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smpboot: introduce SDTL_INIT() helper to tidy sched topology setup

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Define a small SDTL_INIT(maskfn, flagsfn, name) macro and use it to build the
sched_domain_topology_level array. Purely a cleanup; behaviour is unchanged.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lore.kernel.org/r/20250710105715.66594-2-me@linux.beauty
This commit is contained in:
Li Chen
2025-07-14 10:59:34 +02:00
committed by Peter Zijlstra
parent 634c24068a
commit e075f43609
5 changed files with 31 additions and 53 deletions
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kernel/sched/topology.c
+8 -16
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@@ -1737,17 +1737,17 @@ sd_init(struct sched_domain_topology_level *tl,
*/
static struct sched_domain_topology_level default_topology[] = {
#ifdef CONFIG_SCHED_SMT
{ cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
SDTL_INIT(cpu_smt_mask, cpu_smt_flags, SMT),
#endif
#ifdef CONFIG_SCHED_CLUSTER
{ cpu_clustergroup_mask, cpu_cluster_flags, SD_INIT_NAME(CLS) },
SDTL_INIT(cpu_clustergroup_mask, cpu_cluster_flags, CLS),
#endif
#ifdef CONFIG_SCHED_MC
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
SDTL_INIT(cpu_coregroup_mask, cpu_core_flags, MC),
#endif
{ cpu_cpu_mask, SD_INIT_NAME(PKG) },
SDTL_INIT(cpu_cpu_mask, NULL, PKG),
{ NULL, },
};
@@ -2008,23 +2008,15 @@ void sched_init_numa(int offline_node)
/*
* Add the NUMA identity distance, aka single NODE.
*/
tl[i++] = (struct sched_domain_topology_level){
.mask = sd_numa_mask,
.numa_level = 0,
SD_INIT_NAME(NODE)
};
tl[i++] = SDTL_INIT(sd_numa_mask, NULL, NODE);
/*
* .. and append 'j' levels of NUMA goodness.
*/
for (j = 1; j < nr_levels; i++, j++) {
tl[i] = (struct sched_domain_topology_level){
.mask = sd_numa_mask,
.sd_flags = cpu_numa_flags,
.flags = SDTL_OVERLAP,
.numa_level = j,
SD_INIT_NAME(NUMA)
};
tl[i] = SDTL_INIT(sd_numa_mask, cpu_numa_flags, NUMA);
tl[i].numa_level = j;
tl[i].flags = SDTL_OVERLAP;
}
sched_domain_topology_saved = sched_domain_topology;