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| author | David Hildenbrand <david@redhat.com> | 2025-09-01 17:03:39 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-09-21 14:22:05 -0700 |
| commit | 541541dbfeb84f0995ad1ec54a643c72081d46fc (patch) | |
| tree | 914518ae5585832d582d3e42f7b9f6340aac324b /mm/gup.c | |
| parent | 1a55ac6068ae4ca2024164c6d484d681a3f98299 (diff) | |
| download | linux-541541dbfeb84f0995ad1ec54a643c72081d46fc.tar.gz linux-541541dbfeb84f0995ad1ec54a643c72081d46fc.tar.bz2 linux-541541dbfeb84f0995ad1ec54a643c72081d46fc.zip | |
mm/gup: drop nth_page() usage within folio when recording subpages
nth_page() is no longer required when iterating over pages within a single
folio, so let's just drop it when recording subpages.
Link: https://lkml.kernel.org/r/20250901150359.867252-19-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/gup.c')
| -rw-r--r-- | mm/gup.c | 7 |
1 files changed, 3 insertions, 4 deletions
@@ -488,12 +488,11 @@ static int record_subpages(struct page *page, unsigned long sz, unsigned long addr, unsigned long end, struct page **pages) { - struct page *start_page; int nr; - start_page = nth_page(page, (addr & (sz - 1)) >> PAGE_SHIFT); + page += (addr & (sz - 1)) >> PAGE_SHIFT; for (nr = 0; addr != end; nr++, addr += PAGE_SIZE) - pages[nr] = nth_page(start_page, nr); + pages[nr] = page++; return nr; } @@ -1512,7 +1511,7 @@ next_page: } for (j = 0; j < page_increm; j++) { - subpage = nth_page(page, j); + subpage = page + j; pages[i + j] = subpage; flush_anon_page(vma, subpage, start + j * PAGE_SIZE); flush_dcache_page(subpage); |