uml: remove init_irq_signals

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 <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 4 insertions, 13 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index b9779ac5e5d7..0b6b62733303 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -285,7 +285,6 @@ extern void os_free_irq_later(struct irq_fd *active_fds,
 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 --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c
index 430866ca1ce4..0348b975e81c 100644
--- a/arch/um/os-Linux/irq.c
+++ b/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 --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index bda5c3150d6c..abf6beae3df1 100644
--- a/arch/um/os-Linux/process.c
+++ b/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)