mm/page-flags: make PageUptodate return bool

Make PageUptodate return bool to align the return values of
folio_test_uptodate function

Link: https://lkml.kernel.org/r/20240422032725.41452-1-gehao@kylinos.cnSigned-off-by: Hao Ge <gehao@kylinos.cn>
Cc: David Hildenbrand <david@redhat.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Ruihan Li <lrh2000@pku.edu.cn>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/page-flags.h

@@ -789,7 +789,7 @@ static inline bool folio_test_uptodate(const struct folio *folio)
 	return ret;
 }
 
-static inline int PageUptodate(const struct page *page)
+static inline bool PageUptodate(const struct page *page)
 {
 	return folio_test_uptodate(page_folio(page));
 }