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Diffstat (limited to 'include/linux/user_namespace.h')
-rw-r--r--include/linux/user_namespace.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index b9bd2e6c73cc..4ce009324933 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -21,7 +21,7 @@ struct user_namespace {
struct uid_gid_map uid_map;
struct uid_gid_map gid_map;
struct uid_gid_map projid_map;
- struct kref kref;
+ atomic_t count;
struct user_namespace *parent;
kuid_t owner;
kgid_t group;
@@ -35,18 +35,18 @@ extern struct user_namespace init_user_ns;
static inline struct user_namespace *get_user_ns(struct user_namespace *ns)
{
if (ns)
- kref_get(&ns->kref);
+ atomic_inc(&ns->count);
return ns;
}
extern int create_user_ns(struct cred *new);
extern int unshare_userns(unsigned long unshare_flags, struct cred **new_cred);
-extern void free_user_ns(struct kref *kref);
+extern void free_user_ns(struct user_namespace *ns);
static inline void put_user_ns(struct user_namespace *ns)
{
- if (ns)
- kref_put(&ns->kref, free_user_ns);
+ if (ns && atomic_dec_and_test(&ns->count))
+ free_user_ns(ns);
}
struct seq_operations;