FAILED: Patch "LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE" failed to apply to 5.15-stable tree

Sasha Levin
2026-03-01T01:54:57Z

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 94b0c831eda778ae9e4f2164a8b3de485d8977bb Mon Sep 17 00:00:00 2001
From: John Garry <john.g.garry@oracle.com>
Date: Tue, 10 Feb 2026 19:31:12 +0800
Subject: [PATCH] LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE

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>
---
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