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-rw-r--r--include/acpi/aclocal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/acpi/aclocal.h b/include/acpi/aclocal.h
index 56b80248616..fbafee6e56d 100644
--- a/include/acpi/aclocal.h
+++ b/include/acpi/aclocal.h
@@ -127,7 +127,7 @@ typedef u8 acpi_owner_id;
/* This Thread ID means that the mutex is not in use (unlocked) */
-#define ACPI_MUTEX_NOT_ACQUIRED (u32) -1
+#define ACPI_MUTEX_NOT_ACQUIRED (acpi_thread_id) 0
/* Table for the global mutexes */