From: John Garry <john.g.garry@oracle.com>
Date: Wed, 7 Jan 2026 09:40:06 +0000 (+0000)
Subject: MIPS: Loongson: Make cpumask_of_node() robust against NUMA_NO_NODE
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d55d3fe2d1470ac5b6e93efe7998b728013c9fc8;p=thirdparty%2Flinux.git

MIPS: Loongson: 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.

Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---

diff --git a/arch/mips/include/asm/mach-loongson64/topology.h b/arch/mips/include/asm/mach-loongson64/topology.h
index 3414a1fd17835..89bb4deab98a6 100644
--- a/arch/mips/include/asm/mach-loongson64/topology.h
+++ b/arch/mips/include/asm/mach-loongson64/topology.h
@@ -7,7 +7,7 @@
 #define cpu_to_node(cpu)	(cpu_logical_map(cpu) >> 2)
 
 extern cpumask_t __node_cpumask[];
-#define cpumask_of_node(node)	(&__node_cpumask[node])
+#define cpumask_of_node(node)	  ((node) == NUMA_NO_NODE ? cpu_all_mask : &__node_cpumask[node])
 
 struct pci_bus;
 extern int pcibus_to_node(struct pci_bus *);