[03/23] block: add a bvec_set_virt helper

Commit Message

Christoph Hellwig Feb. 3, 2023, 3:06 p.m. UTC

A small wrapper around bvec_set_page for callers that have a virtual
address.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Chaitanya Kulkarni <[e-mail]>
Reviewed-by: Johannes Thumshirn <[e-mail]>
---
 include/linux/bvec.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 2bae1134499e7f..f2d22931f3030a 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -63,6 +63,18 @@  static inline void bvec_set_folio(struct bio_vec *bv, struct folio *folio,
 	bvec_set_page(bv, &folio->page, len, offset);
 }
 
+/**
+ * bvec_set_virt - initialize a bvec based on a virtual address
+ * @bv:		bvec to initialize
+ * @vaddr:	virtual address to set the bvec to
+ * @len:	length of the bvec
+ */
+static inline void bvec_set_virt(struct bio_vec *bv, void *vaddr,
+		unsigned int len)
+{
+	bvec_set_page(bv, virt_to_page(vaddr), len, offset_in_page(vaddr));
+}
+
 struct bvec_iter {
 	sector_t		bi_sector;	/* device address in 512 byte
 						   sectors */