The following commit has been merged into the sched/core branch of tip:
Commit-ID: d23b3bf8e43faa54a6839aafd6fedc15a3c4174f
Gitweb: https://git.kernel.org/tip/d23b3bf8e43faa54a6839aafd6fedc15a3c4174f
Author: Valentin Schneider <valentin.schneider@xxxxxxx>
AuthorDate: Mon, 17 Aug 2020 12:29:48 +01:00
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Wed, 19 Aug 2020 10:49:47 +02:00
ARM, sched/topology: Revert back to default scheduler topology
The ARM-specific GMC level is meant to be built using the thread sibling
mask, but no devicetree in arch/arm/boot/dts uses the 'thread' cpu-map
binding. With SD_SHARE_POWERDOMAIN gone, this topology level can be
removed, at which point ARM no longer benefits from having a custom defined
topology table.
Delete the GMC topology level by making ARM use the default scheduler
topology table. This essentially reverts commit:
fb2aa85564f4 ("sched, ARM: Create a dedicated scheduler topology table")
No change in functionality is expected.
Suggested-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: https://lore.kernel.org/r/20200817113003.20802-3-valentin.schneider@xxxxxxx
---
arch/arm/kernel/topology.c | 26 --------------------------
1 file changed, 26 deletions(-)
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 353f3ee..ef0058d 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -178,15 +178,6 @@ static inline void update_cpu_capacity(unsigned int cpuid) {}
#endif
/*
- * The current assumption is that we can power gate each core independently.
- * This will be superseded by DT binding once available.
- */
-const struct cpumask *cpu_corepower_mask(int cpu)
-{
- return &cpu_topology[cpu].thread_sibling;
-}
-
-/*
* store_cpu_topology is called at boot when only one cpu is running
* and with the mutex cpu_hotplug.lock locked, when several cpus have booted,
* which prevents simultaneous write access to cpu_topology array
@@ -241,20 +232,6 @@ topology_populated:
update_siblings_masks(cpuid);
}
-static inline int cpu_corepower_flags(void)
-{
- return SD_SHARE_PKG_RESOURCES;
-}
-
-static struct sched_domain_topology_level arm_topology[] = {
-#ifdef CONFIG_SCHED_MC
- { cpu_corepower_mask, cpu_corepower_flags, SD_INIT_NAME(GMC) },
- { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
-#endif
- { cpu_cpu_mask, SD_INIT_NAME(DIE) },
- { NULL, },
-};
-
/*
* init_cpu_topology is called at boot when only one cpu is running
* which prevent simultaneous write access to cpu_topology array
@@ -265,7 +242,4 @@ void __init init_cpu_topology(void)
smp_wmb();
parse_dt_topology();
-
- /* Set scheduler topology descriptor */
- set_sched_topology(arm_topology);
}
|