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Subject[PATCH 1/3] sched/fair: Remove sched_trace_*() helper functions
Date
The sched_trace_*() helper functions provide access to data of
internal scheduler structures, like struct rq. They support built-in
or kernel module builds outside kernel/sched/. But they don't have to
be maintained in the scheduler code.

kernel/sched/ is the natural place for a tp-2-te converter to get
access to data of internal scheduler structures.

In case a kernel module has to be build out-of tree there is an easy
way to make kernel/sched/sched.h visible.

CFLAGS_foo.o := -I$KERNEL_SRC/kernel/sched

all:
make -C $KERNEL_SRC M=$(PWD) modules

The sched_trace_*() helper functions can be coded in a tp-2-te converter.

Remove them from kernel/sched/fair.c.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
---
include/linux/sched.h | 13 -------
kernel/sched/fair.c | 86 -------------------------------------------
2 files changed, 99 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 2bf0af19a62a..23415088967d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2035,17 +2035,4 @@ static inline void rseq_syscall(struct pt_regs *regs)

#endif

-const struct sched_avg *sched_trace_cfs_rq_avg(struct cfs_rq *cfs_rq);
-char *sched_trace_cfs_rq_path(struct cfs_rq *cfs_rq, char *str, int len);
-int sched_trace_cfs_rq_cpu(struct cfs_rq *cfs_rq);
-
-const struct sched_avg *sched_trace_rq_avg_rt(struct rq *rq);
-const struct sched_avg *sched_trace_rq_avg_dl(struct rq *rq);
-const struct sched_avg *sched_trace_rq_avg_irq(struct rq *rq);
-
-int sched_trace_rq_cpu(struct rq *rq);
-int sched_trace_rq_nr_running(struct rq *rq);
-
-const struct cpumask *sched_trace_rd_span(struct root_domain *rd);
-
#endif
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 33699db27ed5..f7640af1dcaa 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -11236,89 +11236,3 @@ __init void init_sched_fair_class(void)
#endif /* SMP */

}
-
-/*
- * Helper functions to facilitate extracting info from tracepoints.
- */
-
-const struct sched_avg *sched_trace_cfs_rq_avg(struct cfs_rq *cfs_rq)
-{
-#ifdef CONFIG_SMP
- return cfs_rq ? &cfs_rq->avg : NULL;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL_GPL(sched_trace_cfs_rq_avg);
-
-char *sched_trace_cfs_rq_path(struct cfs_rq *cfs_rq, char *str, int len)
-{
- if (!cfs_rq) {
- if (str)
- strlcpy(str, "(null)", len);
- else
- return NULL;
- }
-
- cfs_rq_tg_path(cfs_rq, str, len);
- return str;
-}
-EXPORT_SYMBOL_GPL(sched_trace_cfs_rq_path);
-
-int sched_trace_cfs_rq_cpu(struct cfs_rq *cfs_rq)
-{
- return cfs_rq ? cpu_of(rq_of(cfs_rq)) : -1;
-}
-EXPORT_SYMBOL_GPL(sched_trace_cfs_rq_cpu);
-
-const struct sched_avg *sched_trace_rq_avg_rt(struct rq *rq)
-{
-#ifdef CONFIG_SMP
- return rq ? &rq->avg_rt : NULL;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL_GPL(sched_trace_rq_avg_rt);
-
-const struct sched_avg *sched_trace_rq_avg_dl(struct rq *rq)
-{
-#ifdef CONFIG_SMP
- return rq ? &rq->avg_dl : NULL;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL_GPL(sched_trace_rq_avg_dl);
-
-const struct sched_avg *sched_trace_rq_avg_irq(struct rq *rq)
-{
-#if defined(CONFIG_SMP) && defined(CONFIG_HAVE_SCHED_AVG_IRQ)
- return rq ? &rq->avg_irq : NULL;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL_GPL(sched_trace_rq_avg_irq);
-
-int sched_trace_rq_cpu(struct rq *rq)
-{
- return rq ? cpu_of(rq) : -1;
-}
-EXPORT_SYMBOL_GPL(sched_trace_rq_cpu);
-
-const struct cpumask *sched_trace_rd_span(struct root_domain *rd)
-{
-#ifdef CONFIG_SMP
- return rd ? rd->span : NULL;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL_GPL(sched_trace_rd_span);
-
-int sched_trace_rq_nr_running(struct rq *rq)
-{
- return rq ? rq->nr_running : -1;
-}
-EXPORT_SYMBOL_GPL(sched_trace_rq_nr_running);
--
2.17.1
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