On 2021/01/04 19:48, SelvaKumar S wrote: > Export bio_map_kern() so that copy offload emulation can use > it to add vmalloced memory to bio. > > Signed-off-by: SelvaKumar S <selvakuma.s1@xxxxxxxxxxx> > --- > block/blk-map.c | 3 ++- > include/linux/blkdev.h | 2 ++ > 2 files changed, 4 insertions(+), 1 deletion(-) > > diff --git a/block/blk-map.c b/block/blk-map.c > index 21630dccac62..50d61475bb68 100644 > --- a/block/blk-map.c > +++ b/block/blk-map.c > @@ -378,7 +378,7 @@ static void bio_map_kern_endio(struct bio *bio) > * Map the kernel address into a bio suitable for io to a block > * device. Returns an error pointer in case of error. > */ > -static struct bio *bio_map_kern(struct request_queue *q, void *data, > +struct bio *bio_map_kern(struct request_queue *q, void *data, > unsigned int len, gfp_t gfp_mask) > { > unsigned long kaddr = (unsigned long)data; > @@ -428,6 +428,7 @@ static struct bio *bio_map_kern(struct request_queue *q, void *data, > bio->bi_end_io = bio_map_kern_endio; > return bio; > } > +EXPORT_SYMBOL(bio_map_kern); Simple copy support is a block layer code, so you I do not think you need this. You only need to remove the static declaration of the function. > > static void bio_copy_kern_endio(struct bio *bio) > { > diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h > index 070de09425ad..81f9e7bec16c 100644 > --- a/include/linux/blkdev.h > +++ b/include/linux/blkdev.h > @@ -936,6 +936,8 @@ extern int blk_rq_map_user(struct request_queue *, struct request *, > struct rq_map_data *, void __user *, unsigned long, > gfp_t); > extern int blk_rq_unmap_user(struct bio *); > +extern struct bio *bio_map_kern(struct request_queue *q, void *data, > + unsigned int len, gfp_t gfp_mask); > extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t); > extern int blk_rq_map_user_iov(struct request_queue *, struct request *, > struct rq_map_data *, const struct iov_iter *, > -- Damien Le Moal Western Digital Research -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel