nsproxy: extract create_nsproxy()
clone_nsproxy() does useless copying of old nsproxy -- every pointer will
be rewritten to new ns or to old ns. Remove copying, rename
clone_nsproxy(), create_nsproxy() will be used by C/R code to create fresh
nsproxy on restart.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 63598dc..09b4ff9 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -26,19 +26,14 @@
struct nsproxy init_nsproxy = INIT_NSPROXY(init_nsproxy);
-/*
- * creates a copy of "orig" with refcount 1.
- */
-static inline struct nsproxy *clone_nsproxy(struct nsproxy *orig)
+static inline struct nsproxy *create_nsproxy(void)
{
- struct nsproxy *ns;
+ struct nsproxy *nsproxy;
- ns = kmem_cache_alloc(nsproxy_cachep, GFP_KERNEL);
- if (ns) {
- memcpy(ns, orig, sizeof(struct nsproxy));
- atomic_set(&ns->count, 1);
- }
- return ns;
+ nsproxy = kmem_cache_alloc(nsproxy_cachep, GFP_KERNEL);
+ if (nsproxy)
+ atomic_set(&nsproxy->count, 1);
+ return nsproxy;
}
/*
@@ -52,7 +47,7 @@
struct nsproxy *new_nsp;
int err;
- new_nsp = clone_nsproxy(tsk->nsproxy);
+ new_nsp = create_nsproxy();
if (!new_nsp)
return ERR_PTR(-ENOMEM);