diff options
author | NeilBrown <neilb@suse.de> | 2007-09-25 10:35:59 (GMT) |
---|---|---|
committer | Jens Axboe <axboe@carl.home.kernel.dk> | 2007-10-10 07:25:56 (GMT) |
commit | 5705f7021748a69d84d6567e68e8851dab551464 (patch) | |
tree | 5a6dbc8fc6055c0334f4a97540e36a7844b9c482 /drivers/s390/block | |
parent | 9dfa52831e96194b8649613e3131baa2c109f7dc (diff) | |
download | linux-5705f7021748a69d84d6567e68e8851dab551464.tar.xz |
Introduce rq_for_each_segment replacing rq_for_each_bio
Every usage of rq_for_each_bio wraps a usage of
bio_for_each_segment, so these can be combined into
rq_for_each_segment.
We define "struct req_iterator" to hold the 'bio' and 'index' that
are needed for the double iteration.
Signed-off-by: Neil Brown <neilb@suse.de>
Various compile fixes by me...
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/s390/block')
-rw-r--r-- | drivers/s390/block/dasd_diag.c | 11 | ||||
-rw-r--r-- | drivers/s390/block/dasd_eckd.c | 15 | ||||
-rw-r--r-- | drivers/s390/block/dasd_fba.c | 15 |
3 files changed, 15 insertions, 26 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index d32c60d..6bb9676 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -472,14 +472,13 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) struct dasd_ccw_req *cqr; struct dasd_diag_req *dreq; struct dasd_diag_bio *dbio; - struct bio *bio; + struct req_iterator iter; struct bio_vec *bv; char *dst; unsigned int count, datasize; sector_t recid, first_rec, last_rec; unsigned int blksize, off; unsigned char rw_cmd; - int i; if (rq_data_dir(req) == READ) rw_cmd = MDSK_READ_REQ; @@ -493,13 +492,11 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) last_rec = (req->sector + req->nr_sectors - 1) >> device->s2b_shift; /* Check struct bio and count the number of blocks for the request. */ count = 0; - rq_for_each_bio(bio, req) { - bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { if (bv->bv_len & (blksize - 1)) /* Fba can only do full blocks. */ return ERR_PTR(-EINVAL); count += bv->bv_len >> (device->s2b_shift + 9); - } } /* Paranoia. */ if (count != last_rec - first_rec + 1) @@ -516,8 +513,7 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) dreq->block_count = count; dbio = dreq->bio; recid = first_rec; - rq_for_each_bio(bio, req) { - bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; for (off = 0; off < bv->bv_len; off += blksize) { memset(dbio, 0, sizeof (struct dasd_diag_bio)); @@ -528,7 +524,6 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req) dst += blksize; recid++; } - } } cqr->retries = DIAG_MAX_RETRIES; cqr->buildclk = get_clock(); diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index ea63ba7..36ba458 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -1176,7 +1176,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) struct LO_eckd_data *LO_data; struct dasd_ccw_req *cqr; struct ccw1 *ccw; - struct bio *bio; + struct req_iterator iter; struct bio_vec *bv; char *dst; unsigned int blksize, blk_per_trk, off; @@ -1185,7 +1185,6 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) sector_t first_trk, last_trk; unsigned int first_offs, last_offs; unsigned char cmd, rcmd; - int i; private = (struct dasd_eckd_private *) device->private; if (rq_data_dir(req) == READ) @@ -1206,8 +1205,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) /* Check struct bio and count the number of blocks for the request. */ count = 0; cidaw = 0; - rq_for_each_bio(bio, req) { - bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { if (bv->bv_len & (blksize - 1)) /* Eckd can only do full blocks. */ return ERR_PTR(-EINVAL); @@ -1217,7 +1215,6 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) bv->bv_len)) cidaw += bv->bv_len >> (device->s2b_shift + 9); #endif - } } /* Paranoia. */ if (count != last_rec - first_rec + 1) @@ -1257,7 +1254,7 @@ dasd_eckd_build_cp(struct dasd_device * device, struct request *req) locate_record(ccw++, LO_data++, first_trk, first_offs + 1, last_rec - recid + 1, cmd, device, blksize); } - rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; if (dasd_page_cache) { char *copy = kmem_cache_alloc(dasd_page_cache, @@ -1328,12 +1325,12 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) { struct dasd_eckd_private *private; struct ccw1 *ccw; - struct bio *bio; + struct req_iterator iter; struct bio_vec *bv; char *dst, *cda; unsigned int blksize, blk_per_trk, off; sector_t recid; - int i, status; + int status; if (!dasd_page_cache) goto out; @@ -1346,7 +1343,7 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) ccw++; if (private->uses_cdl == 0 || recid > 2*blk_per_trk) ccw++; - rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; for (off = 0; off < bv->bv_len; off += blksize) { /* Skip locate record. */ diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c index da16ead..119b8d2 100644 --- a/drivers/s390/block/dasd_fba.c +++ b/drivers/s390/block/dasd_fba.c @@ -234,14 +234,13 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) struct LO_fba_data *LO_data; struct dasd_ccw_req *cqr; struct ccw1 *ccw; - struct bio *bio; + struct req_iterator iter; struct bio_vec *bv; char *dst; int count, cidaw, cplength, datasize; sector_t recid, first_rec, last_rec; unsigned int blksize, off; unsigned char cmd; - int i; private = (struct dasd_fba_private *) device->private; if (rq_data_dir(req) == READ) { @@ -257,8 +256,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) /* Check struct bio and count the number of blocks for the request. */ count = 0; cidaw = 0; - rq_for_each_bio(bio, req) { - bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { if (bv->bv_len & (blksize - 1)) /* Fba can only do full blocks. */ return ERR_PTR(-EINVAL); @@ -268,7 +266,6 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) bv->bv_len)) cidaw += bv->bv_len / blksize; #endif - } } /* Paranoia. */ if (count != last_rec - first_rec + 1) @@ -304,7 +301,7 @@ dasd_fba_build_cp(struct dasd_device * device, struct request *req) locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); } recid = first_rec; - rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; if (dasd_page_cache) { char *copy = kmem_cache_alloc(dasd_page_cache, @@ -359,11 +356,11 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) { struct dasd_fba_private *private; struct ccw1 *ccw; - struct bio *bio; + struct req_iterator iter; struct bio_vec *bv; char *dst, *cda; unsigned int blksize, off; - int i, status; + int status; if (!dasd_page_cache) goto out; @@ -374,7 +371,7 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) ccw++; if (private->rdc_data.mode.bits.data_chain != 0) ccw++; - rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, req, iter) { dst = page_address(bv->bv_page) + bv->bv_offset; for (off = 0; off < bv->bv_len; off += blksize) { /* Skip locate record. */ |