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Commit 75c72b83 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

block: merge __bio_map_kern into bio_map_kern 



This saves a little code, and allow to simplify the error handling.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarMing Lei <tom.leiming@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 26e49cfc

block/bio.c

+17 −33
Original line number Diff line number Diff line
@@ -1429,8 +1429,18 @@ static void bio_map_kern_endio(struct bio *bio, int err) 
	bio_put(bio);

}



static struct bio *__bio_map_kern(struct request_queue *q, void *data,

				  unsigned int len, gfp_t gfp_mask)

/**

 *	bio_map_kern	-	map kernel address into bio

 *	@q: the struct request_queue for the bio

 *	@data: pointer to buffer to map

 *	@len: length in bytes

 *	@gfp_mask: allocation flags for bio allocation

 *

 *	Map the kernel address into a bio suitable for io to a block

 *	device. Returns an error pointer in case of error.

 */

struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,

			 gfp_t gfp_mask)

{

	unsigned long kaddr = (unsigned long)data;

	unsigned long end = (kaddr + len + PAGE_SIZE - 1) >> PAGE_SHIFT;
@@ -1454,8 +1464,11 @@ static struct bio *__bio_map_kern(struct request_queue *q, void *data, 
			bytes = len;



		if (bio_add_pc_page(q, bio, virt_to_page(data), bytes,

				    offset) < bytes)

			break;

				    offset) < bytes) {

			/* we don't support partial mappings */

			bio_put(bio);

			return ERR_PTR(-EINVAL);

		}



		data += bytes;

		len -= bytes;
@@ -1465,35 +1478,6 @@ static struct bio *__bio_map_kern(struct request_queue *q, void *data, 
	bio->bi_end_io = bio_map_kern_endio;

	return bio;

}



/**

 *	bio_map_kern	-	map kernel address into bio

 *	@q: the struct request_queue for the bio

 *	@data: pointer to buffer to map

 *	@len: length in bytes

 *	@gfp_mask: allocation flags for bio allocation

 *

 *	Map the kernel address into a bio suitable for io to a block

 *	device. Returns an error pointer in case of error.

 */

struct bio *bio_map_kern(struct request_queue *q, void *data, unsigned int len,

			 gfp_t gfp_mask)

{

	struct bio *bio;



	bio = __bio_map_kern(q, data, len, gfp_mask);

	if (IS_ERR(bio))

		return bio;



	if (bio->bi_iter.bi_size == len)

		return bio;



	/*

	 * Don't support partial mappings.

	 */

	bio_put(bio);

	return ERR_PTR(-EINVAL);

}

EXPORT_SYMBOL(bio_map_kern);



static void bio_copy_kern_endio(struct bio *bio, int err)