cgroup: drop CGRP_ROOT_SUBSYS_BOUND

Before kernfs conversion, due to the way super_block lookup works,
cgroup roots were created and made visible before being fully
initialized.  This in turn required a special flag to mark that the
root hasn't been fully initialized so that the destruction path can
tell fully bound ones from half initialized.

That flag is CGRP_ROOT_SUBSYS_BOUND and no longer necessary after the
kernfs conversion as the lookup and creation of new root are atomic
w.r.t. cgroup_mutex.  This patch removes the flag and passes the
requests subsystem mask to cgroup_setup_root() so that it can set the
respective mask bits as subsystems are bound.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

This commit is contained in:

Tejun Heo

2014-02-13 06:58:38 -05:00

parent d3ba07c3aa

commit 3558557305

2 changed files with 4 additions and 26 deletions

									
										include/linux/cgroup.h
									
		-2
	
												View File
												
				@@ -267,8 +267,6 @@ enum {

					/* mount options live below bit 16 */

					CGRP_ROOT_OPTION_MASK	= (1 << 16) - 1,

					CGRP_ROOT_SUBSYS_BOUND	= (1 << 16), /* subsystems finished binding */

				};

				/*