summaryrefslogtreecommitdiff
path: root/net/core
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2014-02-08 10:36:58 -0500
committerTejun Heo <tj@kernel.org>2014-02-08 10:36:58 -0500
commit073219e995b4a3f8cf1ce8228b7ef440b6994ac0 (patch)
treed140fc2e94bd8fd09270286b7267fb087a79f288 /net/core
parent3ed80a62bf959d34ebd4d553b026fbe7e6fbcc54 (diff)
cgroup: clean up cgroup_subsys names and initialization
cgroup_subsys is a bit messier than it needs to be. * The name of a subsys can be different from its internal identifier defined in cgroup_subsys.h. Most subsystems use the matching name but three - cpu, memory and perf_event - use different ones. * cgroup_subsys_id enums are postfixed with _subsys_id and each cgroup_subsys is postfixed with _subsys. cgroup.h is widely included throughout various subsystems, it doesn't and shouldn't have claim on such generic names which don't have any qualifier indicating that they belong to cgroup. * cgroup_subsys->subsys_id should always equal the matching cgroup_subsys_id enum; however, we require each controller to initialize it and then BUG if they don't match, which is a bit silly. This patch cleans up cgroup_subsys names and initialization by doing the followings. * cgroup_subsys_id enums are now postfixed with _cgrp_id, and each cgroup_subsys with _cgrp_subsys. * With the above, renaming subsys identifiers to match the userland visible names doesn't cause any naming conflicts. All non-matching identifiers are renamed to match the official names. cpu_cgroup -> cpu mem_cgroup -> memory perf -> perf_event * controllers no longer need to initialize ->subsys_id and ->name. They're generated in cgroup core and set automatically during boot. * Redundant cgroup_subsys declarations removed. * While updating BUG_ON()s in cgroup_init_early(), convert them to WARN()s. BUGging that early during boot is stupid - the kernel can't print anything, even through serial console and the trap handler doesn't even link stack frame properly for back-tracing. This patch doesn't introduce any behavior changes. v2: Rebased on top of fe1217c4f3f7 ("net: net_cls: move cgroupfs classid handling into core"). Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: "David S. Miller" <davem@davemloft.net> Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Aristeu Rozanski <aris@redhat.com> Acked-by: Ingo Molnar <mingo@redhat.com> Acked-by: Li Zefan <lizefan@huawei.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Balbir Singh <bsingharora@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Serge E. Hallyn <serue@us.ibm.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Thomas Graf <tgraf@suug.ch>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/netclassid_cgroup.c6
-rw-r--r--net/core/netprio_cgroup.c4
2 files changed, 3 insertions, 7 deletions
diff --git a/net/core/netclassid_cgroup.c b/net/core/netclassid_cgroup.c
index 9e5ad5d74e60..b865662fba71 100644
--- a/net/core/netclassid_cgroup.c
+++ b/net/core/netclassid_cgroup.c
@@ -23,7 +23,7 @@ static inline struct cgroup_cls_state *css_cls_state(struct cgroup_subsys_state
struct cgroup_cls_state *task_cls_state(struct task_struct *p)
{
- return css_cls_state(task_css(p, net_cls_subsys_id));
+ return css_cls_state(task_css(p, net_cls_cgrp_id));
}
EXPORT_SYMBOL_GPL(task_cls_state);
@@ -102,12 +102,10 @@ static struct cftype ss_files[] = {
{ } /* terminate */
};
-struct cgroup_subsys net_cls_subsys = {
- .name = "net_cls",
+struct cgroup_subsys net_cls_cgrp_subsys = {
.css_alloc = cgrp_css_alloc,
.css_online = cgrp_css_online,
.css_free = cgrp_css_free,
.attach = cgrp_attach,
- .subsys_id = net_cls_subsys_id,
.base_cftypes = ss_files,
};
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 857e1603f9b7..d7d23e28fafd 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -244,13 +244,11 @@ static struct cftype ss_files[] = {
{ } /* terminate */
};
-struct cgroup_subsys net_prio_subsys = {
- .name = "net_prio",
+struct cgroup_subsys net_prio_cgrp_subsys = {
.css_alloc = cgrp_css_alloc,
.css_online = cgrp_css_online,
.css_free = cgrp_css_free,
.attach = net_prio_attach,
- .subsys_id = net_prio_subsys_id,
.base_cftypes = ss_files,
};