block: remove ioc_*_changed()

[firefly-linux-kernel-4.4.55.git] / block / blk-cgroup.c

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 30e07308db24a79d19b8b26b12d64bf588dd19f2..a74019b67311c4bf730feb1c1060cffa5d3330fe 100644 (file)
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -47,8 +47,6 @@ static struct cgroup_subsys_state *blkiocg_create(struct cgroup_subsys *,
                                                  struct cgroup *);
 static int blkiocg_can_attach(struct cgroup_subsys *, struct cgroup *,
                              struct cgroup_taskset *);
-static void blkiocg_attach(struct cgroup_subsys *, struct cgroup *,
-                          struct cgroup_taskset *);
 static int blkiocg_pre_destroy(struct cgroup_subsys *, struct cgroup *);
 static void blkiocg_destroy(struct cgroup_subsys *, struct cgroup *);
 static int blkiocg_populate(struct cgroup_subsys *, struct cgroup *);
@@ -63,7 +61,6 @@ struct cgroup_subsys blkio_subsys = {
        .name = "blkio",
        .create = blkiocg_create,
        .can_attach = blkiocg_can_attach,
-       .attach = blkiocg_attach,
        .pre_destroy = blkiocg_pre_destroy,
        .destroy = blkiocg_destroy,
        .populate = blkiocg_populate,
@@ -1729,22 +1726,6 @@ static int blkiocg_can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
        return ret;
 }
 
-static void blkiocg_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
-                          struct cgroup_taskset *tset)
-{
-       struct task_struct *task;
-       struct io_context *ioc;
-
-       cgroup_taskset_for_each(task, cgrp, tset) {
-               /* we don't lose anything even if ioc allocation fails */
-               ioc = get_task_io_context(task, GFP_ATOMIC, NUMA_NO_NODE);
-               if (ioc) {
-                       ioc_cgroup_changed(ioc);
-                       put_io_context(ioc);
-               }
-       }
-}
-
 static void blkcg_bypass_start(void)
        __acquires(&all_q_mutex)
 {