[PATCH 15/17] pid: rely on common reference count behavior

[Christian Brauner <brauner@kernel.org>]

Now that we changed the generic reference counting mechanism for all
namespaces to never manipulate reference counts of initial namespaces we
can drop the special handling for pid namespaces.

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

diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 445517a72ad0..0e7ae12c96d2 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -61,8 +61,7 @@ static inline struct pid_namespace *to_pid_ns(struct ns_common *ns)
 
 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
 {
-	if (ns != &init_pid_ns)
-		ns_ref_inc(ns);
+	ns_ref_inc(ns);
 	return ns;
 }
 
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 650be58d8d18..e48f5de41361 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -184,7 +184,7 @@ struct pid_namespace *copy_pid_ns(u64 flags,
 
 void put_pid_ns(struct pid_namespace *ns)
 {
-	if (ns && ns != &init_pid_ns && ns_ref_put(ns))
+	if (ns && ns_ref_put(ns))
 		schedule_work(&ns->work);
 }
 EXPORT_SYMBOL_GPL(put_pid_ns);

-- 
2.47.3