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devcgroup: make a helper to convert cgroup_subsys_state to devs_cgroup

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This is just picking the container_of out of cgroup_to_devcgroup into a
separate function.

This new css_to_devcgroup will be used in the 2nd patch.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: James Morris <jmorris@namei.org>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Emelyanov 2008-06-05 22:46:24 -07:00 committed by Linus Torvalds
parent 93b071139a
commit b66862f766
1 changed files with 6 additions and 2 deletions
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8
security/device_cgroup.c
View File

@ -49,10 +49,14 @@ struct dev_cgroup {
spinlock_t lock;
};
static inline struct dev_cgroup *css_to_devcgroup(struct cgroup_subsys_state *s)
{
return container_of(s, struct dev_cgroup, css);
}
static inline struct dev_cgroup *cgroup_to_devcgroup(struct cgroup *cgroup)
{
return container_of(cgroup_subsys_state(cgroup, devices_subsys_id),
struct dev_cgroup, css);
return css_to_devcgroup(cgroup_subsys_state(cgroup, devices_subsys_id));
}
struct cgroup_subsys devices_subsys;