[PATCH] UML: fix wall_to_monotonic initialization

Change a variable from unsigned to signed in order to get sign-extension
when the thing is negated.  Without this, uptime is horribly confused.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/kernel/time_kern.c b/arch/um/kernel/time_kern.c
index 86f51d0..87cdbc5 100644
--- a/arch/um/kernel/time_kern.c
+++ b/arch/um/kernel/time_kern.c
@@ -87,7 +87,7 @@
 
 void time_init_kern(void)
 {
-	unsigned long long nsecs;
+	long long nsecs;
 
 	nsecs = os_nsecs();
 	set_normalized_timespec(&wall_to_monotonic, -nsecs / BILLION,