[dm-devel] [PATCH v4 20/22] block: add __bio_add_folio

[Johannes Thumshirn]

From: Johannes Thumshirn <johannes.thumshirn at wdc.com>

Just like for bio_add_pages() add a no-fail variant for bio_add_folio().

Signed-off-by: Johannes Thumshirn <johannes.thumshirn at wdc.com>
---
 block/bio.c         | 8 ++++++++
 include/linux/bio.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/block/bio.c b/block/bio.c
index fd11614bba4d..f3a3524b53e4 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1138,6 +1138,14 @@ int bio_add_page(struct bio *bio, struct page *page,
 }
 EXPORT_SYMBOL(bio_add_page);
 
+void __bio_add_folio(struct bio *bio, struct folio *folio, size_t len,
+		     size_t off)
+{
+	WARN_ON_ONCE(len > UINT_MAX);
+	WARN_ON_ONCE(off > UINT_MAX);
+	__bio_add_page(bio, &folio->page, len, off);
+}
+
 /**
  * bio_add_folio - Attempt to add part of a folio to a bio.
  * @bio: BIO to add to.
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 0f8a8d7a6384..99fa832db836 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -473,6 +473,7 @@ int bio_add_zone_append_page(struct bio *bio, struct page *page,
 			     unsigned int len, unsigned int offset);
 void __bio_add_page(struct bio *bio, struct page *page,
 		unsigned int len, unsigned int off);
+void __bio_add_folio(struct bio *, struct folio *, size_t len, size_t off);
 int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
 void bio_iov_bvec_set(struct bio *bio, struct iov_iter *iter);
 void __bio_release_pages(struct bio *bio, bool mark_dirty);
-- 
2.39.2