[PATCH 08/21] iomap: Add iomap_invalidate_folio

Matthew Wilcox (Oracle)
2021-11-01T20:57:02Z

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

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
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 a6b64a1ad468..e9a60520e769 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 63f4ea4dac9b..91de58ca09fc 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