[PATCH 1/1] LoongArch: Introduce the numa_memblks conversion

[Yuquan Wang]

"mm: introduce numa_memblks"(87482708210f) has moved numa_memblks
from x86 to the generic code, but loongarch was left out of this
conversion.

This patch introduces the generic numa_memblks.

Signed-off-by: Yuquan Wang <wangyuquan1236@xxxxxxxxxxxxxx>
---

Background
----------
I am managed to land the patch[1] "mm: numa_memblks: introduce numa_add_reserved_memblk"
but kernel test CI noticed build errors[2] from loongarch64-linux-gcc.

Link:
[1]: https://lore.kernel.org/all/20250409040121.3212489-1-wangyuquan1236@xxxxxxxxxxxxxx/
[2]: https://lore.kernel.org/all/202503282026.QNaOAK79-lkp@xxxxxxxxx/

 arch/loongarch/Kconfig            |  1 +
 arch/loongarch/include/asm/numa.h | 14 ----------
 arch/loongarch/kernel/numa.c      | 43 +------------------------------
 3 files changed, 2 insertions(+), 56 deletions(-)

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 067c0b994648..5906ccd06705 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -186,6 +186,7 @@ config LOONGARCH
 	select MODULES_USE_ELF_RELA if MODULES
 	select NEED_PER_CPU_EMBED_FIRST_CHUNK
 	select NEED_PER_CPU_PAGE_FIRST_CHUNK
+	select NUMA_MEMBLKS
 	select OF
 	select OF_EARLY_FLATTREE
 	select PCI
diff --git a/arch/loongarch/include/asm/numa.h b/arch/loongarch/include/asm/numa.h
index b5f9de9f102e..bbf9f70bd25f 100644
--- a/arch/loongarch/include/asm/numa.h
+++ b/arch/loongarch/include/asm/numa.h
@@ -22,20 +22,6 @@ extern int numa_off;
 extern s16 __cpuid_to_node[CONFIG_NR_CPUS];
 extern nodemask_t numa_nodes_parsed __initdata;
 
-struct numa_memblk {
-	u64			start;
-	u64			end;
-	int			nid;
-};
-
-#define NR_NODE_MEMBLKS		(MAX_NUMNODES*2)
-struct numa_meminfo {
-	int			nr_blks;
-	struct numa_memblk	blk[NR_NODE_MEMBLKS];
-};
-
-extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
-
 extern void __init early_numa_add_cpu(int cpuid, s16 node);
 extern void numa_add_cpu(unsigned int cpu);
 extern void numa_remove_cpu(unsigned int cpu);
diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c
index 30a72fd528c0..0ed384635566 100644
--- a/arch/loongarch/kernel/numa.c
+++ b/arch/loongarch/kernel/numa.c
@@ -18,6 +18,7 @@
 #include <linux/efi.h>
 #include <linux/irq.h>
 #include <linux/pci.h>
+#include <linux/numa_memblks.h>
 #include <asm/bootinfo.h>
 #include <asm/loongson.h>
 #include <asm/numa.h>
@@ -145,48 +146,6 @@ void numa_remove_cpu(unsigned int cpu)
 	cpumask_clear_cpu(cpu, &cpus_on_node[nid]);
 }
 
-static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
-				     struct numa_meminfo *mi)
-{
-	/* ignore zero length blks */
-	if (start == end)
-		return 0;
-
-	/* whine about and ignore invalid blks */
-	if (start > end || nid < 0 || nid >= MAX_NUMNODES) {
-		pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
-			   nid, start, end - 1);
-		return 0;
-	}
-
-	if (mi->nr_blks >= NR_NODE_MEMBLKS) {
-		pr_err("NUMA: too many memblk ranges\n");
-		return -EINVAL;
-	}
-
-	mi->blk[mi->nr_blks].start = PFN_ALIGN(start);
-	mi->blk[mi->nr_blks].end = PFN_ALIGN(end - PAGE_SIZE + 1);
-	mi->blk[mi->nr_blks].nid = nid;
-	mi->nr_blks++;
-	return 0;
-}
-
-/**
- * numa_add_memblk - Add one numa_memblk to numa_meminfo
- * @nid: NUMA node ID of the new memblk
- * @start: Start address of the new memblk
- * @end: End address of the new memblk
- *
- * Add a new memblk to the default numa_meminfo.
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int __init numa_add_memblk(int nid, u64 start, u64 end)
-{
-	return numa_add_memblk_to(nid, start, end, &numa_meminfo);
-}
-
 static void __init node_mem_init(unsigned int node)
 {
 	unsigned long start_pfn, end_pfn;
-- 
2.34.1