diff options
| -rw-r--r-- | kernel/cgroup.c | 31 |
1 files changed, 15 insertions, 16 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index f09bab1cf275..a4ff4965e53b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1366,6 +1366,7 @@ err: static int rebind_subsystems(struct cgroup_root *dst_root, unsigned long ss_mask) { + struct cgroup *dcgrp = &dst_root->cgrp; struct cgroup_subsys *ss; unsigned long tmp_ss_mask; int ssid, i, ret; @@ -1387,7 +1388,7 @@ static int rebind_subsystems(struct cgroup_root *dst_root, if (dst_root == &cgrp_dfl_root) tmp_ss_mask &= ~cgrp_dfl_root_inhibit_ss_mask; - ret = cgroup_populate_dir(&dst_root->cgrp, tmp_ss_mask); + ret = cgroup_populate_dir(dcgrp, tmp_ss_mask); if (ret) { if (dst_root != &cgrp_dfl_root) return ret; @@ -1413,37 +1414,35 @@ static int rebind_subsystems(struct cgroup_root *dst_root, cgroup_clear_dir(&ss->root->cgrp, 1 << ssid); for_each_subsys_which(ss, ssid, &ss_mask) { - struct cgroup_root *src_root; - struct cgroup_subsys_state *css; + struct cgroup_root *src_root = ss->root; + struct cgroup *scgrp = &src_root->cgrp; + struct cgroup_subsys_state *css = cgroup_css(scgrp, ss); struct css_set *cset; - src_root = ss->root; - css = cgroup_css(&src_root->cgrp, ss); - - WARN_ON(!css || cgroup_css(&dst_root->cgrp, ss)); + WARN_ON(!css || cgroup_css(dcgrp, ss)); - RCU_INIT_POINTER(src_root->cgrp.subsys[ssid], NULL); - rcu_assign_pointer(dst_root->cgrp.subsys[ssid], css); + RCU_INIT_POINTER(scgrp->subsys[ssid], NULL); + rcu_assign_pointer(dcgrp->subsys[ssid], css); ss->root = dst_root; - css->cgroup = &dst_root->cgrp; + css->cgroup = dcgrp; down_write(&css_set_rwsem); hash_for_each(css_set_table, i, cset, hlist) list_move_tail(&cset->e_cset_node[ss->id], - &dst_root->cgrp.e_csets[ss->id]); + &dcgrp->e_csets[ss->id]); up_write(&css_set_rwsem); src_root->subsys_mask &= ~(1 << ssid); - src_root->cgrp.subtree_control &= ~(1 << ssid); - cgroup_refresh_child_subsys_mask(&src_root->cgrp); + scgrp->subtree_control &= ~(1 << ssid); + cgroup_refresh_child_subsys_mask(scgrp); /* default hierarchy doesn't enable controllers by default */ dst_root->subsys_mask |= 1 << ssid; if (dst_root == &cgrp_dfl_root) { static_branch_enable(cgroup_subsys_on_dfl_key[ssid]); } else { - dst_root->cgrp.subtree_control |= 1 << ssid; - cgroup_refresh_child_subsys_mask(&dst_root->cgrp); + dcgrp->subtree_control |= 1 << ssid; + cgroup_refresh_child_subsys_mask(dcgrp); static_branch_disable(cgroup_subsys_on_dfl_key[ssid]); } @@ -1451,7 +1450,7 @@ static int rebind_subsystems(struct cgroup_root *dst_root, ss->bind(css); } - kernfs_activate(dst_root->cgrp.kn); + kernfs_activate(dcgrp->kn); return 0; } |