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authorNeilBrown <neilb@suse.de>2007-09-25 12:35:59 +0200
committerJens Axboe <axboe@carl.home.kernel.dk>2007-10-10 09:25:56 +0200
commit5705f7021748a69d84d6567e68e8851dab551464 (patch)
tree5a6dbc8fc6055c0334f4a97540e36a7844b9c482 /drivers/s390/char
parent9dfa52831e96194b8649613e3131baa2c109f7dc (diff)
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/char')
-rw-r--r--drivers/s390/char/tape_34xx.c15
-rw-r--r--drivers/s390/char/tape_3590.c16
2 files changed, 11 insertions, 20 deletions
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 80e7a537e7d..ea3e6a345c8 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -1134,21 +1134,18 @@ tape_34xx_bread(struct tape_device *device, struct request *req)
{
struct tape_request *request;
struct ccw1 *ccw;
- int count = 0, i;
+ int count = 0;
unsigned off;
char *dst;
struct bio_vec *bv;
- struct bio *bio;
+ struct req_iterator iter;
struct tape_34xx_block_id * start_block;
DBF_EVENT(6, "xBREDid:");
/* Count the number of blocks for the request. */
- rq_for_each_bio(bio, req) {
- bio_for_each_segment(bv, bio, i) {
- count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
- }
- }
+ rq_for_each_segment(bv, req, iter)
+ count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
/* Allocate the ccw request. */
request = tape_alloc_request(3+count+1, 8);
@@ -1175,8 +1172,7 @@ tape_34xx_bread(struct tape_device *device, struct request *req)
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
- rq_for_each_bio(bio, req) {
- bio_for_each_segment(bv, bio, i) {
+ rq_for_each_segment(bv, req, iter) {
dst = kmap(bv->bv_page) + bv->bv_offset;
for (off = 0; off < bv->bv_len;
off += TAPEBLOCK_HSEC_SIZE) {
@@ -1187,7 +1183,6 @@ tape_34xx_bread(struct tape_device *device, struct request *req)
ccw++;
dst += TAPEBLOCK_HSEC_SIZE;
}
- }
}
ccw = tape_ccw_end(ccw, NOP, 0, NULL);
diff --git a/drivers/s390/char/tape_3590.c b/drivers/s390/char/tape_3590.c
index 7e2b2ab4926..b16ad7a7631 100644
--- a/drivers/s390/char/tape_3590.c
+++ b/drivers/s390/char/tape_3590.c
@@ -623,21 +623,19 @@ tape_3590_bread(struct tape_device *device, struct request *req)
{
struct tape_request *request;
struct ccw1 *ccw;
- int count = 0, start_block, i;
+ int count = 0, start_block;
unsigned off;
char *dst;
struct bio_vec *bv;
- struct bio *bio;
+ struct req_iterator iter;
DBF_EVENT(6, "xBREDid:");
start_block = req->sector >> TAPEBLOCK_HSEC_S2B;
DBF_EVENT(6, "start_block = %i\n", start_block);
- rq_for_each_bio(bio, req) {
- bio_for_each_segment(bv, bio, i) {
- count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
- }
- }
+ rq_for_each_segment(bv, req, iter)
+ count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
+
request = tape_alloc_request(2 + count + 1, 4);
if (IS_ERR(request))
return request;
@@ -653,8 +651,7 @@ tape_3590_bread(struct tape_device *device, struct request *req)
*/
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
- 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 += TAPEBLOCK_HSEC_SIZE) {
@@ -667,7 +664,6 @@ tape_3590_bread(struct tape_device *device, struct request *req)
}
if (off > bv->bv_len)
BUG();
- }
}
ccw = tape_ccw_end(ccw, NOP, 0, NULL);
DBF_EVENT(6, "xBREDccwg\n");