[PATCH v2 12/28] iomap: Add iomap_invalidate_folio

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Keep iomap_invalidatepage around as a wrapper for use in address_space
operations.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/iomap/buffered-io.c | 20 ++++++++++++--------
 include/linux/iomap.h  |  1 +
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 49f96fdadcb4..b7cbe4d202d8 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -468,23 +468,27 @@ iomap_releasepage(struct page *page, gfp_t gfp_mask)
 }
 EXPORT_SYMBOL_GPL(iomap_releasepage);
 
-void
-iomap_invalidatepage(struct page *page, unsigned int offset, unsigned int len)
+void iomap_invalidate_folio(struct folio *folio, size_t offset, size_t len)
 {
-	struct folio *folio = page_folio(page);
-
-	trace_iomap_invalidatepage(page->mapping->host, offset, len);
+	trace_iomap_invalidatepage(folio->mapping->host, offset, len);
 
 	/*
 	 * If we're invalidating the entire page, clear the dirty state from it
 	 * and release it to avoid unnecessary buildup of the LRU.
 	 */
-	if (offset == 0 && len == PAGE_SIZE) {
-		WARN_ON_ONCE(PageWriteback(page));
-		cancel_dirty_page(page);
+	if (offset == 0 && len == folio_size(folio)) {
+		WARN_ON_ONCE(folio_test_writeback(folio));
+		folio_cancel_dirty(folio);
 		iomap_page_release(folio);
 	}
 }
+EXPORT_SYMBOL_GPL(iomap_invalidate_folio);
+
+void iomap_invalidatepage(struct page *page, unsigned int offset,
+		unsigned int len)
+{
+	iomap_invalidate_folio(page_folio(page), offset, len);
+}
 EXPORT_SYMBOL_GPL(iomap_invalidatepage);
 
 #ifdef CONFIG_MIGRATION
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 6d1b08d0ae93..29491fb9c5ba 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -225,6 +225,7 @@ void iomap_readahead(struct readahead_control *, const struct iomap_ops *ops);
 int iomap_is_partially_uptodate(struct page *page, unsigned long from,
 		unsigned long count);
 int iomap_releasepage(struct page *page, gfp_t gfp_mask);
+void iomap_invalidate_folio(struct folio *folio, size_t offset, size_t len);
 void iomap_invalidatepage(struct page *page, unsigned int offset,
 		unsigned int len);
 #ifdef CONFIG_MIGRATION
-- 
2.33.0