[PATCH v14 077/138] mm/filemap: Add i_blocks_per_folio()

Matthew Wilcox (Oracle)
2021-07-15T04:40:46Z

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

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
include/linux/pagemap.h | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 006de2d84d06..412db88b8d0c 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -1150,19 +1150,25 @@ 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 */
--
2.30.2