Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: dsmethod - Parser/Interpreter interface - control method parsing |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 6c9deb7 | 2007-02-02 19:48:24 +0300 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/amlcode.h> |
| 46 | #include <acpi/acdispat.h> |
| 47 | #include <acpi/acinterp.h> |
| 48 | #include <acpi/acnamesp.h> |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 49 | #include <acpi/acdisasm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define _COMPONENT ACPI_DISPATCHER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("dsmethod") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 54 | /* Local prototypes */ |
| 55 | static acpi_status |
| 56 | acpi_ds_create_method_mutex(union acpi_operand_object *method_desc); |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /******************************************************************************* |
| 59 | * |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 60 | * FUNCTION: acpi_ds_method_error |
| 61 | * |
| 62 | * PARAMETERS: Status - Execution status |
| 63 | * walk_state - Current state |
| 64 | * |
| 65 | * RETURN: Status |
| 66 | * |
| 67 | * DESCRIPTION: Called on method error. Invoke the global exception handler if |
| 68 | * present, dump the method data if the disassembler is configured |
| 69 | * |
| 70 | * Note: Allows the exception handler to change the status code |
| 71 | * |
| 72 | ******************************************************************************/ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 73 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 74 | acpi_status |
| 75 | acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state) |
| 76 | { |
| 77 | ACPI_FUNCTION_ENTRY(); |
| 78 | |
| 79 | /* Ignore AE_OK and control exception codes */ |
| 80 | |
| 81 | if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) { |
| 82 | return (status); |
| 83 | } |
| 84 | |
| 85 | /* Invoke the global exception handler */ |
| 86 | |
| 87 | if (acpi_gbl_exception_handler) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 88 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 89 | /* Exit the interpreter, allow handler to execute methods */ |
| 90 | |
| 91 | acpi_ex_exit_interpreter(); |
| 92 | |
| 93 | /* |
| 94 | * Handler can map the exception code to anything it wants, including |
| 95 | * AE_OK, in which case the executing method will not be aborted. |
| 96 | */ |
| 97 | status = acpi_gbl_exception_handler(status, |
| 98 | walk_state->method_node ? |
| 99 | walk_state->method_node-> |
| 100 | name.integer : 0, |
| 101 | walk_state->opcode, |
| 102 | walk_state->aml_offset, |
| 103 | NULL); |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 104 | acpi_ex_enter_interpreter(); |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 105 | } |
| 106 | #ifdef ACPI_DISASSEMBLER |
| 107 | if (ACPI_FAILURE(status)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 108 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 109 | /* Display method locals/args if disassembler is present */ |
| 110 | |
| 111 | acpi_dm_dump_method_info(status, walk_state, walk_state->op); |
| 112 | } |
| 113 | #endif |
| 114 | |
| 115 | return (status); |
| 116 | } |
| 117 | |
| 118 | /******************************************************************************* |
| 119 | * |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 120 | * FUNCTION: acpi_ds_create_method_mutex |
| 121 | * |
| 122 | * PARAMETERS: obj_desc - The method object |
| 123 | * |
| 124 | * RETURN: Status |
| 125 | * |
| 126 | * DESCRIPTION: Create a mutex object for a serialized control method |
| 127 | * |
| 128 | ******************************************************************************/ |
| 129 | |
| 130 | static acpi_status |
| 131 | acpi_ds_create_method_mutex(union acpi_operand_object *method_desc) |
| 132 | { |
| 133 | union acpi_operand_object *mutex_desc; |
| 134 | acpi_status status; |
| 135 | |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 136 | ACPI_FUNCTION_TRACE(ds_create_method_mutex); |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 137 | |
| 138 | /* Create the new mutex object */ |
| 139 | |
| 140 | mutex_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); |
| 141 | if (!mutex_desc) { |
| 142 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 143 | } |
| 144 | |
| 145 | /* Create the actual OS Mutex */ |
| 146 | |
| 147 | status = acpi_os_create_mutex(&mutex_desc->mutex.os_mutex); |
| 148 | if (ACPI_FAILURE(status)) { |
| 149 | return_ACPI_STATUS(status); |
| 150 | } |
| 151 | |
| 152 | mutex_desc->mutex.sync_level = method_desc->method.sync_level; |
| 153 | method_desc->method.mutex = mutex_desc; |
| 154 | return_ACPI_STATUS(AE_OK); |
| 155 | } |
| 156 | |
| 157 | /******************************************************************************* |
| 158 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | * FUNCTION: acpi_ds_begin_method_execution |
| 160 | * |
| 161 | * PARAMETERS: method_node - Node of the method |
| 162 | * obj_desc - The method object |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 163 | * walk_state - current state, NULL if not yet executing |
| 164 | * a method. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | * |
| 166 | * RETURN: Status |
| 167 | * |
| 168 | * DESCRIPTION: Prepare a method for execution. Parses the method if necessary, |
| 169 | * increments the thread count, and waits at the method semaphore |
| 170 | * for clearance to execute. |
| 171 | * |
| 172 | ******************************************************************************/ |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | acpi_status |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 175 | acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node, |
| 176 | union acpi_operand_object *obj_desc, |
| 177 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 179 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 181 | ACPI_FUNCTION_TRACE_PTR(ds_begin_method_execution, method_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | if (!method_node) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 184 | return_ACPI_STATUS(AE_NULL_ENTRY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 187 | /* Prevent wraparound of thread count */ |
| 188 | |
| 189 | if (obj_desc->method.thread_count == ACPI_UINT8_MAX) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 190 | ACPI_ERROR((AE_INFO, |
| 191 | "Method reached maximum reentrancy limit (255)")); |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 192 | return_ACPI_STATUS(AE_AML_METHOD_LIMIT); |
| 193 | } |
| 194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | /* |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 196 | * If this method is serialized, we need to acquire the method mutex. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | */ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 198 | if (obj_desc->method.method_flags & AML_METHOD_SERIALIZED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | /* |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 200 | * Create a mutex for the method if it is defined to be Serialized |
| 201 | * and a mutex has not already been created. We defer the mutex creation |
| 202 | * until a method is actually executed, to minimize the object count |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | */ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 204 | if (!obj_desc->method.mutex) { |
| 205 | status = acpi_ds_create_method_mutex(obj_desc); |
| 206 | if (ACPI_FAILURE(status)) { |
| 207 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | |
| 211 | /* |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 212 | * The current_sync_level (per-thread) must be less than or equal to |
| 213 | * the sync level of the method. This mechanism provides some |
| 214 | * deadlock prevention |
| 215 | * |
| 216 | * Top-level method invocation has no walk state at this point |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | */ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 218 | if (walk_state && |
| 219 | (walk_state->thread->current_sync_level > |
| 220 | obj_desc->method.mutex->mutex.sync_level)) { |
| 221 | ACPI_ERROR((AE_INFO, |
| 222 | "Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%d)", |
| 223 | acpi_ut_get_node_name(method_node), |
| 224 | walk_state->thread->current_sync_level)); |
| 225 | |
| 226 | return_ACPI_STATUS(AE_AML_MUTEX_ORDER); |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 227 | } |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 228 | |
| 229 | /* |
| 230 | * Obtain the method mutex if necessary. Do not acquire mutex for a |
| 231 | * recursive call. |
| 232 | */ |
Len Brown | 262a7a2 | 2007-05-09 23:01:59 -0400 | [diff] [blame] | 233 | if (!walk_state || |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 234 | !obj_desc->method.mutex->mutex.thread_id || |
| 235 | (walk_state->thread->thread_id != |
| 236 | obj_desc->method.mutex->mutex.thread_id)) { |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 237 | /* |
| 238 | * Acquire the method mutex. This releases the interpreter if we |
| 239 | * block (and reacquires it before it returns) |
| 240 | */ |
| 241 | status = |
| 242 | acpi_ex_system_wait_mutex(obj_desc->method.mutex-> |
| 243 | mutex.os_mutex, |
| 244 | ACPI_WAIT_FOREVER); |
| 245 | if (ACPI_FAILURE(status)) { |
| 246 | return_ACPI_STATUS(status); |
| 247 | } |
| 248 | |
| 249 | /* Update the mutex and walk info and save the original sync_level */ |
| 250 | |
| 251 | if (walk_state) { |
| 252 | obj_desc->method.mutex->mutex. |
| 253 | original_sync_level = |
| 254 | walk_state->thread->current_sync_level; |
| 255 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 256 | obj_desc->method.mutex->mutex.thread_id = |
| 257 | walk_state->thread->thread_id; |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 258 | walk_state->thread->current_sync_level = |
| 259 | obj_desc->method.sync_level; |
| 260 | } else { |
| 261 | obj_desc->method.mutex->mutex. |
| 262 | original_sync_level = |
| 263 | obj_desc->method.mutex->mutex.sync_level; |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | /* Always increase acquisition depth */ |
| 268 | |
| 269 | obj_desc->method.mutex->mutex.acquisition_depth++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | /* |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 273 | * Allocate an Owner ID for this method, only if this is the first thread |
| 274 | * to begin concurrent execution. We only need one owner_id, even if the |
| 275 | * method is invoked recursively. |
| 276 | */ |
| 277 | if (!obj_desc->method.owner_id) { |
| 278 | status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id); |
| 279 | if (ACPI_FAILURE(status)) { |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 280 | goto cleanup; |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 281 | } |
| 282 | } |
| 283 | |
| 284 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | * Increment the method parse tree thread count since it has been |
| 286 | * reentered one more time (even if it is the same thread) |
| 287 | */ |
| 288 | obj_desc->method.thread_count++; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 289 | return_ACPI_STATUS(status); |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 290 | |
| 291 | cleanup: |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 292 | /* On error, must release the method mutex (if present) */ |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 293 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 294 | if (obj_desc->method.mutex) { |
| 295 | acpi_os_release_mutex(obj_desc->method.mutex->mutex.os_mutex); |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 296 | } |
| 297 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | /******************************************************************************* |
| 301 | * |
| 302 | * FUNCTION: acpi_ds_call_control_method |
| 303 | * |
| 304 | * PARAMETERS: Thread - Info for this thread |
| 305 | * this_walk_state - Current walk state |
| 306 | * Op - Current Op to be walked |
| 307 | * |
| 308 | * RETURN: Status |
| 309 | * |
| 310 | * DESCRIPTION: Transfer execution to a called control method |
| 311 | * |
| 312 | ******************************************************************************/ |
| 313 | |
| 314 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 315 | acpi_ds_call_control_method(struct acpi_thread_state *thread, |
| 316 | struct acpi_walk_state *this_walk_state, |
| 317 | union acpi_parse_object *op) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 319 | acpi_status status; |
| 320 | struct acpi_namespace_node *method_node; |
| 321 | struct acpi_walk_state *next_walk_state = NULL; |
| 322 | union acpi_operand_object *obj_desc; |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 323 | struct acpi_evaluate_info *info; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 324 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 326 | ACPI_FUNCTION_TRACE_PTR(ds_call_control_method, this_walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 328 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Valery Podrezov | 9bc75cf | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 329 | "Calling method %p, currentstate=%p\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 330 | this_walk_state->prev_op, this_walk_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
| 332 | /* |
| 333 | * Get the namespace entry for the control method we are about to call |
| 334 | */ |
| 335 | method_node = this_walk_state->method_call_node; |
| 336 | if (!method_node) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 337 | return_ACPI_STATUS(AE_NULL_ENTRY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | obj_desc = acpi_ns_get_attached_object(method_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | if (!obj_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 342 | return_ACPI_STATUS(AE_NULL_OBJECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 345 | /* Init for new method, possibly wait on method mutex */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 347 | status = acpi_ds_begin_method_execution(method_node, obj_desc, |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 348 | this_walk_state); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 349 | if (ACPI_FAILURE(status)) { |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 350 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Valery Podrezov | 9bc75cf | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 353 | /* Begin method parse/execution. Create a new walk state */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 355 | next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id, |
| 356 | NULL, obj_desc, thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | if (!next_walk_state) { |
| 358 | status = AE_NO_MEMORY; |
| 359 | goto cleanup; |
| 360 | } |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 361 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | /* |
| 363 | * The resolved arguments were put on the previous walk state's operand |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 364 | * stack. Operands on the previous walk state stack always |
| 365 | * start at index 0. Also, null terminate the list of arguments |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 367 | this_walk_state->operands[this_walk_state->num_operands] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 369 | /* |
| 370 | * Allocate and initialize the evaluation information block |
| 371 | * TBD: this is somewhat inefficient, should change interface to |
| 372 | * ds_init_aml_walk. For now, keeps this struct off the CPU stack |
| 373 | */ |
| 374 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
| 375 | if (!info) { |
| 376 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 377 | } |
| 378 | |
| 379 | info->parameters = &this_walk_state->operands[0]; |
| 380 | info->parameter_type = ACPI_PARAM_ARGS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 382 | status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node, |
| 383 | obj_desc->method.aml_start, |
Bob Moore | ec3153f | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 384 | obj_desc->method.aml_length, info, |
| 385 | ACPI_IMODE_EXECUTE); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 386 | |
| 387 | ACPI_FREE(info); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 388 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | goto cleanup; |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * Delete the operands on the previous walkstate operand stack |
| 394 | * (they were copied to new objects) |
| 395 | */ |
| 396 | for (i = 0; i < obj_desc->method.param_count; i++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 397 | acpi_ut_remove_reference(this_walk_state->operands[i]); |
| 398 | this_walk_state->operands[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | /* Clear the operand stack */ |
| 402 | |
| 403 | this_walk_state->num_operands = 0; |
| 404 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 405 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Valery Podrezov | 9bc75cf | 2007-02-02 19:48:21 +0300 | [diff] [blame] | 406 | "**** Begin nested execution of [%4.4s] **** WalkState=%p\n", |
| 407 | method_node->name.ascii, next_walk_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 409 | /* Invoke an internal method if necessary */ |
| 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 412 | status = obj_desc->method.implementation(next_walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 415 | return_ACPI_STATUS(status); |
| 416 | |
| 417 | cleanup: |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 418 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 419 | /* On error, we must terminate the method properly */ |
| 420 | |
| 421 | acpi_ds_terminate_control_method(obj_desc, next_walk_state); |
| 422 | if (next_walk_state) { |
| 423 | acpi_ds_delete_walk_state(next_walk_state); |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 424 | } |
Len Brown | a94f188 | 2005-09-03 00:09:12 -0400 | [diff] [blame] | 425 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 426 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | } |
| 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | /******************************************************************************* |
| 430 | * |
| 431 | * FUNCTION: acpi_ds_restart_control_method |
| 432 | * |
| 433 | * PARAMETERS: walk_state - State for preempted method (caller) |
| 434 | * return_desc - Return value from the called method |
| 435 | * |
| 436 | * RETURN: Status |
| 437 | * |
| 438 | * DESCRIPTION: Restart a method that was preempted by another (nested) method |
| 439 | * invocation. Handle the return value (if any) from the callee. |
| 440 | * |
| 441 | ******************************************************************************/ |
| 442 | |
| 443 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 444 | acpi_ds_restart_control_method(struct acpi_walk_state *walk_state, |
| 445 | union acpi_operand_object *return_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 447 | acpi_status status; |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 448 | int same_as_implicit_return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 450 | ACPI_FUNCTION_TRACE_PTR(ds_restart_control_method, walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 452 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 453 | "****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n", |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 454 | acpi_ut_get_node_name(walk_state->method_node), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | walk_state->method_call_op, return_desc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 457 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 458 | " ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 459 | walk_state->return_used, |
| 460 | walk_state->results, walk_state)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | /* Did the called method return a value? */ |
| 463 | |
| 464 | if (return_desc) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 465 | |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 466 | /* Is the implicit return object the same as the return desc? */ |
| 467 | |
| 468 | same_as_implicit_return = |
| 469 | (walk_state->implicit_return_obj == return_desc); |
| 470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | /* Are we actually going to use the return value? */ |
| 472 | |
| 473 | if (walk_state->return_used) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 474 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | /* Save the return value from the previous method */ |
| 476 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 477 | status = acpi_ds_result_push(return_desc, walk_state); |
| 478 | if (ACPI_FAILURE(status)) { |
| 479 | acpi_ut_remove_reference(return_desc); |
| 480 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Save as THIS method's return value in case it is returned |
| 485 | * immediately to yet another method |
| 486 | */ |
| 487 | walk_state->return_desc = return_desc; |
| 488 | } |
| 489 | |
| 490 | /* |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 491 | * The following code is the optional support for the so-called |
| 492 | * "implicit return". Some AML code assumes that the last value of the |
| 493 | * method is "implicitly" returned to the caller, in the absence of an |
| 494 | * explicit return value. |
| 495 | * |
| 496 | * Just save the last result of the method as the return value. |
| 497 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | * NOTE: this is optional because the ASL language does not actually |
| 499 | * support this behavior. |
| 500 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 501 | else if (!acpi_ds_do_implicit_return |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 502 | (return_desc, walk_state, FALSE) |
| 503 | || same_as_implicit_return) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | /* |
| 505 | * Delete the return value if it will not be used by the |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 506 | * calling method or remove one reference if the explicit return |
| 507 | * is the same as the implicit return value. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 509 | acpi_ut_remove_reference(return_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | } |
| 512 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 513 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | /******************************************************************************* |
| 517 | * |
| 518 | * FUNCTION: acpi_ds_terminate_control_method |
| 519 | * |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 520 | * PARAMETERS: method_desc - Method object |
| 521 | * walk_state - State associated with the method |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | * |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 523 | * RETURN: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | * |
| 525 | * DESCRIPTION: Terminate a control method. Delete everything that the method |
| 526 | * created, delete all locals and arguments, and delete the parse |
| 527 | * tree if requested. |
| 528 | * |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 529 | * MUTEX: Interpreter is locked |
| 530 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | ******************************************************************************/ |
| 532 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 533 | void |
| 534 | acpi_ds_terminate_control_method(union acpi_operand_object *method_desc, |
| 535 | struct acpi_walk_state *walk_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 538 | ACPI_FUNCTION_TRACE_PTR(ds_terminate_control_method, walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 540 | /* method_desc is required, walk_state is optional */ |
| 541 | |
| 542 | if (!method_desc) { |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 543 | return_VOID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } |
| 545 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 546 | if (walk_state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 548 | /* Delete all arguments and locals */ |
| 549 | |
| 550 | acpi_ds_method_data_delete_all(walk_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 552 | /* |
| 553 | * If method is serialized, release the mutex and restore the |
| 554 | * current sync level for this thread |
| 555 | */ |
| 556 | if (method_desc->method.mutex) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 558 | /* Acquisition Depth handles recursive calls */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 560 | method_desc->method.mutex->mutex.acquisition_depth--; |
| 561 | if (!method_desc->method.mutex->mutex.acquisition_depth) { |
| 562 | walk_state->thread->current_sync_level = |
| 563 | method_desc->method.mutex->mutex. |
| 564 | original_sync_level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 566 | acpi_os_release_mutex(method_desc->method. |
| 567 | mutex->mutex.os_mutex); |
| 568 | method_desc->method.mutex->mutex.thread_id = 0; |
| 569 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 572 | /* |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 573 | * Delete any namespace objects created anywhere within |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 574 | * the namespace by the execution of this method |
| 575 | */ |
| 576 | acpi_ns_delete_namespace_by_owner(method_desc->method.owner_id); |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 577 | } |
| 578 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 579 | /* Decrement the thread count on the method */ |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 580 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 581 | if (method_desc->method.thread_count) { |
| 582 | method_desc->method.thread_count--; |
| 583 | } else { |
| 584 | ACPI_ERROR((AE_INFO, "Invalid zero thread count in method")); |
| 585 | } |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 586 | |
| 587 | /* Are there any other threads currently executing this method? */ |
| 588 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 589 | if (method_desc->method.thread_count) { |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 590 | /* |
| 591 | * Additional threads. Do not release the owner_id in this case, |
| 592 | * we immediately reuse it for the next thread executing this method |
| 593 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 594 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 595 | "*** Completed execution of one thread, %d threads remaining\n", |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 596 | method_desc->method.thread_count)); |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 597 | } else { |
| 598 | /* This is the only executing thread for this method */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | /* |
| 601 | * Support to dynamically change a method from not_serialized to |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 602 | * Serialized if it appears that the method is incorrectly written and |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 603 | * does not support multiple thread execution. The best example of this |
| 604 | * is if such a method creates namespace objects and blocks. A second |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | * thread will fail with an AE_ALREADY_EXISTS exception |
| 606 | * |
| 607 | * This code is here because we must wait until the last thread exits |
| 608 | * before creating the synchronization semaphore. |
| 609 | */ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 610 | if ((method_desc->method.method_flags & AML_METHOD_SERIALIZED) |
| 611 | && (!method_desc->method.mutex)) { |
Bob Moore | b7f9f04 | 2008-04-10 19:06:40 +0400 | [diff] [blame^] | 612 | (void)acpi_ds_create_method_mutex(method_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Bob Moore | 28f55eb | 2005-12-02 18:27:00 -0500 | [diff] [blame] | 615 | /* No more threads, we can free the owner_id */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 617 | acpi_ut_release_owner_id(&method_desc->method.owner_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |
Len Brown | a94f188 | 2005-09-03 00:09:12 -0400 | [diff] [blame] | 619 | |
Robert Moore | aff8c27 | 2005-09-02 17:24:17 -0400 | [diff] [blame] | 620 | return_VOID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |