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mm/filemap: Add i_blocks_per_folio() 

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>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-04-27 23:11:28 -04:00
parent cd78ab11a8
commit 9eb7c76dd3
1 changed files with 12 additions and 6 deletions
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18
include/linux/pagemap.h
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@ -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 */