}
EXPORT_SYMBOL(free_task);
-void __put_task_struct(struct task_struct *tsk)
+void __put_task_struct_cb(struct rcu_head *rhp)
{
+ struct task_struct *tsk = container_of(rhp, struct task_struct, rcu);
+
WARN_ON(!(tsk->exit_state & (EXIT_DEAD | EXIT_ZOMBIE)));
WARN_ON(atomic_read(&tsk->usage));
WARN_ON(tsk == current);
*/
p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr: NULL;
+ /*
+ * sigaltstack should be cleared when sharing the same VM
+ */
+ if ((clone_flags & (CLONE_VM|CLONE_VFORK)) == CLONE_VM)
+ p->sas_ss_sp = p->sas_ss_size = 0;
+
/*
* Syscall tracing should be turned off in the child regardless
* of CLONE_PTRACE.
if (unlikely(p->ptrace & PT_PTRACED))
__ptrace_link(p, current->parent);
- attach_pid(p, PIDTYPE_PID, p->pid);
- attach_pid(p, PIDTYPE_TGID, p->tgid);
if (thread_group_leader(p)) {
p->signal->tty = current->signal->tty;
p->signal->pgrp = process_group(current);
if (p->pid)
__get_cpu_var(process_counts)++;
}
+ attach_pid(p, PIDTYPE_TGID, p->tgid);
+ attach_pid(p, PIDTYPE_PID, p->pid);
nr_threads++;
total_forks++;
if ((unshare_flags & CLONE_VM) &&
(mm && atomic_read(&mm->mm_users) > 1)) {
- *new_mmp = dup_mm(current);
- if (!*new_mmp)
- return -ENOMEM;
+ return -EINVAL;
}
return 0;
if (new_sigh) {
sigh = current->sighand;
- current->sighand = new_sigh;
+ rcu_assign_pointer(current->sighand, new_sigh);
new_sigh = sigh;
}