# \[PATCH v2 11/69\] mm/sparse: Move sparse\_vmemmap\_init\_nid\_late() into sparse\_init\_nid()

- From: Muchun Song \<hidden\>
- Date: 2026-05-13 13:08:34 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2026/05/9003586
- Thread: https://ratatoskr.run/linux-mm/2026/05/9003574/t.md

```text
sparse_vmemmap_init_nid_late() is still called separately from
mm_core_init_early(), away from the rest of the sparse initialization
path.

Now that sparse_init() runs after zone initialization, call
sparse_vmemmap_init_nid_late() from sparse_init_nid() instead. This
keeps both sparse_vmemmap_init_nid_early() and
sparse_vmemmap_init_nid_late() in the sparse setup path.

Signed-off-by: Muchun Song <redacted>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
---
v1->v2:
- Add Reviewed-by from Mike Rapoport
---
 mm/mm_init.c | 4 ----
 mm/sparse.c  | 1 +
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/mm/mm_init.c b/mm/mm_init.c
index 6646d4b47796..165b83c9a9c3 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2686,16 +2686,12 @@ void __init __weak mem_init(void)
 
 void __init mm_core_init_early(void)
 {
-	int nid;
-
 	free_area_init();
 
 	hugetlb_cma_reserve();
 	hugetlb_bootmem_alloc();
 
 	sparse_init();
-	for_each_node_state(nid, N_MEMORY)
-		sparse_vmemmap_init_nid_late(nid);
 	memmap_init();
 }
 
diff --git a/mm/sparse.c b/mm/sparse.c
index 324213d8bdcb..3917a47153d8 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -320,6 +320,7 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin,
 		}
 	}
 	sparse_usage_fini();
+	sparse_vmemmap_init_nid_late(nid);
 }
 
 /*
-- 
2.54.0


```