[PATCH v2 0/9] treewide, numa_memblks: remove redundant work during NUMA init

[Sang-Heon Jeon]

Every existing numa_add_memblk() caller passes a valid node id and
separately marks that node in numa_nodes_parsed with node_set(). In
addition, numa_nodemask_from_meminfo() recomputes the same "nodes that own
memory" set from numa_meminfo, which numa_nodes_parsed already contains.

This redundancy implicitly depends on the callers' node_set(). So, before
removing the redundancy, make numa_add_memblk() set the node in
numa_nodes_parsed explicitly. Then remove the per-caller node_set() and
numa_nodemask_from_meminfo().

Also, since the generic numa_register_meminfo() already sets
node_possible_map to numa_nodes_parsed, remove the duplicate assignment in
arch_numa's numa_register_nodes().

Patch 1 adds the node_set() to numa_add_memblk() itself, so every memblk's
node is set in numa_nodes_parsed on add.

Patches 2-6 depend on patch 1 and remove the redundant per-caller node_set()
from all callers.

Patch 7 removes both numa_nodemask_from_meminfo() call sites and the unused
function itself.

Patch 8 removes the duplicate node_possible_map assignment in arch_numa.

Patch 9 is a minor cleanup, using the existing numa_add_reserved_memblk()
wrapper in numa_cleanup_meminfo().

No functional change.

---
Changes from v1 [1]
- remove warning in numa_add_memblk_to() when start == end
- add Acked-by tag
- rebased onto latest mm-new

[1] https://lore.kernel.org/all/20260628135828.1393120-1-ekffu200098@xxxxxxxxx/
--- 

Sang-Heon Jeon (9):
  mm: numa_memblks: set numa_nodes_parsed in numa_add_memblk()
  ACPI: NUMA: remove redundant numa_nodes_parsed node_set()
  of/numa: remove redundant numa_nodes_parsed node_set()
  x86/numa: remove redundant numa_nodes_parsed node_set()
  arch_numa: remove redundant numa_nodes_parsed node_set()
  LoongArch: remove redundant numa_nodes_parsed node_set()
  mm: numa_memblks: remove redundant numa_nodemask_from_meminfo()
  arch_numa: remove redundant node_possible_map assignment
  mm: numa_memblks: use numa_add_reserved_memblk() in
    numa_cleanup_meminfo()

 arch/loongarch/kernel/numa.c |  1 -
 arch/x86/mm/amdtopology.c    |  1 -
 arch/x86/mm/numa.c           |  1 -
 drivers/acpi/numa/srat.c     |  2 --
 drivers/base/arch_numa.c     |  4 ----
 drivers/of/of_numa.c         |  5 +----
 mm/numa_memblks.c            | 39 +++++++++++++++++-------------------
 7 files changed, 19 insertions(+), 34 deletions(-)

-- 
2.43.0