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    SubjectRe: [PATCH v2 31/46] mm/writeback: Add folio_clear_dirty_for_io()
    On Tue, Jun 22, 2021 at 01:15:36PM +0100, Matthew Wilcox (Oracle) wrote:
    > Transform clear_page_dirty_for_io() into folio_clear_dirty_for_io()
    > and add a compatibility wrapper. Also move the declaration to pagemap.h
    > as this is page cache functionality that doesn't need to be used by the
    > rest of the kernel.
    >
    > Increases the size of the kernel by 79 bytes. While we remove a few
    > calls to compound_head(), we add a call to folio_nr_pages() to get the
    > stats correct.

    ... for the eventual support of multi-page folios.

    Otherwise looks good:

    Reviewed-by: Christoph Hellwig <hch@lst.de>

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