diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c
index a13f92593cfd..f7ffce170213 100644
--- a/arch/loongarch/kernel/numa.c
+++ b/arch/loongarch/kernel/numa.c
@@ -453,7 +453,7 @@ void __init paging_init(void)
 
 void __init mem_init(void)
 {
-	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
+	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
 	memblock_free_all();
 	setup_zero_pages();	/* This comes from node 0 */
 }