diff options
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 6545fd61b10..b409df3b2e9 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2003,8 +2003,8 @@ static int css_set_prefetch(struct cgroup *cgrp, struct css_set *cg, * @cgrp: the cgroup to attach to * @leader: the threadgroup leader task_struct of the group to be attached * - * Call holding cgroup_mutex and the threadgroup_fork_lock of the leader. Will - * take task_lock of each thread in leader's threadgroup individually in turn. + * Call holding cgroup_mutex and the group_rwsem of the leader. Will take + * task_lock of each thread in leader's threadgroup individually in turn. */ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader) { @@ -2030,8 +2030,8 @@ int cgroup_attach_proc(struct cgroup *cgrp, struct task_struct *leader) * step 0: in order to do expensive, possibly blocking operations for * every thread, we cannot iterate the thread group list, since it needs * rcu or tasklist locked. instead, build an array of all threads in the - * group - threadgroup_fork_lock prevents new threads from appearing, - * and if threads exit, this will just be an over-estimate. + * group - group_rwsem prevents new threads from appearing, and if + * threads exit, this will just be an over-estimate. */ group_size = get_nr_threads(leader); /* flex_array supports very large thread-groups better than kmalloc. */ @@ -2249,7 +2249,6 @@ static int attach_task_by_pid(struct cgroup *cgrp, u64 pid, bool threadgroup) cgroup_unlock(); return -ESRCH; } - /* * even if we're attaching all tasks in the thread group, we * only need to check permissions on one of them. @@ -2273,9 +2272,9 @@ static int attach_task_by_pid(struct cgroup *cgrp, u64 pid, bool threadgroup) } if (threadgroup) { - threadgroup_fork_write_lock(tsk); + threadgroup_lock(tsk); ret = cgroup_attach_proc(cgrp, tsk); - threadgroup_fork_write_unlock(tsk); + threadgroup_unlock(tsk); } else { ret = cgroup_attach_task(cgrp, tsk); } |