Index: kernel/arch/sparc64/include/asm.h
===================================================================
--- kernel/arch/sparc64/include/asm.h	(revision 3a2f8aa1cef1886a9586c9987617553007802c3f)
+++ kernel/arch/sparc64/include/asm.h	(revision b4cbef1df4af24ecf6ce8b7e766827011666ebf1)
@@ -430,5 +430,5 @@
 }
 
-extern void cpu_halt(void);
+extern void cpu_halt(void) __attribute__((noreturn));
 extern void cpu_sleep(void);
 extern void asm_delay_loop(const uint32_t usec);