[S390] uaccess: use might_fault() instead of might_sleep()

Adds more checking in case lockdep is turned on.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 10bccd1..c18b21d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -512,7 +512,7 @@
 		BUG();
 	}
 
-	might_sleep();
+	might_fault();
 
 	do {
 		__vcpu_run(vcpu);