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.
Index: linux-2.6.22/arch/um/include/os.h
===================================================================
--- linux-2.6.22.orig/arch/um/include/os.h 2007-09-12 16:45:28.000000000 -0400
+++ linux-2.6.22/arch/um/include/os.h 2007-09-13 10:46:34.000000000 -0400
@@ -299,7 +299,6 @@ 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);
Index: linux-2.6.22/arch/um/os-Linux/irq.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/irq.c 2007-09-12 16:44:34.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/irq.c 2007-09-13 10:47:13.000000000 -0400
@@ -138,14 +138,3 @@ 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);
-}
Index: linux-2.6.22/arch/um/os-Linux/process.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/process.c 2007-09-12 16:44:34.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/process.c 2007-09-13 10:46:34.000000000 -0400
@@ -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)
Index: linux-2.6.22/arch/um/os-Linux/skas/process.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/skas/process.c 2007-09-13 10:45:15.000000000 -0400
+++ linux-2.6.22/arch/um/os-Linux/skas/process.c 2007-09-13 10:46:34.000000000 -0400
@@ -177,7 +177,6 @@ static int userspace_tramp(void *stack)
ptrace(PTRACE_TRACEME, 0, 0, 0);
- init_new_thread_signals();
err = set_interval();
if (err)
panic("userspace_tramp - setting timer failed, errno = %d\n",