We introduce bio_add_pfn which is the same as bio_add_page but expects a
pfn_t instead of a page pointer. bio_add_page is then converted to be
an inline call to bio_add_pfn.
Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Signed-off-by: Stephen Bates <sbates@xxxxxxxxxxxx>
---
block/bio.c | 16 ++++++++--------
include/linux/bio.h | 19 ++++++++++++++++++-
include/linux/pfn_t.h | 5 +++++
3 files changed, 31 insertions(+), 9 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index e785f50..d8b6aeb 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -810,17 +810,17 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page
EXPORT_SYMBOL(bio_add_pc_page);
/**
- * bio_add_page - attempt to add page to bio
+ * bio_add_pfn - attempt to add pfn to bio
* @bio: destination bio
- * @page: page to add
+ * @pfn: pfn to add
* @len: vec entry length
* @offset: vec entry offset
*
- * Attempt to add a page to the bio_vec maplist. This will only fail
+ * Attempt to add a pfn to the bio_vec maplist. This will only fail
* if either bio->bi_vcnt == bio->bi_max_vecs or it's a cloned bio.
*/
-int bio_add_page(struct bio *bio, struct page *page,
- unsigned int len, unsigned int offset)
+int bio_add_pfn(struct bio *bio, pfn_t pfn, unsigned int len,
+ unsigned int offset)
{
struct bio_vec *bv;
@@ -838,7 +838,7 @@ int bio_add_page(struct bio *bio, struct page *page,
if (bio->bi_vcnt > 0) {
bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
- if (page == bvec_page(bv) &&
+ if (pfn_t_equal(pfn, bv->bv_pfn) &&
offset == bv->bv_offset + bv->bv_len) {
bv->bv_len += len;
goto done;
@@ -849,7 +849,7 @@ int bio_add_page(struct bio *bio, struct page *page,
return 0;
bv = &bio->bi_io_vec[bio->bi_vcnt];
- bvec_set_page(bv, page);
+ bv->bv_pfn = pfn;
bv->bv_len = len;
bv->bv_offset = offset;
@@ -858,7 +858,7 @@ int bio_add_page(struct bio *bio, struct page *page,
bio->bi_iter.bi_size += len;
return len;
}
-EXPORT_SYMBOL(bio_add_page);
+EXPORT_SYMBOL(bio_add_pfn);
/**
* bio_iov_iter_get_pages - pin user or kernel pages and add them to a bio
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 16c0b02..bc5f5d3 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -429,7 +429,24 @@ extern void bio_init(struct bio *bio, struct bio_vec *table,
extern void bio_reset(struct bio *);
void bio_chain(struct bio *, struct bio *);
-extern int bio_add_page(struct bio *, struct page *, unsigned int,unsigned int);
+extern int bio_add_pfn(struct bio *bio, pfn_t, unsigned int, unsigned int);
+
+/**
+ * bio_add_page - attempt to add page to bio
+ * @bio: destination bio
+ * @page: page to add
+ * @len: vec entry length
+ * @offset: vec entry offset
+ *
+ * Attempt to add a pfn to the bio_vec maplist. This will only fail
+ * if either bio->bi_vcnt == bio->bi_max_vecs or it's a cloned bio.
+ */
+static inline int bio_add_page(struct bio *bio, struct page *page,
+ unsigned int len, unsigned int offset)
+{
+ return bio_add_pfn(bio, page_to_pfn_t(page), len, offset);
+}
+
extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *,
unsigned int, unsigned int);
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h
index 07bd5ba..9612c87 100644
--- a/include/linux/pfn_t.h
+++ b/include/linux/pfn_t.h
@@ -48,6 +48,11 @@ static inline pfn_t phys_to_pfn_t(phys_addr_t addr, u64 flags)
return __pfn_to_pfn_t(addr >> PAGE_SHIFT, flags);
}
+static inline bool pfn_t_equal(pfn_t a, pfn_t b)
+{
+ return a.val == b.val;
+}
+
static inline bool pfn_t_has_page(pfn_t pfn)
{
return (pfn.val & PFN_MAP) == PFN_MAP || (pfn.val & PFN_DEV) == 0;
--
2.1.4
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