From: Jeff Dike init_irq_signals doesn't need to be called from the context of a new process. It initializes handlers, which are useless in process context. With that call gone, init_irq_signals has only one caller, so it can be inlined into init_new_thread_signals. Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton --- arch/um/include/os.h | 1 - arch/um/os-Linux/irq.c | 11 ----------- arch/um/os-Linux/process.c | 5 ++++- 3 files changed, 4 insertions(+), 13 deletions(-) diff -puN arch/um/include/os.h~uml-remove-init_irq_signals arch/um/include/os.h --- a/arch/um/include/os.h~uml-remove-init_irq_signals +++ a/arch/um/include/os.h @@ -285,7 +285,6 @@ extern void os_free_irq_later(struct irq extern int os_get_pollfd(int i); extern void os_set_pollfd(int i, int fd); extern void os_set_ioignore(void); -extern void init_irq_signals(int on_sigstack); /* sigio.c */ extern int add_sigio_fd(int fd); diff -puN arch/um/os-Linux/irq.c~uml-remove-init_irq_signals arch/um/os-Linux/irq.c --- a/arch/um/os-Linux/irq.c~uml-remove-init_irq_signals +++ a/arch/um/os-Linux/irq.c @@ -136,14 +136,3 @@ void os_set_ioignore(void) { signal(SIGIO, SIG_IGN); } - -void init_irq_signals(int on_sigstack) -{ - int flags; - - flags = on_sigstack ? SA_ONSTACK : 0; - - set_handler(SIGIO, (__sighandler_t) sig_handler, flags | SA_RESTART, - SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1); - signal(SIGWINCH, SIG_IGN); -} diff -puN arch/um/os-Linux/process.c~uml-remove-init_irq_signals arch/um/os-Linux/process.c --- a/arch/um/os-Linux/process.c~uml-remove-init_irq_signals +++ a/arch/um/os-Linux/process.c @@ -249,7 +249,10 @@ void init_new_thread_signals(void) SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1); signal(SIGHUP, SIG_IGN); - init_irq_signals(1); + set_handler(SIGIO, (__sighandler_t) sig_handler, + SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM, + SIGVTALRM, -1); + signal(SIGWINCH, SIG_IGN); } int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr) _