netdev - [PATCH 04/14] ipc: port to ns_ref

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Message-Id: <20250918-work-namespace-ns_ref-v1-4-1b0a98ee041e@kernel.org>
Date: Thu, 18 Sep 2025 12:11:49 +0200
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org
Cc: Amir Goldstein <amir73il@...il.com>, Josef Bacik <josef@...icpanda.com>, 
 Jeff Layton <jlayton@...nel.org>, Mike Yuan <me@...dnzj.com>, 
 Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>, 
 Lennart Poettering <mzxreary@...inter.de>, 
 Daan De Meyer <daan.j.demeyer@...il.com>, Aleksa Sarai <cyphar@...har.com>, 
 Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, 
 Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>, 
 Michal Koutný <mkoutny@...e.com>, 
 Jakub Kicinski <kuba@...nel.org>, 
 Anna-Maria Behnsen <anna-maria@...utronix.de>, 
 Frederic Weisbecker <frederic@...nel.org>, 
 Thomas Gleixner <tglx@...utronix.de>, cgroups@...r.kernel.org, 
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH 04/14] ipc: port to ns_ref_*() helpers

Stop accessing ns.count directly.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 include/linux/ipc_namespace.h | 4 ++--
 ipc/namespace.c               | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index 924e4754374f..21eff63f47da 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -140,14 +140,14 @@ extern struct ipc_namespace *copy_ipcs(unsigned long flags,
 static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
 {
 	if (ns)
-		refcount_inc(&ns->ns.count);
+		ns_ref_inc(ns);
 	return ns;
 }
 
 static inline struct ipc_namespace *get_ipc_ns_not_zero(struct ipc_namespace *ns)
 {
 	if (ns) {
-		if (refcount_inc_not_zero(&ns->ns.count))
+		if (ns_ref_get(ns))
 			return ns;
 	}
 
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 09d261a1a2aa..bd85d1c9d2c2 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -199,7 +199,7 @@ static void free_ipc(struct work_struct *unused)
  */
 void put_ipc_ns(struct ipc_namespace *ns)
 {
-	if (refcount_dec_and_lock(&ns->ns.count, &mq_lock)) {
+	if (ns_ref_put_and_lock(ns, &mq_lock)) {
 		mq_clear_sbinfo(ns);
 		spin_unlock(&mq_lock);
 

-- 
2.47.3