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userns: Use cred->user_ns instead of cred->user->user_ns

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Optimize performance and prepare for the removal of the user_ns reference
from user_struct.  Remove the slow long walk through cred->user->user_ns and
instead go straight to cred->user_ns.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman
2011-11-16 23:15:31 -08:00
parent 7e6bd8fadd
commit c4a4d60379
12 changed files with 24 additions and 24 deletions
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2
ipc/namespace.c
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@@ -46,7 +46,7 @@ static struct ipc_namespace *create_ipc_ns(struct task_struct *tsk,
ipcns_notify(IPCNS_CREATED);
register_ipcns_notifier(ns);
ns->user_ns = get_user_ns(task_cred_xxx(tsk, user)->user_ns);
ns->user_ns = get_user_ns(task_cred_xxx(tsk, user_ns));
return ns;
}