2 files changed, 1 insertions, 3 deletions

diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index d4df6be66d58..85814e74677d 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -66,8 +66,6 @@ endif
 
 endif
 
-cflags-$(CONFIG_ARC_DW2_UNWIND)         += -fasynchronous-unwind-tables
-
 # By default gcc 4.8 generates dwarf4 which kernel unwinder can't grok
 ifeq ($(atleast_gcc48),y)
 cflags-$(CONFIG_ARC_DW2_UNWIND)         += -gdwarf-2
diff --git a/arch/arc/kernel/stacktrace.c b/arch/arc/kernel/stacktrace.c
index e0efff15a5ae..b9192a653b7e 100644
--- a/arch/arc/kernel/stacktrace.c
+++ b/arch/arc/kernel/stacktrace.c
@@ -142,7 +142,7 @@ arc_unwind_core(struct task_struct *tsk, struct pt_regs *regs,
          * prelogue is setup (callee regs saved and then fp set and not other
          * way around
          */
-        pr_warn("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
+        pr_warn_once("CONFIG_ARC_DW2_UNWIND needs to be enabled\n");
         return 0;
 
 #endif