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sched/tune: use a single initialisation function

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With the introduction of initialization function required to compute the
energy normalization constants from DTB at boot time, we have now a
late_initcall which is already used by SchedTune.

This patch consolidate within that function the other initialization
bits which was previously deferred to the first CGroup creation.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
[jstultz: fwdported to 4.4]
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Patrick Bellasi 2016-07-29 15:19:41 +01:00 • committed by John Stultz
parent 274bbcfbe4
commit 7f8f24a0ea
1 changed files with 26 additions and 24 deletions
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50
kernel/sched/tune.c
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@ -410,8 +410,6 @@ boost_write(struct cgroup_subsys_state *css, struct cftype *cft,
s64 boost)
{
struct schedtune *st = css_st(css);
unsigned threshold_idx;
int boost_pct;
if (boost < -100 || boost > 100)
return -EINVAL;
@ -456,33 +454,14 @@ schedtune_boostgroup_init(struct schedtune *st)
return 0;
}
static int
schedtune_init(void)
{
struct boost_groups *bg;
int cpu;
/* Initialize the per CPU boost groups */
for_each_possible_cpu(cpu) {
bg = &per_cpu(cpu_boost_groups, cpu);
memset(bg, 0, sizeof(struct boost_groups));
}
pr_info(" schedtune configured to support %d boost groups\n",
BOOSTGROUPS_COUNT);
return 0;
}
static struct cgroup_subsys_state *
schedtune_css_alloc(struct cgroup_subsys_state *parent_css)
{
struct schedtune *st;
int idx;
if (!parent_css) {
schedtune_init();
if (!parent_css)
return &root_schedtune.css;
}
/* Allow only single level hierachies */
if (parent_css != &root_schedtune.css) {
@ -543,6 +522,22 @@ struct cgroup_subsys schedtune_cgrp_subsys = {
.early_init = 1,
};
static inline void
schedtune_init_cgroups(void)
{
struct boost_groups *bg;
int cpu;
/* Initialize the per CPU boost groups */
for_each_possible_cpu(cpu) {
bg = &per_cpu(cpu_boost_groups, cpu);
memset(bg, 0, sizeof(struct boost_groups));
}
pr_info("schedtune: configured to support %d boost groups\n",
BOOSTGROUPS_COUNT);
}
#else /* CONFIG_CGROUP_SCHEDTUNE */
int
@ -690,7 +685,7 @@ schedtune_add_cluster_nrg(
* that bind the EM to the topology information.
*/
static int
schedtune_init_late(void)
schedtune_init(void)
{
struct target_nrg *ste = &schedtune_target_nrg;
unsigned long delta_pwr = 0;
@ -730,10 +725,17 @@ schedtune_init_late(void)
ste->rdiv.m, ste->rdiv.sh1, ste->rdiv.sh2);
schedtune_test_nrg(delta_pwr);
#ifdef CONFIG_CGROUP_SCHEDTUNE
schedtune_init_cgroups();
#else
pr_info("schedtune: configured to support global boosting only\n");
#endif
return 0;
nodata:
rcu_read_unlock();
return -EINVAL;
}
late_initcall(schedtune_init_late);
late_initcall(schedtune_init);