diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index f88856c28a66eda6ea6dfe7dba4502401c3ffa5c..700f7a76c822f763a78ae3be8c5387c465f4bda8 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -199,7 +199,7 @@ extern int os_getpid(void);
 extern int os_getpgrp(void);
 
 extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
-extern void init_new_thread_signals(int altstack);
+extern void init_new_thread_signals(void);
 extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
 
 extern int os_map_memory(void *virt, int fd, unsigned long long off,
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 2135eaf98a938122e87a269aee5f11f3cf0199de..55caeec8b25725d856db3af7a00d678277a520e5 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -177,7 +177,7 @@ int start_uml_skas(void)
 	if(proc_mm)
 		userspace_pid[0] = start_userspace(0);
 
-	init_new_thread_signals(1);
+	init_new_thread_signals();
 
 	init_task.thread.request.u.thread.proc = start_kernel_proc;
 	init_task.thread.request.u.thread.arg = NULL;
diff --git a/arch/um/kernel/tt/exec_kern.c b/arch/um/kernel/tt/exec_kern.c
index 5c1e4cc1c0493aa85bd86e7e1bc41dff1ea2c086..ad66df17d9d75b8a22bd147b8fac97286ccd16f9 100644
--- a/arch/um/kernel/tt/exec_kern.c
+++ b/arch/um/kernel/tt/exec_kern.c
@@ -21,7 +21,7 @@
 static int exec_tramp(void *sig_stack)
 {
 	init_new_thread_stack(sig_stack, NULL);
-	init_new_thread_signals(1);
+	init_new_thread_signals();
 	os_stop_process(os_getpid());
 	return(0);
 }
diff --git a/arch/um/kernel/tt/process_kern.c b/arch/um/kernel/tt/process_kern.c
index 8368c2dbe635c7727fe4578a8c804d5057541121..1e86f0bfef72b3368eacf491db28166293051bcb 100644
--- a/arch/um/kernel/tt/process_kern.c
+++ b/arch/um/kernel/tt/process_kern.c
@@ -142,7 +142,7 @@ static void new_thread_handler(int sig)
 		schedule_tail(current->thread.prev_sched);
 	current->thread.prev_sched = NULL;
 
-	init_new_thread_signals(1);
+	init_new_thread_signals();
 	enable_timer();
 	free_page(current->thread.temp_stack);
 	set_cmdline("(kernel thread)");
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 233be2f4f8cb96726f270d47e23da0a35a7658c0..b1cda818f5b5755e5ae601c2a39ee3b35f143816 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -250,25 +250,24 @@ void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
 	if(usr1_handler) set_handler(SIGUSR1, usr1_handler, flags, -1);
 }
 
-void init_new_thread_signals(int altstack)
+void init_new_thread_signals(void)
 {
-	int flags = altstack ? SA_ONSTACK : 0;
-
-	set_handler(SIGSEGV, (__sighandler_t) sig_handler, flags,
+	set_handler(SIGSEGV, (__sighandler_t) sig_handler, SA_ONSTACK,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGTRAP, (__sighandler_t) sig_handler, flags,
+	set_handler(SIGTRAP, (__sighandler_t) sig_handler, SA_ONSTACK,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGFPE, (__sighandler_t) sig_handler, flags,
+	set_handler(SIGFPE, (__sighandler_t) sig_handler, SA_ONSTACK,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGILL, (__sighandler_t) sig_handler, flags,
+	set_handler(SIGILL, (__sighandler_t) sig_handler, SA_ONSTACK,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
-	set_handler(SIGBUS, (__sighandler_t) sig_handler, flags,
+	set_handler(SIGBUS, (__sighandler_t) sig_handler, SA_ONSTACK,
 		    SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
 	set_handler(SIGUSR2, (__sighandler_t) sig_handler,
-		    flags, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM, -1);
+		    SA_ONSTACK, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, SIGVTALRM,
+		    -1);
 	signal(SIGHUP, SIG_IGN);
 
-	init_irq_signals(altstack);
+	init_irq_signals(1);
 }
 
 int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr)
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index bd89c6b99d5dcf6d58b55eefe68fb280331bea61..bf35572d9cfa6e319976ce6fba4c05fdd2d3b2ce 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -159,7 +159,7 @@ static int userspace_tramp(void *stack)
 
 	ptrace(PTRACE_TRACEME, 0, 0, 0);
 
-	init_new_thread_signals(1);
+	init_new_thread_signals();
 	enable_timer();
 
 	if(!proc_mm){