diff options
| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-02-02 13:40:55 -0600 | 
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2009-02-02 13:40:55 -0600 | 
| commit | 8db0c5d5ef3ab99fe9e5151872b75f45c4282e3c (patch) | |
| tree | da9759151e00221c58cdd9f4de893c0b08753670 /drivers/acpi/utilities/utmutex.c | |
| parent | 1ad53a98c927a9b5b1b57288ac0edec562fbcf8d (diff) | |
| parent | 45c82b5a770be66845687a7d027c8b52946d59af (diff) | |
Merge branch 'master' of /home/shaggy/git/linus-clean/
Diffstat (limited to 'drivers/acpi/utilities/utmutex.c')
| -rw-r--r-- | drivers/acpi/utilities/utmutex.c | 341 | 
1 files changed, 0 insertions, 341 deletions
diff --git a/drivers/acpi/utilities/utmutex.c b/drivers/acpi/utilities/utmutex.c deleted file mode 100644 index 7331dde9e1b3..000000000000 --- a/drivers/acpi/utilities/utmutex.c +++ /dev/null @@ -1,341 +0,0 @@ -/******************************************************************************* - * - * Module Name: utmutex - local mutex support - * - ******************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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_UTILITIES -ACPI_MODULE_NAME("utmutex") - -/* Local prototypes */ -static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id); - -static acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id); - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_mutex_initialize - * - * PARAMETERS:  None. - * - * RETURN:      Status - * - * DESCRIPTION: Create the system mutex objects. - * - ******************************************************************************/ - -acpi_status acpi_ut_mutex_initialize(void) -{ -	u32 i; -	acpi_status status; - -	ACPI_FUNCTION_TRACE(ut_mutex_initialize); - -	/* -	 * Create each of the predefined mutex objects -	 */ -	for (i = 0; i < ACPI_NUM_MUTEX; i++) { -		status = acpi_ut_create_mutex(i); -		if (ACPI_FAILURE(status)) { -			return_ACPI_STATUS(status); -		} -	} - -	/* Create the spinlocks for use at interrupt level */ - -	spin_lock_init(acpi_gbl_gpe_lock); -	spin_lock_init(acpi_gbl_hardware_lock); - -	return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_mutex_terminate - * - * PARAMETERS:  None. - * - * RETURN:      None. - * - * DESCRIPTION: Delete all of the system mutex objects. - * - ******************************************************************************/ - -void acpi_ut_mutex_terminate(void) -{ -	u32 i; - -	ACPI_FUNCTION_TRACE(ut_mutex_terminate); - -	/* -	 * Delete each predefined mutex object -	 */ -	for (i = 0; i < ACPI_NUM_MUTEX; i++) { -		(void)acpi_ut_delete_mutex(i); -	} - -	/* Delete the spinlocks */ - -	acpi_os_delete_lock(acpi_gbl_gpe_lock); -	acpi_os_delete_lock(acpi_gbl_hardware_lock); -	return_VOID; -} - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_create_mutex - * - * PARAMETERS:  mutex_iD        - ID of the mutex to be created - * - * RETURN:      Status - * - * DESCRIPTION: Create a mutex object. - * - ******************************************************************************/ - -static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id) -{ -	acpi_status status = AE_OK; - -	ACPI_FUNCTION_TRACE_U32(ut_create_mutex, mutex_id); - -	if (mutex_id > ACPI_MAX_MUTEX) { -		return_ACPI_STATUS(AE_BAD_PARAMETER); -	} - -	if (!acpi_gbl_mutex_info[mutex_id].mutex) { -		status = -		    acpi_os_create_mutex(&acpi_gbl_mutex_info[mutex_id].mutex); -		acpi_gbl_mutex_info[mutex_id].thread_id = -		    ACPI_MUTEX_NOT_ACQUIRED; -		acpi_gbl_mutex_info[mutex_id].use_count = 0; -	} - -	return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_delete_mutex - * - * PARAMETERS:  mutex_iD        - ID of the mutex to be deleted - * - * RETURN:      Status - * - * DESCRIPTION: Delete a mutex object. - * - ******************************************************************************/ - -static acpi_status acpi_ut_delete_mutex(acpi_mutex_handle mutex_id) -{ - -	ACPI_FUNCTION_TRACE_U32(ut_delete_mutex, mutex_id); - -	if (mutex_id > ACPI_MAX_MUTEX) { -		return_ACPI_STATUS(AE_BAD_PARAMETER); -	} - -	acpi_os_delete_mutex(acpi_gbl_mutex_info[mutex_id].mutex); - -	acpi_gbl_mutex_info[mutex_id].mutex = NULL; -	acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED; - -	return_ACPI_STATUS(AE_OK); -} - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_acquire_mutex - * - * PARAMETERS:  mutex_iD        - ID of the mutex to be acquired - * - * RETURN:      Status - * - * DESCRIPTION: Acquire a mutex object. - * - ******************************************************************************/ - -acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id) -{ -	acpi_status status; -	acpi_thread_id this_thread_id; - -	ACPI_FUNCTION_NAME(ut_acquire_mutex); - -	if (mutex_id > ACPI_MAX_MUTEX) { -		return (AE_BAD_PARAMETER); -	} - -	this_thread_id = acpi_os_get_thread_id(); - -#ifdef ACPI_MUTEX_DEBUG -	{ -		u32 i; -		/* -		 * Mutex debug code, for internal debugging only. -		 * -		 * Deadlock prevention.  Check if this thread owns any mutexes of value -		 * greater than or equal to this one.  If so, the thread has violated -		 * the mutex ordering rule.  This indicates a coding error somewhere in -		 * the ACPI subsystem code. -		 */ -		for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) { -			if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) { -				if (i == mutex_id) { -					ACPI_ERROR((AE_INFO, -						    "Mutex [%s] already acquired by this thread [%X]", -						    acpi_ut_get_mutex_name -						    (mutex_id), -						    this_thread_id)); - -					return (AE_ALREADY_ACQUIRED); -				} - -				ACPI_ERROR((AE_INFO, -					    "Invalid acquire order: Thread %X owns [%s], wants [%s]", -					    this_thread_id, -					    acpi_ut_get_mutex_name(i), -					    acpi_ut_get_mutex_name(mutex_id))); - -				return (AE_ACQUIRE_DEADLOCK); -			} -		} -	} -#endif - -	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, -			  "Thread %lX attempting to acquire Mutex [%s]\n", -			  (unsigned long)this_thread_id, -			  acpi_ut_get_mutex_name(mutex_id))); - -	status = acpi_os_acquire_mutex(acpi_gbl_mutex_info[mutex_id].mutex, -				       ACPI_WAIT_FOREVER); -	if (ACPI_SUCCESS(status)) { -		ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, -				  "Thread %lX acquired Mutex [%s]\n", -				  (unsigned long)this_thread_id, -				  acpi_ut_get_mutex_name(mutex_id))); - -		acpi_gbl_mutex_info[mutex_id].use_count++; -		acpi_gbl_mutex_info[mutex_id].thread_id = this_thread_id; -	} else { -		ACPI_EXCEPTION((AE_INFO, status, -				"Thread %lX could not acquire Mutex [%X]", -				(unsigned long)this_thread_id, mutex_id)); -	} - -	return (status); -} - -/******************************************************************************* - * - * FUNCTION:    acpi_ut_release_mutex - * - * PARAMETERS:  mutex_iD        - ID of the mutex to be released - * - * RETURN:      Status - * - * DESCRIPTION: Release a mutex object. - * - ******************************************************************************/ - -acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id) -{ -	acpi_thread_id this_thread_id; - -	ACPI_FUNCTION_NAME(ut_release_mutex); - -	this_thread_id = acpi_os_get_thread_id(); -	ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, -			  "Thread %lX releasing Mutex [%s]\n", -			  (unsigned long)this_thread_id, -			  acpi_ut_get_mutex_name(mutex_id))); - -	if (mutex_id > ACPI_MAX_MUTEX) { -		return (AE_BAD_PARAMETER); -	} - -	/* -	 * Mutex must be acquired in order to release it! -	 */ -	if (acpi_gbl_mutex_info[mutex_id].thread_id == ACPI_MUTEX_NOT_ACQUIRED) { -		ACPI_ERROR((AE_INFO, -			    "Mutex [%X] is not acquired, cannot release", -			    mutex_id)); - -		return (AE_NOT_ACQUIRED); -	} -#ifdef ACPI_MUTEX_DEBUG -	{ -		u32 i; -		/* -		 * Mutex debug code, for internal debugging only. -		 * -		 * Deadlock prevention.  Check if this thread owns any mutexes of value -		 * greater than this one.  If so, the thread has violated the mutex -		 * ordering rule.  This indicates a coding error somewhere in -		 * the ACPI subsystem code. -		 */ -		for (i = mutex_id; i < ACPI_NUM_MUTEX; i++) { -			if (acpi_gbl_mutex_info[i].thread_id == this_thread_id) { -				if (i == mutex_id) { -					continue; -				} - -				ACPI_ERROR((AE_INFO, -					    "Invalid release order: owns [%s], releasing [%s]", -					    acpi_ut_get_mutex_name(i), -					    acpi_ut_get_mutex_name(mutex_id))); - -				return (AE_RELEASE_DEADLOCK); -			} -		} -	} -#endif - -	/* Mark unlocked FIRST */ - -	acpi_gbl_mutex_info[mutex_id].thread_id = ACPI_MUTEX_NOT_ACQUIRED; - -	acpi_os_release_mutex(acpi_gbl_mutex_info[mutex_id].mutex); -	return (AE_OK); -}  | 
