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cgroup: stash cgroup_root reference into cgroup_fs_context

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Note that this reference is *NOT* contributing to refcount of
cgroup_root in question and is valid only until cgroup_do_mount()
returns.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2019-01-17 02:25:51 -05:00
parent e34a98d5b2
commit cf6299b1d0
3 changed files with 10 additions and 4 deletions
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3
kernel/cgroup/cgroup-internal.h
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@@ -41,6 +41,7 @@ extern void __init enable_debug_cgroup(void);
* The cgroup filesystem superblock creation/mount context.
*/
struct cgroup_fs_context {
struct cgroup_root *root;
unsigned int flags; /* CGRP_ROOT_* flags */
/* cgroup1 bits */
@@ -208,7 +209,7 @@ int cgroup_path_ns_locked(struct cgroup *cgrp, char *buf, size_t buflen,
struct cgroup_namespace *ns);
void cgroup_free_root(struct cgroup_root *root);
void init_cgroup_root(struct cgroup_root *root, struct cgroup_fs_context *ctx);
void init_cgroup_root(struct cgroup_fs_context *ctx);
int cgroup_setup_root(struct cgroup_root *root, u16 ss_mask);
int rebind_subsystems(struct cgroup_root *dst_root, u16 ss_mask);
struct dentry *cgroup_do_mount(struct file_system_type *fs_type, int flags,