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authorTejun Heo <tj@kernel.org>2013-08-08 20:11:24 -0400
committerTejun Heo <tj@kernel.org>2013-08-08 20:11:24 -0400
commit182446d087906de40e514573a92a97b203695f71 (patch)
tree6aee96219c82d0a64b9d389c50666c1ce0ec27ee /kernel/sched/cpuacct.c
parent67f4c36f83455b253445b2cb28ac9a2c4f85d99a (diff)
downloadlinux-182446d087906de40e514573a92a97b203695f71.tar.bz2
cgroup: pass around cgroup_subsys_state instead of cgroup in file methods
cgroup is currently in the process of transitioning to using struct cgroup_subsys_state * as the primary handle instead of struct cgroup. Please see the previous commit which converts the subsystem methods for rationale. This patch converts all cftype file operations to take @css instead of @cgroup. cftypes for the cgroup core files don't have their subsytem pointer set. These will automatically use the dummy_css added by the previous patch and can be converted the same way. Most subsystem conversions are straight forwards but there are some interesting ones. * freezer: update_if_frozen() is also converted to take @css instead of @cgroup for consistency. This will make the code look simpler too once iterators are converted to use css. * memory/vmpressure: mem_cgroup_from_css() needs to be exported to vmpressure while mem_cgroup_from_cont() can be made static. Updated accordingly. * cpu: cgroup_tg() doesn't have any user left. Removed. * cpuacct: cgroup_ca() doesn't have any user left. Removed. * hugetlb: hugetlb_cgroup_form_cgroup() doesn't have any user left. Removed. * net_cls: cgrp_cls_state() doesn't have any user left. Removed. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Aristeu Rozanski <aris@redhat.com> Acked-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Balbir Singh <bsingharora@gmail.com> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/sched/cpuacct.c')
-rw-r--r--kernel/sched/cpuacct.c28
1 files changed, 11 insertions, 17 deletions
diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c
index 1b784d9b3630..f64722ff0299 100644
--- a/kernel/sched/cpuacct.c
+++ b/kernel/sched/cpuacct.c
@@ -38,12 +38,6 @@ static inline struct cpuacct *css_ca(struct cgroup_subsys_state *css)
return css ? container_of(css, struct cpuacct, css) : NULL;
}
-/* return cpu accounting group corresponding to this container */
-static inline struct cpuacct *cgroup_ca(struct cgroup *cgrp)
-{
- return css_ca(cgroup_css(cgrp, cpuacct_subsys_id));
-}
-
/* return cpu accounting group to which this task belongs */
static inline struct cpuacct *task_ca(struct task_struct *tsk)
{
@@ -138,9 +132,9 @@ static void cpuacct_cpuusage_write(struct cpuacct *ca, int cpu, u64 val)
}
/* return total cpu usage (in nanoseconds) of a group */
-static u64 cpuusage_read(struct cgroup *cgrp, struct cftype *cft)
+static u64 cpuusage_read(struct cgroup_subsys_state *css, struct cftype *cft)
{
- struct cpuacct *ca = cgroup_ca(cgrp);
+ struct cpuacct *ca = css_ca(css);
u64 totalcpuusage = 0;
int i;
@@ -150,10 +144,10 @@ static u64 cpuusage_read(struct cgroup *cgrp, struct cftype *cft)
return totalcpuusage;
}
-static int cpuusage_write(struct cgroup *cgrp, struct cftype *cftype,
- u64 reset)
+static int cpuusage_write(struct cgroup_subsys_state *css, struct cftype *cft,
+ u64 reset)
{
- struct cpuacct *ca = cgroup_ca(cgrp);
+ struct cpuacct *ca = css_ca(css);
int err = 0;
int i;
@@ -169,10 +163,10 @@ out:
return err;
}
-static int cpuacct_percpu_seq_read(struct cgroup *cgroup, struct cftype *cft,
- struct seq_file *m)
+static int cpuacct_percpu_seq_read(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *m)
{
- struct cpuacct *ca = cgroup_ca(cgroup);
+ struct cpuacct *ca = css_ca(css);
u64 percpu;
int i;
@@ -189,10 +183,10 @@ static const char * const cpuacct_stat_desc[] = {
[CPUACCT_STAT_SYSTEM] = "system",
};
-static int cpuacct_stats_show(struct cgroup *cgrp, struct cftype *cft,
- struct cgroup_map_cb *cb)
+static int cpuacct_stats_show(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct cgroup_map_cb *cb)
{
- struct cpuacct *ca = cgroup_ca(cgrp);
+ struct cpuacct *ca = css_ca(css);
int cpu;
s64 val = 0;