[PATCH 6.18 687/752] LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE

Sasha Levin
2026-02-28T17:58:23Z

From: John Garry <john.g.garry@oracle.com>

[ Upstream commit 94b0c831eda778ae9e4f2164a8b3de485d8977bb ]

The arch definition of cpumask_of_node() cannot handle NUMA_NO_NODE -
which is a valid index - so add a check for this.

Cc: stable@vger.kernel.org
Signed-off-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/loongarch/include/asm/topology.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/loongarch/include/asm/topology.h b/arch/loongarch/include/asm/topology.h
index f06e7ff25bb7c..6b79d6183085a 100644
--- a/arch/loongarch/include/asm/topology.h
+++ b/arch/loongarch/include/asm/topology.h
@@ -12,7 +12,7 @@

extern cpumask_t cpus_on_node[];

-#define cpumask_of_node(node) (&cpus_on_node[node])
+#define cpumask_of_node(node) ((node) == NUMA_NO_NODE ? cpu_all_mask : &cpus_on_node[node])

struct pci_bus;
extern int pcibus_to_node(struct pci_bus *);
--
2.51.0