mm/page_io: remove unneeded ClearPageUptodate()

Patch series "Convert several functions in page_io.c to use a folio", v4.

Convert several functions in page_io.c to use a folio, which can remove
several implicit calls to compound_head().


This patch (of 10):

The VM_BUG_ON_FOLIO in swap_readpage() ensures that the page is already
!uptodate in __end_swap_bio_read() and sio_read_complete().  Just remove
unneeded ClearPageUptodate().

Link: https://lkml.kernel.org/r/20230721034451.16412-1-zhangpeng362@huawei.com
Link: https://lkml.kernel.org/r/20230721034451.16412-2-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>