[PATCH v4 17/19] mm/sparse-vmemmap: Remove sparse_vmemmap_init_nid_late()

[Muchun Song <songmuchun@bytedance.com>]

hugetlb_vmemmap_init_late() no longer has any users, so the remaining
late-init path in sparse_vmemmap_init_nid_late() is dead code.

Remove sparse_vmemmap_init_nid_late() and its declarations.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

---
v3->v4:
- Collect Acked-by from Mike Rapoport
---
 include/linux/mmzone.h |  7 -------
 mm/hugetlb_vmemmap.c   |  4 ----
 mm/hugetlb_vmemmap.h   |  5 -----
 mm/sparse-vmemmap.c    | 11 -----------
 mm/sparse.c            |  1 -
 5 files changed, 28 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ca2712187147..db9bdf62b170 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -2156,8 +2156,6 @@ static inline int preinited_vmemmap_section(const struct mem_section *section)
 }
 
 void sparse_vmemmap_init_nid_early(int nid);
-void sparse_vmemmap_init_nid_late(int nid);
-
 #else
 static inline int preinited_vmemmap_section(const struct mem_section *section)
 {
@@ -2166,10 +2164,6 @@ static inline int preinited_vmemmap_section(const struct mem_section *section)
 static inline void sparse_vmemmap_init_nid_early(int nid)
 {
 }
-
-static inline void sparse_vmemmap_init_nid_late(int nid)
-{
-}
 #endif
 
 static inline int online_section_nr(unsigned long nr)
@@ -2374,7 +2368,6 @@ static inline unsigned long next_present_section_nr(unsigned long section_nr)
 
 #else
 #define sparse_vmemmap_init_nid_early(_nid) do {} while (0)
-#define sparse_vmemmap_init_nid_late(_nid) do {} while (0)
 #define pfn_in_present_section pfn_valid
 #endif /* CONFIG_SPARSEMEM */
 
diff --git a/mm/hugetlb_vmemmap.c b/mm/hugetlb_vmemmap.c
index ee4fbd5fed0d..eefd6b5f9706 100644
--- a/mm/hugetlb_vmemmap.c
+++ b/mm/hugetlb_vmemmap.c
@@ -808,10 +808,6 @@ void __init hugetlb_vmemmap_init_early(int nid)
 		m->flags |= HUGE_BOOTMEM_HVO;
 	}
 }
-
-void __init hugetlb_vmemmap_init_late(int nid)
-{
-}
 #endif
 
 static const struct ctl_table hugetlb_vmemmap_sysctls[] = {
diff --git a/mm/hugetlb_vmemmap.h b/mm/hugetlb_vmemmap.h
index 18b490825215..7ac49c52457d 100644
--- a/mm/hugetlb_vmemmap.h
+++ b/mm/hugetlb_vmemmap.h
@@ -29,7 +29,6 @@ void hugetlb_vmemmap_optimize_folios(struct hstate *h, struct list_head *folio_l
 void hugetlb_vmemmap_optimize_bootmem_folios(struct hstate *h, struct list_head *folio_list);
 #ifdef CONFIG_SPARSEMEM_VMEMMAP_PREINIT
 void hugetlb_vmemmap_init_early(int nid);
-void hugetlb_vmemmap_init_late(int nid);
 #endif
 
 
@@ -81,10 +80,6 @@ static inline void hugetlb_vmemmap_init_early(int nid)
 {
 }
 
-static inline void hugetlb_vmemmap_init_late(int nid)
-{
-}
-
 static inline unsigned int hugetlb_vmemmap_optimizable_size(const struct hstate *h)
 {
 	return 0;
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 0b4019a93188..515a404b66c0 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -579,17 +579,6 @@ void __init sparse_vmemmap_init_nid_early(int nid)
 {
 	hugetlb_vmemmap_init_early(nid);
 }
-
-/*
- * This is called just before the initialization of page structures
- * through memmap_init. Zones are now initialized, so any work that
- * needs to be done that needs zone information can be done from
- * here.
- */
-void __init sparse_vmemmap_init_nid_late(int nid)
-{
-	hugetlb_vmemmap_init_late(nid);
-}
 #endif
 
 static void subsection_mask_set(unsigned long *map, unsigned long pfn,
diff --git a/mm/sparse.c b/mm/sparse.c
index 3917a47153d8..324213d8bdcb 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -320,7 +320,6 @@ static void __init sparse_init_nid(int nid, unsigned long pnum_begin,
 		}
 	}
 	sparse_usage_fini();
-	sparse_vmemmap_init_nid_late(nid);
 }
 
 /*
-- 
2.54.0