linux-kernel - [PATCH 02/17] nstree: decouple from ns

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Message-Id: <20251110-work-namespace-nstree-fixes-v1-2-e8a9264e0fb9@kernel.org>
Date: Mon, 10 Nov 2025 16:08:14 +0100
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 02/17] nstree: decouple from ns_common header

Foward declare struct ns_common and remove the include of ns_common.h.
We want ns_common.h to possibly include nstree structures but not the
other way around.

Signed-off-by: Christian Brauner <brauner@...nel.org>
---
 include/linux/nstree.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/nstree.h b/include/linux/nstree.h
index 38674c6fa4f7..25040a98a92b 100644
--- a/include/linux/nstree.h
+++ b/include/linux/nstree.h
@@ -3,7 +3,6 @@
 #ifndef _LINUX_NSTREE_H
 #define _LINUX_NSTREE_H
 
-#include <linux/ns_common.h>
 #include <linux/nsproxy.h>
 #include <linux/rbtree.h>
 #include <linux/seqlock.h>
@@ -11,6 +10,8 @@
 #include <linux/cookie.h>
 #include <uapi/linux/nsfs.h>
 
+struct ns_common;
+
 extern struct ns_tree cgroup_ns_tree;
 extern struct ns_tree ipc_ns_tree;
 extern struct ns_tree mnt_ns_tree;

-- 
2.47.3