1 files changed, 2 insertions, 0 deletions

diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
index cba516e6c99a..fa90db964b28 100644
--- a/arch/um/kernel/init_task.c
+++ b/arch/um/kernel/init_task.c
@@ -47,7 +47,9 @@ union thread_union cpu0_irqstack
         __attribute__((__section__(".data.init_irqstack"))) =
                 { INIT_THREAD_INFO(init_task) };
 
+#ifdef CONFIG_MODE_TT
 void unprotect_stack(unsigned long stack)
 {
         os_protect_memory((void *) stack, THREAD_SIZE, 1, 1, 0);
 }
+#endif