mm/mm_init: simplify zone_spanned_pages_in_node()

Hello,

This series simplifies zone_spanned_pages_in_node(), which adjusts *zone_start_pfn and *zone_end_pfn before and after calling adjust_zone_range_for_zone_movable(). The helper adjusts the same two values, which makes the code harder to follow.

Patch 1 folds adjust_zone_range_for_zone_movable() into the caller, extracts zone_movable_pfn[nid] into a local variable, and reduces the indentation level.

Patch 2 removes the clamping to node_end_pfn and moves the check and the clamping to node_start_pfn into the ZONE_MOVABLE branch, which is the only place they have an effect. It also merges the two branches that adjust for zone_movable_pfn[nid].

No functional change.

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Changes from v2 [2]
- Squash patches 2 to 4 into one and fold patch 5 into patch 1, as Mike suggested

Changes from v1 [1]
- Change base to memblock/for-next
- Add patch 4 to merge the two branches
- Update comment

[1] https://lore.kernel.org/all/[email protected]/
[2] https://lore.kernel.org/all/[email protected]/
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Sang-Heon Jeon (2):
mm/mm_init: fold adjust_zone_range_for_zone_movable() into its only
caller
mm/mm_init: simplify ZONE_MOVABLE branch in
zone_spanned_pages_in_node()

 mm/mm_init.c | 79 ++++++++++++++++++++++++----------------------------
 1 file changed, 36 insertions(+), 43 deletions(-)

2.43.0