diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 728d5be9548c..2f11bbe376b0 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -537,6 +537,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p) spin_lock_init(&mm->page_table_lock); mm_init_aio(mm); mm_init_owner(mm, p); + clear_tlb_flush_pending(mm); if (likely(!mm_alloc_pgd(mm))) { mm->def_flags = 0; @@ -1034,6 +1035,11 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) sig->nr_threads = 1; atomic_set(&sig->live, 1); atomic_set(&sig->sigcnt, 1); + + /* list_add(thread_node, thread_head) without INIT_LIST_HEAD() */ + sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node); + tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head); + init_waitqueue_head(&sig->wait_chldexit); sig->curr_target = tsk; init_sigpending(&sig->shared_pending); @@ -1086,8 +1092,10 @@ static void rt_mutex_init_task(struct task_struct *p) { raw_spin_lock_init(&p->pi_lock); #ifdef CONFIG_RT_MUTEXES - plist_head_init(&p->pi_waiters); + p->pi_waiters = RB_ROOT; + p->pi_waiters_leftmost = NULL; p->pi_blocked_on = NULL; + p->pi_top_task = NULL; #endif } @@ -1171,7 +1179,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, * do not allow it to share a thread group or signal handlers or * parent with the forking task. */ - if (clone_flags & (CLONE_SIGHAND | CLONE_PARENT)) { + if (clone_flags & CLONE_SIGHAND) { if ((clone_flags & (CLONE_NEWUSER | CLONE_NEWPID)) || (task_active_pid_ns(current) != current->nsproxy->pid_ns_for_children)) @@ -1310,7 +1318,9 @@ static struct task_struct *copy_process(unsigned long clone_flags, #endif /* Perform scheduler related setup. Assign this task to a CPU. */ - sched_fork(clone_flags, p); + retval = sched_fork(clone_flags, p); + if (retval) + goto bad_fork_cleanup_policy; retval = perf_event_init_task(p); if (retval) @@ -1402,13 +1412,11 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->tgid = p->pid; } - p->pdeath_signal = 0; - p->exit_state = 0; - p->nr_dirtied = 0; p->nr_dirtied_pause = 128 >> (PAGE_SHIFT - 10); p->dirty_paused_when = 0; + p->pdeath_signal = 0; INIT_LIST_HEAD(&p->thread_group); p->task_works = NULL; @@ -1471,6 +1479,8 @@ static struct task_struct *copy_process(unsigned long clone_flags, atomic_inc(¤t->signal->sigcnt); list_add_tail_rcu(&p->thread_group, &p->group_leader->thread_group); + list_add_tail_rcu(&p->thread_node, + &p->signal->thread_head); } attach_pid(p, PIDTYPE_PID); nr_threads++; |