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Chao Yu authored
Convert to use folio, so that we can get rid of 'page->index' to prepare for removal of 'index' field in structure page [1]. [1] https://lore.kernel.org/all/Zp8fgUSIBGQ1TN0D@casper.infradead.org/ Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Chao Yu <chao@kernel.org> Reviewed-by: Li Zetao <lizetao1@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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