Commit cd1067be authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

buffer: Add folio_buffers() 



While there is no intent to use large folios in filesystems using buffer
heads, converting the filesystems to use single-page folios is still worth
doing to remove legacy infrastructure and hidden calls to compound_head().
These helper functions are needed for that conversion to take place.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: default avatarDamien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: default avatarDamien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs
parent 4495a96c

include/linux/buffer_head.h

+1 −0
Original line number Diff line number Diff line
@@ -144,6 +144,7 @@ BUFFER_FNS(Defer_Completion, defer_completion) 
		((struct buffer_head *)page_private(page));	\

	})

#define page_has_buffers(page)	PagePrivate(page)

#define folio_buffers(folio)		folio_get_private(folio)



void buffer_check_dirty_writeback(struct page *page,

				     bool *dirty, bool *writeback);