md: use folio_alloc_buffers()

Remove the last user of alloc_page_buffers().  Use folio_alloc_buffers()
instead, since alloc_page_buffers() is a wrap over it.  Although the pages
used in md-bitmap are not folios, as they are not mapped into userspace
nor enter the page cache, but they still have buffer heads attached. 
Cleaning up the code to not use buffer heads is future work.

[ziy@nvidia.com: reword commit message]
Link: https://lore.kernel.org/20260920-remove-pg_private-v5-13-bb68b6a21869@nvidia.com
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index fd2c7115c054..6ce2db05c60f 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -197,7 +197,6 @@ void folio_set_bh(struct buffer_head *bh, struct folio *folio,
 		  unsigned long offset);
 struct buffer_head *folio_alloc_buffers(struct folio *folio, unsigned long size,
 					gfp_t gfp);
-struct buffer_head *alloc_page_buffers(struct page *page, unsigned long size);
 struct buffer_head *create_empty_buffers(struct folio *folio,
 		unsigned long blocksize, unsigned long b_state);
 void end_buffer_read_sync(struct buffer_head *bh, int uptodate);