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-rw-r--r--include/linux/pid_namespace.h8
-rw-r--r--kernel/pid_namespace.c21
2 files changed, 15 insertions, 14 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 00474b0..65e3e87 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -47,15 +47,9 @@ static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
}
extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns);
-extern void free_pid_ns(struct kref *kref);
extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
-
-static inline void put_pid_ns(struct pid_namespace *ns)
-{
- if (ns != &init_pid_ns)
- kref_put(&ns->kref, free_pid_ns);
-}
+extern void put_pid_ns(struct pid_namespace *ns);
#else /* !CONFIG_PID_NS */
#include <linux/err.h>
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 478bad2..eb00be2 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -133,19 +133,26 @@ struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *old
return create_pid_namespace(old_ns);
}
-void free_pid_ns(struct kref *kref)
+static void free_pid_ns(struct kref *kref)
{
- struct pid_namespace *ns, *parent;
+ struct pid_namespace *ns;
ns = container_of(kref, struct pid_namespace, kref);
-
- parent = ns->parent;
destroy_pid_namespace(ns);
+}
- if (parent != NULL)
- put_pid_ns(parent);
+void put_pid_ns(struct pid_namespace *ns)
+{
+ struct pid_namespace *parent;
+
+ while (ns != &init_pid_ns) {
+ parent = ns->parent;
+ if (!kref_put(&ns->kref, free_pid_ns))
+ break;
+ ns = parent;
+ }
}
-EXPORT_SYMBOL_GPL(free_pid_ns);
+EXPORT_SYMBOL_GPL(put_pid_ns);
void zap_pid_ns_processes(struct pid_namespace *pid_ns)
{
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