[PATCH v2 1/2] block: bio-integrity: export bio_integrity_free func

[Max Gurtovoy]

This function is the complementary function to bio_integrity_alloc.
Export it for users that would like to free the integrity context
explicitly.

Signed-off-by: Max Gurtovoy <mgurtovoy at nvidia.com>
---
 block/bio-integrity.c | 1 +
 block/blk.h           | 4 ----
 include/linux/bio.h   | 6 ++++++
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index 4533eb491661..276ca86fc1d3 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -110,6 +110,7 @@ void bio_integrity_free(struct bio *bio)
 	bio->bi_integrity = NULL;
 	bio->bi_opf &= ~REQ_INTEGRITY;
 }
+EXPORT_SYMBOL(bio_integrity_free);
 
 /**
  * bio_integrity_add_page - Attach integrity metadata
diff --git a/block/blk.h b/block/blk.h
index cc4e8873dfde..644e5f30a983 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -179,7 +179,6 @@ static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 void blk_flush_integrity(void);
 bool __bio_integrity_endio(struct bio *);
-void bio_integrity_free(struct bio *bio);
 static inline bool bio_integrity_endio(struct bio *bio)
 {
 	if (bio_integrity(bio))
@@ -245,9 +244,6 @@ static inline bool bio_integrity_endio(struct bio *bio)
 {
 	return true;
 }
-static inline void bio_integrity_free(struct bio *bio)
-{
-}
 static inline int blk_integrity_add(struct gendisk *disk)
 {
 	return 0;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index d766be7152e1..64aabdacac24 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -700,6 +700,7 @@ static inline bool bioset_initialized(struct bio_set *bs)
 		bip_for_each_vec(_bvl, _bio->bi_integrity, _iter)
 
 extern struct bio_integrity_payload *bio_integrity_alloc(struct bio *, gfp_t, unsigned int);
+extern void bio_integrity_free(struct bio *);
 extern int bio_integrity_add_page(struct bio *, struct page *, unsigned int, unsigned int);
 extern bool bio_integrity_prep(struct bio *);
 extern void bio_integrity_advance(struct bio *, unsigned int);
@@ -764,6 +765,11 @@ static inline void *bio_integrity_alloc(struct bio * bio, gfp_t gfp,
 	return ERR_PTR(-EINVAL);
 }
 
+static inline void bio_integrity_free(struct bio *bio)
+{
+	return;
+}
+
 static inline int bio_integrity_add_page(struct bio *bio, struct page *page,
 					unsigned int len, unsigned int offset)
 {
-- 
2.18.1