Messages in this thread Patch in this message | | | From | Pankaj Raghav <> | Subject | [RFC 05/23] filemap: align index to mapping_min_order in filemap_range_has_page() | Date | Fri, 15 Sep 2023 20:38:30 +0200 |
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From: Luis Chamberlain <mcgrof@kernel.org>
page cache is mapping min_folio_order aligned. Use mapping min_folio_order to align the start_byte and end_byte in filemap_range_has_page().
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> --- mm/filemap.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c index 2c47729dc8b0..4dee24b5b61c 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -477,9 +477,12 @@ EXPORT_SYMBOL(filemap_flush); bool filemap_range_has_page(struct address_space *mapping, loff_t start_byte, loff_t end_byte) { + unsigned int min_order = mapping_min_folio_order(mapping); + unsigned int nrpages = 1UL << min_order; + pgoff_t index = round_down(start_byte >> PAGE_SHIFT, nrpages); struct folio *folio; - XA_STATE(xas, &mapping->i_pages, start_byte >> PAGE_SHIFT); - pgoff_t max = end_byte >> PAGE_SHIFT; + XA_STATE(xas, &mapping->i_pages, index); + pgoff_t max = round_down(end_byte >> PAGE_SHIFT, nrpages); if (end_byte < start_byte) return false; -- 2.40.1
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