This reverts commit 56c807ba4e91f0980567b6a69de239677879b17f.
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 <t...@kernel.org>
---
include/linux/cgroup-defs.h | 1 -
kernel/cgroup.c | 18 ------------------
2 files changed, 19 deletions(-)
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 789471d..4f3c0da 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -434,7 +434,6 @@ struct cgroup_subsys {
void (*css_released)(struct cgroup_subsys_state *css);
void (*css_free)(struct cgroup_subsys_state *css);
void (*css_reset)(struct cgroup_subsys_state *css);
- void (*css_e_css_changed)(struct cgroup_subsys_state *css);
int (*can_attach)(struct cgroup_taskset *tset);
void (*cancel_attach)(struct cgroup_taskset *tset);
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 68b032d..7727b6e 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3127,24 +3127,6 @@ static ssize_t cgroup_subtree_control_write(struct
kernfs_open_file *of,
}
}
- /*
- * The effective csses of all the descendants (excluding @cgrp) may
- * have changed. Subsystems can optionally subscribe to this event
- * by implementing ->css_e_css_changed() which is invoked if any of
- * the effective csses seen from the css's cgroup may have changed.
- */
- for_each_subsys(ss, ssid) {
- struct cgroup_subsys_state *this_css = cgroup_css(cgrp, ss);
- struct cgroup_subsys_state *css;
-
- if (!ss->css_e_css_changed || !this_css)
- continue;
-
- css_for_each_descendant_pre(css, this_css)
- if (css != this_css)
- ss->css_e_css_changed(css);
- }
-
kernfs_activate(cgrp->kn);
ret = 0;
out_unlock:
--
2.5.0
