mm: remove __set_page_dirty_nobuffers()

There are no more callers of __set_page_dirty_nobuffers(), remove it.

Link: https://lkml.kernel.org/r/20240327143008.3739435-1-wangkefeng.wang@huawei.comSigned-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/pagemap.h

@@ -1158,7 +1158,6 @@ static inline void folio_cancel_dirty(struct folio *folio)
 bool folio_clear_dirty_for_io(struct folio *folio);
 bool clear_page_dirty_for_io(struct page *page);
 void folio_invalidate(struct folio *folio, size_t offset, size_t length);
-int __set_page_dirty_nobuffers(struct page *page);
 bool noop_dirty_folio(struct address_space *mapping, struct folio *folio);
 
 #ifdef CONFIG_MIGRATION

mm/folio-compat.c

@@ -58,12 +58,6 @@ bool set_page_dirty(struct page *page)
 }
 EXPORT_SYMBOL(set_page_dirty);
 
-int __set_page_dirty_nobuffers(struct page *page)
-{
-	return filemap_dirty_folio(page_mapping(page), page_folio(page));
-}
-EXPORT_SYMBOL(__set_page_dirty_nobuffers);
-
 bool clear_page_dirty_for_io(struct page *page)
 {
 	return folio_clear_dirty_for_io(page_folio(page));