diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index 9665a26a253a..995ab7b80f69 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -154,6 +154,13 @@ static inline void set_restore_sigmask(void)
 	ti->local_flags |= _TLF_RESTORE_SIGMASK;
 	set_bit(TIF_SIGPENDING, &ti->flags);
 }
+
+#ifdef CONFIG_PPC64
+#define is_32bit_task()	(test_thread_flag(TIF_32BIT))
+#else
+#define is_32bit_task()	(1)
+#endif
+
 #endif	/* !__ASSEMBLY__ */
 
 #endif /* __KERNEL__ */
diff --git a/arch/powerpc/kernel/signal.h b/arch/powerpc/kernel/signal.h
index b427bf8e1d8f..f1442d69d4ec 100644
--- a/arch/powerpc/kernel/signal.h
+++ b/arch/powerpc/kernel/signal.h
@@ -39,22 +39,12 @@ extern unsigned long copy_vsx_from_user(struct task_struct *task,
 
 #ifdef CONFIG_PPC64
 
-static inline int is_32bit_task(void)
-{
-	return test_thread_flag(TIF_32BIT);
-}
-
 extern int handle_rt_signal64(int signr, struct k_sigaction *ka,
 			      siginfo_t *info, sigset_t *set,
 			      struct pt_regs *regs);
 
 #else /* CONFIG_PPC64 */
 
-static inline int is_32bit_task(void)
-{
-	return 1;
-}
-
 static inline int handle_rt_signal64(int signr, struct k_sigaction *ka,
 				     siginfo_t *info, sigset_t *set,
 				     struct pt_regs *regs)