acpi_mutex
ACPI_GLOBAL(acpi_mutex, acpi_gbl_osi_mutex);
acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout);
acpi_mutex writer_mutex;
acpi_mutex reader_mutex;
acpi_mutex mutex;
acpi_mutex os_mutex; /* Actual OS synchronization object */
acpi_mutex context_mutex;
acpi_mutex main_thread_gate;
acpi_mutex thread_complete_gate;
acpi_mutex info_gate;
acpi_mutex context_mutex;
acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout)
acpi_status acpi_os_create_mutex(acpi_mutex * out_handle);
void acpi_os_delete_mutex(acpi_mutex handle);
acpi_status acpi_os_acquire_mutex(acpi_mutex handle, u16 timeout);
void acpi_os_release_mutex(acpi_mutex handle);
#ifndef acpi_mutex