[PATCH] misc NULL noise

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/acpi/events/evmisc.c b/drivers/acpi/events/evmisc.c
index 8dcade6..3a799b9 100644
--- a/drivers/acpi/events/evmisc.c
+++ b/drivers/acpi/events/evmisc.c
@@ -549,7 +549,7 @@
 	acpi_gbl_global_lock_acquired = FALSE;
 
 	/* Release the local GL mutex */
-	acpi_ev_global_lock_thread_id = 0;
+	acpi_ev_global_lock_thread_id = NULL;
 	acpi_ev_global_lock_acquired = 0;
 	acpi_os_release_mutex(acpi_gbl_global_lock_mutex);
 	return_ACPI_STATUS(status);