diff options
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 1dda601ec337..cbbb46f783de 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2653,7 +2653,7 @@ static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of, loff_t off) { unsigned int enable = 0, disable = 0; - unsigned int css_enable, css_disable, old_ctrl, new_ctrl; + unsigned int css_enable, css_disable, old_sc, new_sc, old_ss, new_ss; struct cgroup *cgrp, *child; struct cgroup_subsys *ss; char *tok; @@ -2770,18 +2770,19 @@ static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of, * subsystems than specified may need to be enabled or disabled * depending on subsystem dependencies. */ - cgrp->subtree_control |= enable; - cgrp->subtree_control &= ~disable; + old_sc = cgrp->subtree_control; + old_ss = cgrp->child_subsys_mask; + new_sc = (old_sc | enable) & ~disable; + new_ss = cgroup_calc_child_subsys_mask(cgrp, new_sc); - old_ctrl = cgrp->child_subsys_mask; - cgroup_refresh_child_subsys_mask(cgrp); - new_ctrl = cgrp->child_subsys_mask; - - css_enable = ~old_ctrl & new_ctrl; - css_disable = old_ctrl & ~new_ctrl; + css_enable = ~old_ss & new_ss; + css_disable = old_ss & ~new_ss; enable |= css_enable; disable |= css_disable; + cgrp->subtree_control = new_sc; + cgrp->child_subsys_mask = new_ss; + /* * Create new csses or make the existing ones visible. A css is * created invisible if it's being implicitly enabled through @@ -2844,9 +2845,8 @@ out_unlock: return ret ?: nbytes; err_undo_css: - cgrp->subtree_control &= ~enable; - cgrp->subtree_control |= disable; - cgroup_refresh_child_subsys_mask(cgrp); + cgrp->subtree_control = old_sc; + cgrp->child_subsys_mask = old_ss; for_each_subsys(ss, ssid) { if (!(enable & (1 << ssid))) |