[PATCH] uml: ifdef a mode-specific function

uml_idle_timer is tt-mode only, so ifdef it as such to make it easier to spot
when tt mode is killed.

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>
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 31fb323..4ae73c0 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -66,6 +66,7 @@
 		       errno);
 }
 
+#ifdef UML_CONFIG_MODE_TT
 void uml_idle_timer(void)
 {
 	if(signal(SIGVTALRM, SIG_IGN) == SIG_ERR)
@@ -75,6 +76,7 @@
 		    SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
 	set_interval(ITIMER_REAL);
 }
+#endif
 
 unsigned long long os_nsecs(void)
 {