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mm/khugepaged: use ALIGN helpers for PMD alignment

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PMD alignment in khugepaged is currently implemented using a mix of
rounding helpers and open-coded bitmask operations.

Use ALIGN() and ALIGN_DOWN() consistently for PMD-sized address range
alignment, matching the preferred style for address and size handling.

No functional change intended.

Link: https://lore.kernel.org/20260409014323.2385982-1-ye.liu@linux.dev
Signed-off-by: Ye Liu <liuye@kylinos.cn>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Lorenzo Stoakes <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam@infradead.org>
Cc: Liu Ye <liuye@kylinos.cn>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ye Liu 2026-04-09 09:43:22 +08:00 committed by Andrew Morton
parent db5e2c01ca
commit 98e09ce7bb
1 changed files with 4 additions and 4 deletions
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8
mm/khugepaged.c
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@ -2528,8 +2528,8 @@ static void collapse_scan_mm_slot(unsigned int progress_max,
cc->progress++;
continue;
}
hstart = round_up(vma->vm_start, HPAGE_PMD_SIZE);
hend = round_down(vma->vm_end, HPAGE_PMD_SIZE);
hstart = ALIGN(vma->vm_start, HPAGE_PMD_SIZE);
hend = ALIGN_DOWN(vma->vm_end, HPAGE_PMD_SIZE);
if (khugepaged_scan.address > hend) {
cc->progress++;
continue;
@ -2845,8 +2845,8 @@ int madvise_collapse(struct vm_area_struct *vma, unsigned long start,
mmgrab(mm);
lru_add_drain_all();
hstart = (start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
hend = end & HPAGE_PMD_MASK;
hstart = ALIGN(start, HPAGE_PMD_SIZE);
hend = ALIGN_DOWN(end, HPAGE_PMD_SIZE);
for (addr = hstart; addr < hend; addr += HPAGE_PMD_SIZE) {
enum scan_result result = SCAN_FAIL;