cgroup, sched: convert away from cftype->read_map()

In preparation of conversion to kernfs, cgroup file handling is being
consolidated so that it can be easily mapped to the seq_file based
interface of kernfs.

cftype->read_map() doesn't add any value and being replaced with
->read_seq_string().  Update cpu_stats_show() and cpuacct_stats_show()
accordingly.

This patch doesn't make any visible behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index c1808606ee5f..f28ec6722f0b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7257,14 +7257,14 @@ static int __cfs_schedulable(struct task_group *tg, u64 period, u64 quota)
 }
 
 static int cpu_stats_show(struct cgroup_subsys_state *css, struct cftype *cft,
-                struct cgroup_map_cb *cb)
+                          struct seq_file *sf)
 {
         struct task_group *tg = css_tg(css);
         struct cfs_bandwidth *cfs_b = &tg->cfs_bandwidth;
 
-        cb->fill(cb, "nr_periods", cfs_b->nr_periods);
-        cb->fill(cb, "nr_throttled", cfs_b->nr_throttled);
-        cb->fill(cb, "throttled_time", cfs_b->throttled_time);
+        seq_printf(sf, "nr_periods %d\n", cfs_b->nr_periods);
+        seq_printf(sf, "nr_throttled %d\n", cfs_b->nr_throttled);
+        seq_printf(sf, "throttled_time %llu\n", cfs_b->throttled_time);
 
         return 0;
 }
@@ -7318,7 +7318,7 @@ static struct cftype cpu_files[] = {
         },
         {
                 .name = "stat",
-                .read_map = cpu_stats_show,
+                .read_seq_string = cpu_stats_show,
         },
 #endif
 #ifdef CONFIG_RT_GROUP_SCHED