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Revert "cgroup: add cgroup_subsys->css_e_css_changed()"
This reverts commit 56c807ba4e
.
cgroup_subsys->css_e_css_changed() was supposed to be used by cgroup
writeback support; however, the change to per-inode cgroup association
made it unnecessary and the callback doesn't have any user. Remove
it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
This commit is contained in:
parent
b598dde354
commit
5eb385cc5a
2 changed files with 0 additions and 19 deletions
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@ -434,7 +434,6 @@ struct cgroup_subsys {
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void (*css_released)(struct cgroup_subsys_state *css);
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void (*css_free)(struct cgroup_subsys_state *css);
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void (*css_reset)(struct cgroup_subsys_state *css);
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void (*css_e_css_changed)(struct cgroup_subsys_state *css);
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int (*can_attach)(struct cgroup_taskset *tset);
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void (*cancel_attach)(struct cgroup_taskset *tset);
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@ -3127,24 +3127,6 @@ static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of,
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}
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}
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/*
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* The effective csses of all the descendants (excluding @cgrp) may
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* have changed. Subsystems can optionally subscribe to this event
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* by implementing ->css_e_css_changed() which is invoked if any of
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* the effective csses seen from the css's cgroup may have changed.
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*/
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for_each_subsys(ss, ssid) {
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struct cgroup_subsys_state *this_css = cgroup_css(cgrp, ss);
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struct cgroup_subsys_state *css;
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if (!ss->css_e_css_changed || !this_css)
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continue;
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css_for_each_descendant_pre(css, this_css)
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if (css != this_css)
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ss->css_e_css_changed(css);
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}
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kernfs_activate(cgrp->kn);
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ret = 0;
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out_unlock:
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