uml: host_info tidying

Move the host_info string from util.c to um_arch.c, where it is
actually initialized and used.  Also document its lack of locking.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 56b8a50..125854a 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -96,15 +96,13 @@
 	strcpy(machine_out, host.machine);
 }
 
-char host_info[(_UTSNAME_LENGTH + 1) * 4 + _UTSNAME_NODENAME_LENGTH + 1];
-
-void setup_hostinfo(void)
+void setup_hostinfo(char *buf, int len)
 {
 	struct utsname host;
 
 	uname(&host);
-	sprintf(host_info, "%s %s %s %s %s", host.sysname, host.nodename,
-		host.release, host.version, host.machine);
+	snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename,
+		 host.release, host.version, host.machine);
 }
 
 int setjmp_wrapper(void (*proc)(void *, void *), ...)