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LoongArch: Don't init & online empty nodes

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Don't init & online empty nodes without any CPU cores (and memory), in
this way "lscpu" will not display confusing empty nodes.

Modify fake_numa_init() to make sure at least Node-0 isn't empty for the
FDT booting case.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Huacai Chen 2026-10-27 22:51:23 +08:00
parent 9b56c3659a
commit 87c6d144bc
1 changed files with 6 additions and 2 deletions
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8
arch/loongarch/kernel/numa.c
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@ -216,6 +216,8 @@ static int __init fake_numa_init(void)
phys_addr_t start = memblock_start_of_DRAM();
phys_addr_t end = memblock_end_of_DRAM() - 1;
set_cpuid_to_node(0, 0);
early_numa_add_cpu(0, 0);
pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end);
return numa_add_memblk(0, start, end + 1);
@ -244,8 +246,10 @@ int __init init_numa_memory(void)
return -EINVAL;
for_each_node_mask(node, node_possible_map) {
node_mem_init(node);
node_set_online(node);
if (!cpumask_empty(&cpus_on_node[node])) {
node_mem_init(node);
node_set_online(node);
}
}
max_pfn = PFN_DOWN(memblock_end_of_DRAM());
max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);