diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 580d052ae81428c030ce0f0e536400296f503896..59967116898000a5a9a0aef1f3ced4802395174f 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -197,8 +197,8 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
 	/* Create the ucontext. */
 	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(0, &frame->uc.uc_link);
-	err |= __put_user((void *)current->sas_ss_sp,
+	err |= __put_user(NULL, &frame->uc.uc_link);
+	err |= __put_user((void __user *)current->sas_ss_sp,
 			&frame->uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->r1),
 			&frame->uc.uc_stack.ss_flags);