file->f_op is never NULL...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/mm/nommu.c b/mm/nommu.c
index ecd1f15..9e6cb02 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -937,7 +937,7 @@
 		struct address_space *mapping;
 
 		/* files must support mmap */
-		if (!file->f_op || !file->f_op->mmap)
+		if (!file->f_op->mmap)
 			return -ENODEV;
 
 		/* work out if what we've got could possibly be shared