1 files changed, 22 insertions, 16 deletions

diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index f6de4ed3d527..bb658777fa88 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -787,7 +787,6 @@ acpi_ut_release_mutex (
         acpi_mutex_handle               mutex_id)
 {
         acpi_status                     status;
-        u32                             i;
         u32                             this_thread_id;
 
 
@@ -814,25 +813,32 @@ acpi_ut_release_mutex (
                 return (AE_NOT_ACQUIRED);
         }
 
-        /*
-         * 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 < MAX_MUTEX; i++) {
-                if (acpi_gbl_mutex_info[i].owner_id == this_thread_id) {
-                        if (i == mutex_id) {
-                                continue;
-                        }
+#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 < MAX_MUTEX; i++) {
+                        if (acpi_gbl_mutex_info[i].owner_id == this_thread_id) {
+                                if (i == mutex_id) {
+                                        continue;
+                                }
 
-                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
-                                "Invalid release order: owns [%s], releasing [%s]\n",
-                                acpi_ut_get_mutex_name (i), acpi_ut_get_mutex_name (mutex_id)));
+                                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+                                        "Invalid release order: owns [%s], releasing [%s]\n",
+                                        acpi_ut_get_mutex_name (i), acpi_ut_get_mutex_name (mutex_id)));
 
-                        return (AE_RELEASE_DEADLOCK);
+                                return (AE_RELEASE_DEADLOCK);
+                        }
                 }
         }
+#endif
 
         /* Mark unlocked FIRST */