diff mbox series

[05/16] bvec: add memcpy_{from,to}_bvec and memzero_bvec helper

Message ID 20210608160603.1535935-6-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/16] mm: use kmap_local_page in memzero_page | expand

Commit Message

Christoph Hellwig June 8, 2021, 4:05 p.m. UTC 
Add helpers to perform common memory operation on a bvec.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/bvec.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Chaitanya Kulkarni June 8, 2021, 6:21 p.m. UTC | #1 
On 6/8/21 09:07, Christoph Hellwig wrote:
> Add helpers to perform common memory operation on a bvec.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Looks good.

Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
diff mbox series

Patch

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index d64d6c0ceb77..ac835fa01ee3 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -189,4 +189,19 @@  static inline void *bvec_kmap_local(struct bio_vec *bvec)
 	return kmap_local_page(bvec->bv_page) + bvec->bv_offset;
 }
 
+static inline void memcpy_from_bvec(char *to, struct bio_vec *bvec)
+{
+	memcpy_from_page(to, bvec->bv_page, bvec->bv_offset, bvec->bv_len);
+}
+
+static inline void memcpy_to_bvec(struct bio_vec *bvec, const char *from)
+{
+	memcpy_to_page(bvec->bv_page, bvec->bv_offset, from, bvec->bv_len);
+}
+
+static inline void memzero_bvec(struct bio_vec *bvec)
+{
+	memzero_page(bvec->bv_page, bvec->bv_offset, bvec->bv_len);
+}
+
 #endif /* __LINUX_BVEC_H */