Commit 9eb7c76d authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm/filemap: Add i_blocks_per_folio() 



Reimplement i_blocks_per_page() as a wrapper around i_blocks_per_folio().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent cd78ab11

include/linux/pagemap.h

+12 −6
Original line number Diff line number Diff line
@@ -1149,19 +1149,25 @@ static inline int page_mkwrite_check_truncate(struct page *page, 
}



/**

 * i_blocks_per_page - How many blocks fit in this page.

 * i_blocks_per_folio - How many blocks fit in this folio.

 * @inode: The inode which contains the blocks.

 * @page: The page (head page if the page is a THP).

 * @folio: The folio.

 *

 * If the block size is larger than the size of this page, return zero.

 * If the block size is larger than the size of this folio, return zero.

 *

 * Context: The caller should hold a refcount on the page to prevent it

 * Context: The caller should hold a refcount on the folio to prevent it

 * from being split.

 * Return: The number of filesystem blocks covered by this page.

 * Return: The number of filesystem blocks covered by this folio.

 */

static inline

unsigned int i_blocks_per_folio(struct inode *inode, struct folio *folio)

{

	return folio_size(folio) >> inode->i_blkbits;

}



static inline

unsigned int i_blocks_per_page(struct inode *inode, struct page *page)

{

	return thp_size(page) >> inode->i_blkbits;

	return i_blocks_per_folio(inode, page_folio(page));

}

#endif /* _LINUX_PAGEMAP_H */