cgroup: make debug an implicit controller on cgroup2 (8cc38fa7) · Commits · e / devices / android_kernel_oneplus_sm7250

kernel/cgroup/debug.c

+56 −3

Original line number	Diff line number	Diff line
		@@ -240,7 +240,7 @@ static u64 releasable_read(struct cgroup_subsys_state css, struct cftype cft)
		!css_has_online_children(&css->cgroup->self));
		}

		static struct cftype debug_files[] = {
		static struct cftype debug_legacy_files[] = {
		{
		.name = "taskcount",
		.read_u64 = debug_taskcount_read,
		@@ -287,9 +287,62 @@ static struct cftype debug_files[] = {
		{ } /* terminate */
		};

		static struct cftype debug_files[] = {
		{
		.name = "taskcount",
		.read_u64 = debug_taskcount_read,
		},

		{
		.name = "current_css_set",
		.seq_show = current_css_set_read,
		.flags = CFTYPE_ONLY_ON_ROOT,
		},

		{
		.name = "current_css_set_refcount",
		.read_u64 = current_css_set_refcount_read,
		.flags = CFTYPE_ONLY_ON_ROOT,
		},

		{
		.name = "current_css_set_cg_links",
		.seq_show = current_css_set_cg_links_read,
		.flags = CFTYPE_ONLY_ON_ROOT,
		},

		{
		.name = "css_links",
		.seq_show = cgroup_css_links_read,
		},

		{
		.name = "csses",
		.seq_show = cgroup_subsys_states_read,
		},

		{
		.name = "masks",
		.seq_show = cgroup_masks_read,
		},

		{ } /* terminate */
		};

		struct cgroup_subsys debug_cgrp_subsys = {
		.css_alloc = debug_css_alloc,
		.css_free = debug_css_free,
		.legacy_cftypes = debug_files,
		.dfl_cftypes = debug_files,
		.legacy_cftypes = debug_legacy_files,
		};

		/*
		* On v2, debug is an implicit controller enabled by "cgroup_debug" boot
		* parameter.
		*/
		static int __init enable_cgroup_debug(char *str)
		{
		debug_cgrp_subsys.dfl_cftypes = debug_files;
		debug_cgrp_subsys.implicit_on_dfl = true;
		return 1;
		}
		__setup("cgroup_debug", enable_cgroup_debug);