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| author |  Matthew Wilcox (Oracle) <willy@infradead.org>
| 2022-01-17 16:33:26 -0500 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org>
| 2022-03-21 12:59:02 -0400 |
| commit | 4ba1119cd53166d853050ff1a9d76079cd8f8e06 (patch) | |
| tree | a70d8b819fcce1322e1193bbae30676eb3ce0ebf /include/linux/mm.h | |
| parent | mm: Turn head_compound_mapcount() into folio_entire_mapcount() (diff) | |
| download | linux-4ba1119cd53166d853050ff1a9d76079cd8f8e06.tar.gz linux-4ba1119cd53166d853050ff1a9d76079cd8f8e06.tar.bz2 linux-4ba1119cd53166d853050ff1a9d76079cd8f8e06.zip | |
mm: Add folio_mapcount()
This implements the same algorithm as total_mapcount(), which is
transformed into a wrapper function.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 70f0ca217962..0d380dc26847 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -825,8 +825,14 @@ static inline int page_mapcount(struct page *page) return atomic_read(&page->_mapcount) + 1; } +int folio_mapcount(struct folio *folio); + #ifdef CONFIG_TRANSPARENT_HUGEPAGE -int total_mapcount(struct page *page); +static inline int total_mapcount(struct page *page) +{ + return folio_mapcount(page_folio(page)); +} + int page_trans_huge_mapcount(struct page *page); #else static inline int total_mapcount(struct page *page) |