ACPI: acpi_os_get_thread_id() returns current

Linux mutexes and the debug code that that reference
acpi_os_get_thread_id() are happy with 0.
But the AML mutexes in exmutex.c expect a unique non-zero
number for each thread - as they track this thread_id
to permit the mutex re-entrancy defined by the ACPI spec.

http://bugzilla.kernel.org/show_bug.cgi?id=6687

Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 6 insertions, 6 deletions

diff --git a/drivers/acpi/utilities/utdebug.c b/drivers/acpi/utilities/utdebug.c
index 5ec1cfcc611d..bb1eaf9aa653 100644
--- a/drivers/acpi/utilities/utdebug.c
+++ b/drivers/acpi/utilities/utdebug.c
@@ -47,7 +47,7 @@
 ACPI_MODULE_NAME("utdebug")
 
 #ifdef ACPI_DEBUG_OUTPUT
-static u32 acpi_gbl_prev_thread_id = 0xFFFFFFFF;
+static acpi_thread_id acpi_gbl_prev_thread_id;
 static char *acpi_gbl_fn_entry_str = "----Entry";
 static char *acpi_gbl_fn_exit_str = "----Exit-";
 
@@ -181,7 +181,7 @@ acpi_ut_debug_print(u32 requested_debug_level,
                 if (ACPI_LV_THREADS & acpi_dbg_level) {
                         acpi_os_printf
                             ("\n**** Context Switch from TID %X to TID %X ****\n\n",
-                             acpi_gbl_prev_thread_id, thread_id);
+                             (u32) acpi_gbl_prev_thread_id, (u32) thread_id);
                 }
 
                 acpi_gbl_prev_thread_id = thread_id;
diff --git a/drivers/acpi/utilities/utmutex.c b/drivers/acpi/utilities/utmutex.c
index dfc8f30ca892..c39062a047cd 100644
--- a/drivers/acpi/utilities/utmutex.c
+++ b/drivers/acpi/utilities/utmutex.c
@@ -244,14 +244,14 @@ acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
 
         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
                           "Thread %X attempting to acquire Mutex [%s]\n",
-                          this_thread_id, acpi_ut_get_mutex_name(mutex_id)));
+                          (u32) 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 %X acquired Mutex [%s]\n",
-                                  this_thread_id,
+                                  (u32) this_thread_id,
                                   acpi_ut_get_mutex_name(mutex_id)));
 
                 acpi_gbl_mutex_info[mutex_id].use_count++;
@@ -259,7 +259,7 @@ acpi_status acpi_ut_acquire_mutex(acpi_mutex_handle mutex_id)
         } else {
                 ACPI_EXCEPTION((AE_INFO, status,
                                 "Thread %X could not acquire Mutex [%X]",
-                                this_thread_id, mutex_id));
+                                (u32) this_thread_id, mutex_id));
         }
 
         return (status);
@@ -285,7 +285,7 @@ acpi_status acpi_ut_release_mutex(acpi_mutex_handle mutex_id)
 
         this_thread_id = acpi_os_get_thread_id();
         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
-                          "Thread %X releasing Mutex [%s]\n", this_thread_id,
+                          "Thread %X releasing Mutex [%s]\n", (u32) this_thread_id,
                           acpi_ut_get_mutex_name(mutex_id)));
 
         if (mutex_id > ACPI_MAX_MUTEX) {