allocation->alloc_type = alloc_type;
 635         allocation->component = component;
 636         allocation->line = line;
 637
 638         ACPI_STRNCPY(allocation->module, module, ACPI_MAX_MODULE_NAME);
 639         allocation->module[ACPI_MAX_MODULE_NAME - 1] = 0;
 640
 641         /* Insert at list head */
 642
 643         if (mem_list->list_head) {
 644                 ((struct acpi_debug_mem_block *)(mem_list->list_head))->
 645                     previous = allocation;
 646         }
 647
 648         allocation->next = mem_list->list_head;
 649         allocation->previous = NULL;
 650
 651         mem_list->list_head = allocation;
 652
 653       unlock_and_exit:
 654         status = acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 655         return_ACPI_STATUS(status);
 656 }
 657
 658 /*******************************************************************************
 659  *
 660  * FUNCTION:    acpi_ut_remove_allocation
 661  *
 662  * PARAMETERS:  Allocation          - Address of allocated memory
 663  *              Component           - Component type of caller
 664  *              Module              - Source file name of caller
 665  *              Line                - Line number of caller
 666  *
 667  * RETURN:
 668  *
 669  * DESCRIPTION: Deletes an element from the global allocation tracking list.
 670  *
 671  ******************************************************************************/
 672
 673 static acpi_status
 674 acpi_ut_remove_allocation(struct acpi_debug_mem_block *allocation,
 675                           u32 component, char *module, u32 line)
 676 {
 677         struct acpi_memory_list *mem_list;
 678         acpi_status status;
 679
 680         ACPI_FUNCTION_TRACE("ut_remove_allocation");
 681
 682         mem_list = acpi_gbl_global_list;
 683         if (NULL == mem_list->list_head) {
 684                 /* No allocations! */
 685
 686                 ACPI_ERROR((module, line,
 687                             "Empty allocation list, nothing to free!"));
 688
 689                 return_ACPI_STATUS(AE_OK);
 690         }
 691
 692         status = acpi_ut_acquire_mutex(ACPI_MTX_MEMORY);
 693         if (ACPI_FAILURE(status)) {
 694                 return_ACPI_STATUS(status);
 695         }
 696
 697         /* Unlink */
 698
 699         if (allocation->previous) {
 700                 (allocation->previous)->next = allocation->next;
 701         } else {
 702                 mem_list->list_head = allocation->next;
 703         }
 704
 705         if (allocation->next) {
 706                 (allocation->next)->previous = allocation->previous;
 707         }
 708
 709         /* Mark the segment as deleted */
 710
 711         ACPI_MEMSET(&allocation->user_space, 0xEA, allocation->size);
 712
 713         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Freeing size 0%X\n",
 714                           allocation->size));
 715
 716         status = acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 717         return_ACPI_STATUS(status);
 718 }
 719
 720 /*******************************************************************************
 721  *
 722  * FUNCTION:    acpi_ut_dump_allocation_info
 723  *
 724  * PARAMETERS:
 725  *
 726  * RETURN:      None
 727  *
 728  * DESCRIPTION: Print some info about the outstanding allocations.
 729  *
 730  ******************************************************************************/
 731
 732 #ifdef ACPI_FUTURE_USAGE
 733 void acpi_ut_dump_allocation_info(void)
 734 {
 735 /*
 736         struct acpi_memory_list         *mem_list;
 737 */
 738
 739         ACPI_FUNCTION_TRACE("ut_dump_allocation_info");
 740
 741 /*
 742         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 743                           ("%30s: %4d (%3d Kb)\n", "Current allocations",
 744                           mem_list->current_count,
 745                           ROUND_UP_TO_1K (mem_list->current_size)));
 746
 747         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 748                           ("%30s: %4d (%3d Kb)\n", "Max concurrent allocations",
 749                           mem_list->max_concurrent_count,
 750                           ROUND_UP_TO_1K (mem_list->max_concurrent_size)));
 751
 752         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 753                           ("%30s: %4d (%3d Kb)\n", "Total (all) internal objects",
 754                           running_object_count,
 755                           ROUND_UP_TO_1K (running_object_size)));
 756
 757         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 758                           ("%30s: %4d (%3d Kb)\n", "Total (all) allocations",
 759                           running_alloc_count,
 760                           ROUND_UP_TO_1K (running_alloc_size)));
 761
 762         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 763                           ("%30s: %4d (%3d Kb)\n", "Current Nodes",
 764                           acpi_gbl_current_node_count,
 765                           ROUND_UP_TO_1K (acpi_gbl_current_node_size)));
 766
 767         ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES,
 768                           ("%30s: %4d (%3d Kb)\n", "Max Nodes",
 769                           acpi_gbl_max_concurrent_node_count,
 770                           ROUND_UP_TO_1K ((acpi_gbl_max_concurrent_node_count *
 771                                          sizeof (struct acpi_namespace_node)))));
 772 */
 773         return_VOID;
 774 }
 775 #endif                          /*  ACPI_FUTURE_USAGE  */
 776
 777 /*******************************************************************************
 778  *
 779  * FUNCTION:    acpi_ut_dump_allocations
 780  *
 781  * PARAMETERS:  Component           - Component(s) to dump info for.
 782  *              Module              - Module to dump info for.  NULL means all.
 783  *
 784  * RETURN:      None
 785  *
 786  * DESCRIPTION: Print a list of all outstanding allocations.
 787  *
 788  ******************************************************************************/
 789
 790 void acpi_ut_dump_allocations(u32 component, char *module)
 791 {
 792         struct acpi_debug_mem_block *element;
 793         union acpi_descriptor *descriptor;
 794         u32 num_outstanding = 0;
 795
 796         ACPI_FUNCTION_TRACE("ut_dump_allocations");
 797
 798         /*
 799          * Walk the allocation list.
 800          */
 801         if (ACPI_FAILURE(acpi_ut_acquire_mutex(ACPI_MTX_MEMORY))) {
 802                 return;
 803         }
 804
 805         element = acpi_gbl_global_list->list_head;
 806         while (element) {
 807                 if ((element->component & component) &&
 808                     ((module == NULL)
 809                      || (0 == ACPI_STRCMP(module, element->module)))) {
 810                         /* Ignore allocated objects that are in a cache */
 811
 812                         descriptor =
 813                             ACPI_CAST_PTR(union acpi_descriptor,
 814                                           &element->user_space);
 815                         if (descriptor->descriptor_id != ACPI_DESC_TYPE_CACHED) {
 816                                 acpi_os_printf("%p Len %04X %9.9s-%d [%s] ",
 817                                                descriptor, element->size,
 818                                                element->module, element->line,
 819                                                acpi_ut_get_descriptor_name
 820                                                (descriptor));
 821
 822                                 /* Most of the elements will be Operand objects. */
 823
 824                                 switch (ACPI_GET_DESCRIPTOR_TYPE(descriptor)) {
 825                                 case ACPI_DESC_TYPE_OPERAND:
 826                                         acpi_os_printf("%12.12s R%hd",
 827                                                        acpi_ut_get_type_name
 828                                                        (descriptor->object.
 829                                                         common.type),
 830                                                        descriptor->object.
 831                                                        common.reference_count);
 832                                         break;
 833
 834                                 case ACPI_DESC_TYPE_PARSER:
 835                                         acpi_os_printf("aml_opcode %04hX",
 836                                                        descriptor->op.asl.
 837                                                        aml_opcode);
 838                                         break;
 839
 840                                 case ACPI_DESC_TYPE_NAMED:
 841                                         acpi_os_printf("%4.4s",
 842                                                        acpi_ut_get_node_name
 843                                                        (&descriptor->node));
 844                                         break;
 845
 846                                 default:
 847                                         break;
 848                                 }
 849
 850                                 acpi_os_printf("\n");
 851                                 num_outstanding++;
 852                         }
 853                 }
 854                 element = element->next;
 855         }
 856
 857         (void)acpi_ut_release_mutex(ACPI_MTX_MEMORY);
 858
 859         /* Print summary */
 860
 861         if (!num_outstanding) {
 862                 ACPI_INFO((AE_INFO, "No outstanding allocations"));
 863         } else {
 864                 ACPI_ERROR((AE_INFO,
 865                             "%d(%X) Outstanding allocations",
 866                             num_outstanding, num_outstanding));
 867         }
 868
 869         return_VOID;
 870 }
 871
 872 #endif                          /* #ifdef ACPI_DBG_TRACK_ALLOCATIONS */