mm/mm_init.c: only align start of ZONE_MOVABLE on nodes with memory

At the beginning of find_zone_movable_pfns_for_nodes(), it has properly
set node_states[N_MEMORY] in early_calculate_totalpages().

Instead of iterating over all possible nodes, we can just do the alignment
on nodes with memory.

Link: https://lkml.kernel.org/r/20250211082900.10877-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/mm_init.c b/mm/mm_init.c
index de18d3ad12e15328cff139107ae627a9d66a6329..6078b3651f2e1f6e6210775375eda870a99eb6be 100644 (file)
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -545,7 +545,7 @@ restart:
 
 out2:
        /* Align start of ZONE_MOVABLE on all nids to MAX_ORDER_NR_PAGES */
-       for (nid = 0; nid < MAX_NUMNODES; nid++) {
+       for_each_node_state(nid, N_MEMORY) {
                unsigned long start_pfn, end_pfn;
 
                zone_movable_pfn[nid] =