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authorTejun Heo <tj@kernel.org>2017-01-20 12:06:08 -0500
committerTejun Heo <tj@kernel.org>2017-01-30 17:09:07 -0500
commitb807421a720ff00bc31774d254f51313f4a7656b (patch)
tree17da361bdaa0625b594ebc4b3172fdf719a004bf /kernel
parentbdf3d06bedebd31539b68b4a744054f994ecc2e1 (diff)
downloadlinux-b807421a720ff00bc31774d254f51313f4a7656b.tar.gz
cgroup: misc cleanups
* cgrp_dfl_implicit_ss_mask is ulong instead of u16 unlike other ss_masks. Make it a u16. * Move have_canfork_callback together with other callback ss_masks. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/cgroup/cgroup.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 0dcc4c7..a99b15f 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -159,7 +159,7 @@ static bool cgrp_dfl_visible;
static u16 cgrp_dfl_inhibit_ss_mask;
/* some controllers are implicitly enabled on the default hierarchy */
-static unsigned long cgrp_dfl_implicit_ss_mask;
+static u16 cgrp_dfl_implicit_ss_mask;
/* The list of hierarchy roots */
LIST_HEAD(cgroup_roots);
@@ -178,13 +178,13 @@ static DEFINE_IDR(cgroup_hierarchy_idr);
static u64 css_serial_nr_next = 1;
/*
- * These bitmask flags indicate whether tasks in the fork and exit paths have
- * fork/exit handlers to call. This avoids us having to do extra work in the
- * fork/exit path to check which subsystems have fork/exit callbacks.
+ * These bitmasks identify subsystems with specific features to avoid
+ * having to do iterative checks repeatedly.
*/
static u16 have_fork_callback __read_mostly;
static u16 have_exit_callback __read_mostly;
static u16 have_free_callback __read_mostly;
+static u16 have_canfork_callback __read_mostly;
/* cgroup namespace for init task */
struct cgroup_namespace init_cgroup_ns = {
@@ -195,9 +195,6 @@ struct cgroup_namespace init_cgroup_ns = {
.root_cset = &init_css_set,
};
-/* Ditto for the can_fork callback. */
-static u16 have_canfork_callback __read_mostly;
-
static struct file_system_type cgroup2_fs_type;
static struct cftype cgroup_base_files[];