[PATCH] um: remove dead code about os_usr1_signal() and os_usr1_process()

os_usr1_signal() is totally unused, os_usr1_process() is used only by TT mode.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 8629bd1..5c74da4 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -192,7 +192,9 @@
 extern void os_stop_process(int pid);
 extern void os_kill_process(int pid, int reap_child);
 extern void os_kill_ptraced_process(int pid, int reap_child);
+#ifdef UML_CONFIG_MODE_TT
 extern void os_usr1_process(int pid);
+#endif
 extern long os_ptrace_ldt(long pid, long addr, long data);
 
 extern int os_getpid(void);
@@ -261,7 +263,6 @@
 extern void unblock_signals(void);
 extern int get_signals(void);
 extern int set_signals(int enable);
-extern void os_usr1_signal(int on);
 
 /* trap.c */
 extern void os_fill_handlinfo(struct kern_handlers h);