diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 5c97d0e..f2684e5 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1797,6 +1797,18 @@
 	return err;
 }
 
+static inline int EX_RDONLY(struct svc_export *exp, struct svc_rqst *rqstp)
+{
+	struct exp_flavor_info *f;
+	struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
+
+	for (f = exp->ex_flavors; f < end; f++) {
+		if (f->pseudoflavor == rqstp->rq_flavor)
+			return f->flags & NFSEXP_READONLY;
+	}
+	return exp->ex_flags & NFSEXP_READONLY;
+}
+
 /*
  * Check for a user's access permissions to this inode.
  */