This is the folio equivalent of unmap_and_put_page(), which remains as
a wrapper for it.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
include/linux/highmem.h | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 99c474de800d..4cacc0e43b51 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -551,10 +551,24 @@ static inline void folio_zero_range(struct folio *folio,
zero_user_segments(&folio->page, start, start + length, 0, 0);
}
-static inline void unmap_and_put_page(struct page *page, void *addr)
+/**
+ * folio_release_kmap - Unmap a folio and drop a refcount.
+ * @folio: The folio to release.
+ * @addr: The address previously returned by a call to kmap_local_folio().
+ *
+ * It is common, eg in directory handling to kmap a folio. This function
+ * unmaps the folio and drops the refcount that was being held to keep the
+ * folio alive while we accessed it.
+ */
+static inline void folio_release_kmap(struct folio *folio, void *addr)
{
kunmap_local(addr);
- put_page(page);
+ folio_put(folio);
+}
+
+static inline void unmap_and_put_page(struct page *page, void *addr)
+{
+ folio_release_kmap(page_folio(page), addr);
}
#endif /* _LINUX_HIGHMEM_H */
--
2.40.1
