linux-kernel - [PATCH RFC DRAFT 10/50] ns: use anonymous struct to group list member

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Message-Id: <20251021-work-namespace-nstree-listns-v1-10-ad44261a8a5b@kernel.org>
Date: Tue, 21 Oct 2025 13:43:16 +0200
From: Christian Brauner <brauner@...nel.org>
To: linux-fsdevel@...r.kernel.org, Josef Bacik <josef@...icpanda.com>, 
 Jeff Layton <jlayton@...nel.org>
Cc: Jann Horn <jannh@...gle.com>, 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>, 
 Amir Goldstein <amir73il@...il.com>, Tejun Heo <tj@...nel.org>, 
 Johannes Weiner <hannes@...xchg.org>, Thomas Gleixner <tglx@...utronix.de>, 
 Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, 
 linux-kernel@...r.kernel.org, cgroups@...r.kernel.org, bpf@...r.kernel.org, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 netdev@...r.kernel.org, Arnd Bergmann <arnd@...db.de>, 
 Christian Brauner <brauner@...nel.org>
Subject: [PATCH RFC DRAFT 10/50] ns: use anonymous struct to group list
 member

Make it easier to spot that they belong together conceptually.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 include/linux/ns_common.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
index 5d19471235ab..34e072986955 100644
--- a/include/linux/ns_common.h
+++ b/include/linux/ns_common.h
@@ -115,8 +115,10 @@ struct ns_common {
 	union {
 		struct {
 			u64 ns_id;
-			struct rb_node ns_tree_node;
-			struct list_head ns_list_node;
+			struct /* per type rbtree and list */ {
+				struct rb_node ns_tree_node;
+				struct list_head ns_list_node;
+			};
 			atomic_t __ns_ref_active; /* do not use directly */
 		};
 		struct rcu_head ns_rcu;

-- 
2.47.3