[PATCH v3 2/2] mm, sparse: pass nid instead of pgdat to sparse_add_one_section()

[Wei Yang <richard.weiyang@xxxxxxxxx>]

Since the information needed in sparse_add_one_section() is node id to
allocate proper memory, it is not necessary to pass its pgdat.

This patch changes the prototype of sparse_add_one_section() to pass
node id directly. This is intended to reduce misleading that
sparse_add_one_section() would touch pgdat.

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
---
 include/linux/memory_hotplug.h | 2 +-
 mm/memory_hotplug.c            | 2 +-
 mm/sparse.c                    | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 45a5affcab8a..3787d4e913e6 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -333,7 +333,7 @@ extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
 		unsigned long nr_pages, struct vmem_altmap *altmap);
 extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
 extern bool is_memblock_offlined(struct memory_block *mem);
-extern int sparse_add_one_section(struct pglist_data *pgdat,
+extern int sparse_add_one_section(int nid,
 		unsigned long start_pfn, struct vmem_altmap *altmap);
 extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
 		unsigned long map_offset, struct vmem_altmap *altmap);
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index f626e7e5f57b..5b3a3d7b4466 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -253,7 +253,7 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
 	if (pfn_valid(phys_start_pfn))
 		return -EEXIST;
 
-	ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn, altmap);
+	ret = sparse_add_one_section(nid, phys_start_pfn, altmap);
 	if (ret < 0)
 		return ret;
 
diff --git a/mm/sparse.c b/mm/sparse.c
index 5825f276485f..2472bf23278a 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -662,7 +662,7 @@ static void free_map_bootmem(struct page *memmap)
  * set.  If this is <=0, then that means that the passed-in
  * map was not consumed and must be freed.
  */
-int __meminit sparse_add_one_section(struct pglist_data *pgdat,
+int __meminit sparse_add_one_section(int nid,
 		unsigned long start_pfn, struct vmem_altmap *altmap)
 {
 	unsigned long section_nr = pfn_to_section_nr(start_pfn);
@@ -675,11 +675,11 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat,
 	 * no locking for this, because it does its own
 	 * plus, it does a kmalloc
 	 */
-	ret = sparse_index_init(section_nr, pgdat->node_id);
+	ret = sparse_index_init(section_nr, nid);
 	if (ret < 0 && ret != -EEXIST)
 		return ret;
 	ret = 0;
-	memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, altmap);
+	memmap = kmalloc_section_memmap(section_nr, nid, altmap);
 	if (!memmap)
 		return -ENOMEM;
 	usemap = __kmalloc_section_usemap();
-- 
2.15.1