cgroup_calc_subtree_ss

Name:group_calc_subtree_ss_mask - calculate subtree_ss_mask*@subtree_control: the new subtree_control mask to consider*@this_ss_mask: available subsystems* On the default hierarchy, a subsystem may request other subsystems to be

Proto:static u16 cgroup_calc_subtree_ss_mask(u16 subtree_control, u16 this_ss_mask)

Type:u16

Parameter:

Type	Parameter	Name
u16	subtree_control
u16	this_ss_mask

1520

cur_ss_mask = subtree_control

1524

lockdep_assert_held( & cgroup_mutex is the master lock)

1526

cur_ss_mask |= some controllers are implicitly enabled on the default hierarchy

1528

When (true) cycle

1529

new_ss_mask = cur_ss_mask

1531

__ss_mask = cur_ss_mask

1531

If Not CGROUP_SUBSYS_COUNT Then

1531

ssid = 0

1531

Break

1531

When ssid < CGROUP_SUBSYS_COUNT cycle

1531

ss = cgroup_subsys[ssid]

1532

new_ss_mask |= * A subsystem may depend on other subsystems. When such subsystem * is enabled on a cgroup, the depended-upon subsystems are enabled * together if available. Subsystems enabled due to dependency are * not visible to userland until explicitly enabled. The f

1533

When (false) cycle

1540

new_ss_mask &= this_ss_mask

1542

If new_ss_mask == cur_ss_mask Then Break

1544

cur_ss_mask = new_ss_mask

1547

Return cur_ss_mask

**Caller**
Name	Describe
cgroup_propagate_control	group_propagate_control - refresh control masks of a subtree@cgrp: root of the target subtree For @cgrp and its subtree, ensure ->subtree_ss_mask matches* ->subtree_control and propagate controller availability through the

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