From: Christian Brauner <brauner@kernel.org>
Date: Thu, 18 Sep 2025 10:11:52 +0000 (+0200)
Subject: user: port to ns_ref_*() helpers
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=96d997ea5ad1911cc393ffdb5c928b532f2f921a;p=users%2Fhch%2Fmisc.git

user: port to ns_ref_*() helpers

Stop accessing ns.count directly.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index a09056ad090e..9a9aebbf96b9 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -176,7 +176,7 @@ static inline struct user_namespace *to_user_ns(struct ns_common *ns)
 static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
 {
 	if (ns)
-		refcount_inc(&ns->ns.count);
+		ns_ref_inc(ns);
 	return ns;
 }
 
@@ -186,7 +186,7 @@ extern void __put_user_ns(struct user_namespace *ns);
 
 static inline void put_user_ns(struct user_namespace *ns)
 {
-	if (ns && refcount_dec_and_test(&ns->ns.count))
+	if (ns && ns_ref_put(ns))
 		__put_user_ns(ns);
 }
 
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index 32406bcab526..f9df45c46235 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -225,7 +225,7 @@ static void free_user_ns(struct work_struct *work)
 		kfree_rcu(ns, ns.ns_rcu);
 		dec_user_namespaces(ucounts);
 		ns = parent;
-	} while (refcount_dec_and_test(&parent->ns.count));
+	} while (ns_ref_put(parent));
 }
 
 void __put_user_ns(struct user_namespace *ns)