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mm: mlock: use walk_page_range_vma() in mlock_vma_pages_range()

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The mlock_vma_pages_range() uses walk_page_range() to walk the page table.
Fortunately, the caller always passes start/end that falls within a
single VMA, apply_vma_lock_flags() iterates per-VMA, and
apply_mlockall_flags() passes the whole VMA.

Since there is no .test_walk in mlock_walk_ops and VM_PFNMAP was filtered
by vma_supports_mlock(), it's safe to replace walk_page_range() with
walk_page_range_vma() to eliminate an unnecessary find_vma() lookup.

Link: https://lore.kernel.org/20260618092845.3905740-4-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2026-06-18 17:28:44 +08:00 committed by Andrew Morton
parent 334509572d
commit d4c63a378b
1 changed files with 1 additions and 1 deletions
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2
mm/mlock.c
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@ -446,7 +446,7 @@ static void mlock_vma_pages_range(struct vm_area_struct *vma,
vma_flags_reset_once(vma, new_vma_flags);
lru_add_drain();
walk_page_range(vma->vm_mm, start, end, &mlock_walk_ops, NULL);
walk_page_range_vma(vma, start, end, &mlock_walk_ops, NULL);
lru_add_drain();
if (vma_flags_test(new_vma_flags, VMA_IO_BIT)) {