fs/verity/setup.c: include vmalloc.h

Signed-off-by: Eric Biggers <ebiggers@google.com>
diff --git a/fs/verity/setup.c b/fs/verity/setup.c
index 6c8664d..1e2b103 100644
--- a/fs/verity/setup.c
+++ b/fs/verity/setup.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/ratelimit.h>
 #include <linux/verification.h>
+#include <linux/vmalloc.h>
 
 static struct kmem_cache *fsverity_info_cachep;