[PATCH] uml: signal initialization cleanup

It turns out that init_new_thread_signals is always called with altstack == 1,
so we can eliminate the parameter.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

6 files changed, 14 insertions, 15 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index f88856c28a66..700f7a76c822 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 2135eaf98a93..55caeec8b257 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 5c1e4cc1c049..ad66df17d9d7 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 8368c2dbe635..1e86f0bfef72 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 233be2f4f8cb..b1cda818f5b5 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 bd89c6b99d5d..bf35572d9cfa 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){