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-rw-r--r--include/linux/nsproxy.h16
1 files changed, 6 insertions, 10 deletions
diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index b4ec59d..35fa08f 100644
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -40,32 +40,28 @@ extern struct nsproxy init_nsproxy;
* the namespaces access rules are:
*
* 1. only current task is allowed to change tsk->nsproxy pointer or
- * any pointer on the nsproxy itself
+ * any pointer on the nsproxy itself. Current must hold the task_lock
+ * when changing tsk->nsproxy.
*
* 2. when accessing (i.e. reading) current task's namespaces - no
* precautions should be taken - just dereference the pointers
*
* 3. the access to other task namespaces is performed like this
- * rcu_read_lock();
- * nsproxy = task_nsproxy(tsk);
+ * task_lock(task);
+ * nsproxy = task->nsproxy;
* if (nsproxy != NULL) {
* / *
* * work with the namespaces here
* * e.g. get the reference on one of them
* * /
* } / *
- * * NULL task_nsproxy() means that this task is
+ * * NULL task->nsproxy means that this task is
* * almost dead (zombie)
* * /
- * rcu_read_unlock();
+ * task_unlock(task);
*
*/
-static inline struct nsproxy *task_nsproxy(struct task_struct *tsk)
-{
- return rcu_dereference(tsk->nsproxy);
-}
-
int copy_namespaces(unsigned long flags, struct task_struct *tsk);
void exit_task_namespaces(struct task_struct *tsk);
void switch_task_namespaces(struct task_struct *tsk, struct nsproxy *new);
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