[PATCH v3 09/19] mm/mm_init: Defer hugetlb reservation until after zone initialization

[Muchun Song]

hugetlb_cma_reserve() and hugetlb_bootmem_alloc() currently run before
free_area_init(), so HugeTLB reservation happens before zone state is
initialized.

Move the reservation step after free_area_init() so the relevant zone
information is available before HugeTLB reserves memory. This is needed
for later hugetlb changes that validate boot-time HugeTLB reservations
against zone boundaries.

Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Reviewed-by: Oscar Salvador (SUSE) <osalvador@xxxxxxxxxx>
---
v2->v3:
- collect Reviewed-by from Mike Rapoport
- collect Reviewed-by from Oscar Salvador
---
 mm/mm_init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/mm_init.c b/mm/mm_init.c
index f349a6f34139..4601e5d659eb 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2691,11 +2691,11 @@ void __init mm_core_init_early(void)
 {
 	int nid;
 
+	free_area_init();
+
 	hugetlb_cma_reserve();
 	hugetlb_bootmem_alloc();
 
-	free_area_init();
-
 	sparse_init();
 	for_each_node_state(nid, N_MEMORY)
 		sparse_vmemmap_init_nid_late(nid);
-- 
2.54.0