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Message-Id: <20250918-work-namespace-ns_ref-v1-14-1b0a98ee041e@kernel.org>
Date: Thu, 18 Sep 2025 12:11:59 +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 14/14] ns: rename to __ns_ref
Make it easier to grep and rename to ns_count.
Signed-off-by: Christian Brauner <brauner@...nel.org>
---
include/linux/ns_common.h | 12 ++++++------
init/version-timestamp.c | 2 +-
ipc/msgutil.c | 2 +-
kernel/cgroup/cgroup.c | 2 +-
kernel/nscommon.c | 2 +-
kernel/pid.c | 2 +-
kernel/time/namespace.c | 2 +-
kernel/user.c | 2 +-
8 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
index a65da646aef7..24bbeb5161a5 100644
--- a/include/linux/ns_common.h
+++ b/include/linux/ns_common.h
@@ -29,7 +29,7 @@ struct ns_common {
struct dentry *stashed;
const struct proc_ns_operations *ops;
unsigned int inum;
- refcount_t count;
+ refcount_t __ns_ref; /* do not use directly */
union {
struct {
u64 ns_id;
@@ -95,19 +95,19 @@ void __ns_common_free(struct ns_common *ns);
static __always_inline __must_check bool __ns_ref_put(struct ns_common *ns)
{
- return refcount_dec_and_test(&ns->count);
+ return refcount_dec_and_test(&ns->__ns_ref);
}
static __always_inline __must_check bool __ns_ref_get(struct ns_common *ns)
{
- return refcount_inc_not_zero(&ns->count);
+ return refcount_inc_not_zero(&ns->__ns_ref);
}
-#define ns_ref_read(__ns) refcount_read(&to_ns_common((__ns))->count)
-#define ns_ref_inc(__ns) refcount_inc(&to_ns_common((__ns))->count)
+#define ns_ref_read(__ns) refcount_read(&to_ns_common((__ns))->__ns_ref)
+#define ns_ref_inc(__ns) refcount_inc(&to_ns_common((__ns))->__ns_ref)
#define ns_ref_get(__ns) __ns_ref_get(to_ns_common((__ns)))
#define ns_ref_put(__ns) __ns_ref_put(to_ns_common((__ns)))
#define ns_ref_put_and_lock(__ns, __lock) \
- refcount_dec_and_lock(&to_ns_common((__ns))->count, (__lock))
+ refcount_dec_and_lock(&to_ns_common((__ns))->__ns_ref, (__lock))
#endif
diff --git a/init/version-timestamp.c b/init/version-timestamp.c
index 043cbf80a766..547e522e6016 100644
--- a/init/version-timestamp.c
+++ b/init/version-timestamp.c
@@ -8,7 +8,7 @@
#include <linux/utsname.h>
struct uts_namespace init_uts_ns = {
- .ns.count = REFCOUNT_INIT(2),
+ .ns.__ns_ref = REFCOUNT_INIT(2),
.name = {
.sysname = UTS_SYSNAME,
.nodename = UTS_NODENAME,
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index bbf61275df41..d0f7dcf4c208 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -27,7 +27,7 @@ DEFINE_SPINLOCK(mq_lock);
* and not CONFIG_IPC_NS.
*/
struct ipc_namespace init_ipc_ns = {
- .ns.count = REFCOUNT_INIT(1),
+ .ns.__ns_ref = REFCOUNT_INIT(1),
.user_ns = &init_user_ns,
.ns.inum = PROC_IPC_INIT_INO,
#ifdef CONFIG_IPC_NS
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 092e6bf081ed..a0e24adceef0 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -219,7 +219,7 @@ static bool have_favordynmods __ro_after_init = IS_ENABLED(CONFIG_CGROUP_FAVOR_D
/* cgroup namespace for init task */
struct cgroup_namespace init_cgroup_ns = {
- .ns.count = REFCOUNT_INIT(2),
+ .ns.__ns_ref = REFCOUNT_INIT(2),
.user_ns = &init_user_ns,
.ns.ops = &cgroupns_operations,
.ns.inum = PROC_CGROUP_INIT_INO,
diff --git a/kernel/nscommon.c b/kernel/nscommon.c
index 7c1b07e2a6c9..7aa2be6a0c32 100644
--- a/kernel/nscommon.c
+++ b/kernel/nscommon.c
@@ -5,7 +5,7 @@
int __ns_common_init(struct ns_common *ns, const struct proc_ns_operations *ops, int inum)
{
- refcount_set(&ns->count, 1);
+ refcount_set(&ns->__ns_ref, 1);
ns->stashed = NULL;
ns->ops = ops;
ns->ns_id = 0;
diff --git a/kernel/pid.c b/kernel/pid.c
index c45a28c16cd2..e222426f745d 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -71,7 +71,7 @@ static int pid_max_max = PID_MAX_LIMIT;
* the scheme scales to up to 4 million PIDs, runtime.
*/
struct pid_namespace init_pid_ns = {
- .ns.count = REFCOUNT_INIT(2),
+ .ns.__ns_ref = REFCOUNT_INIT(2),
.idr = IDR_INIT(init_pid_ns.idr),
.pid_allocated = PIDNS_ADDING,
.level = 0,
diff --git a/kernel/time/namespace.c b/kernel/time/namespace.c
index d49c73015d6e..d70bdfb7b001 100644
--- a/kernel/time/namespace.c
+++ b/kernel/time/namespace.c
@@ -480,7 +480,7 @@ const struct proc_ns_operations timens_for_children_operations = {
};
struct time_namespace init_time_ns = {
- .ns.count = REFCOUNT_INIT(3),
+ .ns.__ns_ref = REFCOUNT_INIT(3),
.user_ns = &init_user_ns,
.ns.inum = PROC_TIME_INIT_INO,
.ns.ops = &timens_operations,
diff --git a/kernel/user.c b/kernel/user.c
index f46b1d41163b..17a742fb4e10 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -65,7 +65,7 @@ struct user_namespace init_user_ns = {
.nr_extents = 1,
},
},
- .ns.count = REFCOUNT_INIT(3),
+ .ns.__ns_ref = REFCOUNT_INIT(3),
.owner = GLOBAL_ROOT_UID,
.group = GLOBAL_ROOT_GID,
.ns.inum = PROC_USER_INIT_INO,
--
2.47.3
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