[PATCH 29/32] block/drivers: rm request cmd_flags REQ_OP use

From: mchristi
Date: Wed Nov 04 2015 - 17:12:52 EST

From: Mike Christie <mchristi@xxxxxxxxxx>

With this patch the request struct code no longer uses the
cmd_flags field for REQ_OP operations.

---
block/blk-core.c | 17 +++++++++--------
block/blk-merge.c | 10 ++++++----
block/blk-mq.c | 10 +++++-----
block/cfq-iosched.c | 4 ++--
block/elevator.c | 8 ++++----
drivers/block/loop.c | 2 +-
drivers/block/mtip32xx/mtip32xx.c | 2 +-
drivers/block/nbd.c | 2 +-
drivers/block/nvme-core.c | 6 +++---
drivers/block/rbd.c | 2 +-
drivers/block/skd_main.c | 11 ++++-------
drivers/block/xen-blkfront.c | 8 +++++---
drivers/md/dm.c | 2 +-
drivers/mmc/card/block.c | 7 +++----
drivers/mmc/card/queue.c | 6 ++----
drivers/mmc/card/queue.h | 5 ++++-
drivers/mtd/mtd_blkdevs.c | 2 +-
drivers/scsi/sd.c | 22 ++++++++++++++--------
include/linux/blkdev.h | 26 +++++++++++++-------------
include/linux/elevator.h | 4 ++--
20 files changed, 82 insertions(+), 74 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index e625516..deb8bfd 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -889,10 +889,10 @@ static void __freed_request(struct request_list *rl, int sync)
* A request has just been released. Account for it, update the full and
* congestion status, wake up any waiters. Called under q->queue_lock.
*/
-static void freed_request(struct request_list *rl, unsigned int flags)
+static void freed_request(struct request_list *rl, int op, unsigned int flags)
{
struct request_queue *q = rl->q;
- int sync = rw_is_sync(flags);
+ int sync = rw_is_sync(op, flags);

q->nr_rqs[sync]--;
rl->count[sync]--;
@@ -1005,13 +1005,13 @@ static struct request *__get_request(struct request_list *rl, int op,
struct elevator_type *et = q->elevator->type;
struct io_context *ioc = rq_ioc(bio);
struct io_cq *icq = NULL;
- const bool is_sync = rw_is_sync(op | op_flags) != 0;
+ const bool is_sync = rw_is_sync(op, op_flags) != 0;
int may_queue;

if (unlikely(blk_queue_dying(q)))
return ERR_PTR(-ENODEV);

- may_queue = elv_may_queue(q, op | op_flags);
+ may_queue = elv_may_queue(q, op, op_flags);
if (may_queue == ELV_MQUEUE_NO)
goto rq_starved;

@@ -1141,7 +1141,7 @@ fail_alloc:
* queue, but this is pretty rare.
*/
spin_lock_irq(q->queue_lock);
- freed_request(rl, op | op_flags);
+ freed_request(rl, op, op_flags);

/*
* in the very unlikely event that allocation failed and no
@@ -1175,7 +1175,7 @@ static struct request *get_request(struct request_queue *q, int op,
int op_flags, struct bio *bio,
gfp_t gfp_mask)
{
- const bool is_sync = rw_is_sync(op | op_flags) != 0;
+ const bool is_sync = rw_is_sync(op, op_flags) != 0;
DEFINE_WAIT(wait);
struct request_list *rl;
struct request *rq;
@@ -1424,13 +1424,14 @@ void __blk_put_request(struct request_queue *q, struct request *req)
*/
if (req->cmd_flags & REQ_ALLOCED) {
unsigned int flags = req->cmd_flags;
+ int op = req->op;
struct request_list *rl = blk_rq_rl(req);

BUG_ON(!list_empty(&req->queuelist));
BUG_ON(ELV_ON_HASH(req));

blk_free_request(rl, req);
- freed_request(rl, flags);
+ freed_request(rl, op, flags);
blk_put_rl(rl);
}
}
@@ -2054,7 +2055,7 @@ int blk_rq_check_limits(struct request_queue *q, struct request *rq)
if (!rq_mergeable(rq))
return 0;

- if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->cmd_flags)) {
+ if (blk_rq_sectors(rq) > blk_queue_get_max_sectors(q, rq->op)) {
printk(KERN_ERR "%s: over max size limit.\n", __func__);
return -EIO;
}
diff --git a/block/blk-merge.c b/block/blk-merge.c
index fe00d94..ec42c7e 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -582,7 +582,8 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (!rq_mergeable(req) || !rq_mergeable(next))
return 0;

- if (!blk_check_merge_flags(req->cmd_flags, next->cmd_flags))
+ if (!blk_check_merge_flags(req->cmd_flags, req->op, next->cmd_flags,
+ next->op))
return 0;

/*
@@ -596,7 +597,7 @@ static int attempt_merge(struct request_queue *q, struct request *req,
|| req_no_special_merge(next))
return 0;

- if (req->cmd_flags & REQ_WRITE_SAME &&
+ if (req->op == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(req->bio, next->bio))
return 0;

@@ -684,7 +685,8 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
if (!rq_mergeable(rq) || !bio_mergeable(bio))
return false;

- if (!blk_check_merge_flags(rq->cmd_flags, bio->bi_rw))
+ if (!blk_check_merge_flags(rq->cmd_flags, rq->op, bio->bi_rw,
+ bio->bi_op))
return false;

/* different data direction or already started, don't merge */
@@ -700,7 +702,7 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
return false;

/* must be using the same buffer */
- if (rq->cmd_flags & REQ_WRITE_SAME &&
+ if (rq->op == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(rq->bio, bio))
return false;

diff --git a/block/blk-mq.c b/block/blk-mq.c
index d57a581..b7352ad 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -187,7 +187,7 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->q = q;
rq->mq_ctx = ctx;
rq->op = op;
- rq->cmd_flags |= op | op_flags;
+ rq->cmd_flags |= op_flags;
/* do not touch atomic flags, it needs atomic ops against the timer */
rq->cpu = -1;
INIT_HLIST_NODE(&rq->hash);
@@ -222,7 +222,7 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->end_io_data = NULL;
rq->next_rq = NULL;

- ctx->rq_dispatched[rw_is_sync(op | op_flags)]++;
+ ctx->rq_dispatched[rw_is_sync(op, op_flags)]++;
}

static struct request *
@@ -1187,7 +1187,7 @@ static struct request *blk_mq_map_request(struct request_queue *q,
ctx = blk_mq_get_ctx(q);
hctx = q->mq_ops->map_queue(q, ctx->cpu);

- if (rw_is_sync(bio->bi_rw))
+ if (rw_is_sync(bio->bi_op, bio->bi_rw))
op_flags |= REQ_SYNC;

trace_block_getrq(q, bio, op);
@@ -1253,7 +1253,7 @@ static int blk_mq_direct_issue_request(struct request *rq)
*/
static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
- const int is_sync = rw_is_sync(bio->bi_rw);
+ const int is_sync = rw_is_sync(bio->bi_op, bio->bi_rw);
const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
struct blk_map_ctx data;
struct request *rq;
@@ -1341,7 +1341,7 @@ run_queue:
*/
static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
{
- const int is_sync = rw_is_sync(bio->bi_rw);
+ const int is_sync = rw_is_sync(bio->bi_op, bio->bi_rw);
const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
struct blk_plug *plug;
unsigned int request_count = 0;
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index dbc3da4..fc964e1 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -4271,7 +4271,7 @@ static inline int __cfq_may_queue(struct cfq_queue *cfqq)
return ELV_MQUEUE_MAY;
}

-static int cfq_may_queue(struct request_queue *q, int rw)
+static int cfq_may_queue(struct request_queue *q, int op, int op_flags)
{
struct cfq_data *cfqd = q->elevator->elevator_data;
struct task_struct *tsk = current;
@@ -4288,7 +4288,7 @@ static int cfq_may_queue(struct request_queue *q, int rw)
if (!cic)
return ELV_MQUEUE_MAY;

- cfqq = cic_to_cfqq(cic, rw_is_sync(rw));
+ cfqq = cic_to_cfqq(cic, rw_is_sync(op, op_flags));
if (cfqq) {
cfq_init_prio_data(cfqq, cic);

diff --git a/block/elevator.c b/block/elevator.c
index 84d6394..1624d48 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -366,8 +366,8 @@ void elv_dispatch_sort(struct request_queue *q, struct request *rq)
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);

- if ((rq->cmd_flags & REQ_DISCARD) !=
- (pos->cmd_flags & REQ_DISCARD))
+ if ((rq->op == REQ_OP_DISCARD) !=
+ (pos->op == REQ_OP_DISCARD))
break;
if (rq_data_dir(rq) != rq_data_dir(pos))
break;
@@ -717,12 +717,12 @@ void elv_put_request(struct request_queue *q, struct request *rq)
e->type->ops.elevator_put_req_fn(rq);
}

-int elv_may_queue(struct request_queue *q, int rw)
+int elv_may_queue(struct request_queue *q, int op, int op_flags)
{
struct elevator_queue *e = q->elevator;

if (e->type->ops.elevator_may_queue_fn)
- return e->type->ops.elevator_may_queue_fn(q, rw);
+ return e->type->ops.elevator_may_queue_fn(q, op, op_flags);

return ELV_MQUEUE_MAY;
}
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index e214936..bddffed 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -399,7 +399,7 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
if (rq_data_dir(rq) == WRITE) {
if (rq->cmd_flags & REQ_FLUSH)
ret = lo_req_flush(lo, rq);
- else if (rq->cmd_flags & REQ_DISCARD)
+ else if (rq->op == REQ_OP_DISCARD)
ret = lo_discard(lo, rq, pos);
else if (lo->transfer)
ret = lo_write_transfer(lo, rq, pos);
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index f504232..a3f1b7a 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3677,7 +3677,7 @@ static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
return -ENXIO;
}

- if (rq->cmd_flags & REQ_DISCARD) {
+ if (rq->op == REQ_OP_DISCARD) {
int err;

err = mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 1b87623..2d24c1a 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -242,7 +242,7 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)

if (req->cmd_type == REQ_TYPE_DRV_PRIV)
type = NBD_CMD_DISC;
- else if (req->cmd_flags & REQ_DISCARD)
+ else if (req->op == REQ_OP_DISCARD)
type = NBD_CMD_TRIM;
else if (req->cmd_flags & REQ_FLUSH)
type = NBD_CMD_FLUSH;
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index ccc0c1f..aeba59e 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -440,7 +440,7 @@ __nvme_alloc_iod(unsigned nseg, unsigned bytes, struct nvme_dev *dev,
static struct nvme_iod *nvme_alloc_iod(struct request *rq, struct nvme_dev *dev,
gfp_t gfp)
{
- unsigned size = !(rq->cmd_flags & REQ_DISCARD) ? blk_rq_bytes(rq) :
+ unsigned size = !(rq->op == REQ_OP_DISCARD) ? blk_rq_bytes(rq) :
sizeof(struct nvme_dsm_range);
struct nvme_iod *iod;

@@ -877,7 +877,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
if (!iod)
return BLK_MQ_RQ_QUEUE_BUSY;

- if (req->cmd_flags & REQ_DISCARD) {
+ if (req->op == REQ_OP_DISCARD) {
void *range;
/*
* We reuse the small pool to allocate the 16-byte range here
@@ -927,7 +927,7 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
spin_lock_irq(&nvmeq->q_lock);
if (req->cmd_type == REQ_TYPE_DRV_PRIV)
nvme_submit_priv(nvmeq, req, iod);
- else if (req->cmd_flags & REQ_DISCARD)
+ else if (req->op == REQ_OP_DISCARD)
nvme_submit_discard(nvmeq, ns, req, iod);
else if (req->cmd_flags & REQ_FLUSH)
nvme_submit_flush(nvmeq, ns, req->tag);
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 39104ca..5ee8abe 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3375,7 +3375,7 @@ static void rbd_queue_workfn(struct work_struct *work)
goto err;
}

- if (rq->cmd_flags & REQ_DISCARD)
+ if (rq->op == REQ_OP_DISCARD)
op_type = OBJ_OP_DISCARD;
else if (rq_data_dir(rq) == WRITE)
op_type = OBJ_OP_WRITE;
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 586f916..f89a0c8 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -576,7 +576,6 @@ static void skd_request_fn(struct request_queue *q)
struct request *req = NULL;
struct skd_scsi_request *scsi_req;
struct page *page;
- unsigned long io_flags;
int error;
u32 lba;
u32 count;
@@ -624,12 +623,11 @@ static void skd_request_fn(struct request_queue *q)
lba = (u32)blk_rq_pos(req);
count = blk_rq_sectors(req);
data_dir = rq_data_dir(req);
- io_flags = req->cmd_flags;

- if (io_flags & REQ_FLUSH)
+ if (req->cmd_flags & REQ_FLUSH)
flush++;

- if (io_flags & REQ_FUA)
+ if (req->cmd_flags & REQ_FUA)
fua++;

pr_debug("%s:%s:%d new req=%p lba=%u(0x%x) "
@@ -735,7 +733,7 @@ static void skd_request_fn(struct request_queue *q)
else
skreq->sg_data_dir = SKD_DATA_DIR_HOST_TO_CARD;

- if (io_flags & REQ_DISCARD) {
+ if (req->op == REQ_OP_DISCARD) {
page = alloc_page(GFP_ATOMIC | __GFP_ZERO);
if (!page) {
pr_err("request_fn:Page allocation failed.\n");
@@ -852,9 +850,8 @@ static void skd_end_request(struct skd_device *skdev,
struct skd_request_context *skreq, int error)
{
struct request *req = skreq->req;
- unsigned int io_flags = req->cmd_flags;

- if ((io_flags & REQ_DISCARD) &&
+ if ((req->op == REQ_OP_DISCARD) &&
(skreq->discard_page == 1)) {
pr_debug("%s:%s:%d, free the page!",
skdev->name, __func__, __LINE__);
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index ec76178..91eccd1 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -452,7 +452,8 @@ static int blkif_queue_request(struct request *req)
id = get_id_from_freelist(info);
info->shadow[id].request = req;

- if (unlikely(req->cmd_flags & (REQ_DISCARD | REQ_SECURE))) {
+ if (unlikely(req->op == REQ_OP_DISCARD ||
+ req->cmd_flags & REQ_SECURE)) {
ring_req->operation = BLKIF_OP_DISCARD;
ring_req->u.discard.nr_sectors = blk_rq_sectors(req);
ring_req->u.discard.id = id;
@@ -1533,8 +1534,9 @@ static int blkif_recover(struct blkfront_info *info)
/*
* Get the bios in the request so we can re-queue them.
*/
- if (copy[i].request->cmd_flags &
- (REQ_FLUSH | REQ_FUA | REQ_DISCARD | REQ_SECURE)) {
+ if (copy[i].request->cmd_flags & REQ_FLUSH ||
+ copy[i].request->op == REQ_OP_DISCARD ||
+ copy[i].request->cmd_flags & (REQ_FUA | REQ_SECURE)) {
/*
* Flush operations don't contain bios, so
* we need to requeue the whole request
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index ea4bc70..e03ca09 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1245,7 +1245,7 @@ static void dm_done(struct request *clone, int error, bool mapped)
r = rq_end_io(tio->ti, clone, error, &tio->info);
}

- if (unlikely(r == -EREMOTEIO && (clone->cmd_flags & REQ_WRITE_SAME) &&
+ if (unlikely(r == -EREMOTEIO && (clone->op == REQ_OP_WRITE_SAME) &&
!clone->q->limits.max_write_same_sectors))
disable_write_same(tio->md);

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index c742cfd..e99361f 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1613,8 +1613,7 @@ static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
!IS_ALIGNED(blk_rq_sectors(next), 8))
break;

- if (next->cmd_flags & REQ_DISCARD ||
- next->cmd_flags & REQ_FLUSH)
+ if (next->op == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
break;

if (rq_data_dir(cur) != rq_data_dir(next))
@@ -2055,7 +2054,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
}

mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
- if (cmd_flags & REQ_DISCARD) {
+ if (req && req->op == REQ_OP_DISCARD) {
/* complete ongoing async transfer before issuing discard */
if (card->host->areq)
mmc_blk_issue_rw_rq(mq, NULL);
@@ -2079,7 +2078,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)

out:
if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
- (cmd_flags & MMC_REQ_SPECIAL_MASK))
+ mmc_req_is_special(req))
/*
* Release host when there are no more requests
* and after special request(discard, flush) is done.
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 6f4323c..9fb8d21 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -33,7 +33,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
/*
* We only like normal block requests and discards.
*/
- if (req->cmd_type != REQ_TYPE_FS && !(req->cmd_flags & REQ_DISCARD)) {
+ if (req->cmd_type != REQ_TYPE_FS && req->op != REQ_OP_DISCARD) {
blk_dump_rq_flags(req, "MMC bad request");
return BLKPREP_KILL;
}
@@ -56,7 +56,6 @@ static int mmc_queue_thread(void *d)
down(&mq->thread_sem);
do {
struct request *req = NULL;
- unsigned int cmd_flags = 0;

spin_lock_irq(q->queue_lock);
set_current_state(TASK_INTERRUPTIBLE);
@@ -66,7 +65,6 @@ static int mmc_queue_thread(void *d)

if (req || mq->mqrq_prev->req) {
set_current_state(TASK_RUNNING);
- cmd_flags = req ? req->cmd_flags : 0;
mq->issue_fn(mq, req);
cond_resched();
if (mq->flags & MMC_QUEUE_NEW_REQUEST) {
@@ -81,7 +79,7 @@ static int mmc_queue_thread(void *d)
* has been finished. Do not assign it to previous
* request.
*/
- if (cmd_flags & MMC_REQ_SPECIAL_MASK)
+ if (mmc_req_is_special(req))
mq->mqrq_cur->req = NULL;

mq->mqrq_prev->brq.mrq.data = NULL;
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 36cddab..f166e5b 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -1,7 +1,10 @@
#ifndef MMC_QUEUE_H
#define MMC_QUEUE_H

-#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH)
+static inline bool mmc_req_is_special(struct request *req)
+{
+ return req && (req->cmd_flags & REQ_FLUSH || req->op == REQ_OP_DISCARD);
+}

struct request;
struct task_struct;
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 44dc965..49017f0 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -94,7 +94,7 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
get_capacity(req->rq_disk))
return -EIO;

- if (req->cmd_flags & REQ_DISCARD)
+ if (req->op == REQ_OP_DISCARD)
return tr->discard(dev, block, nsect);

if (rq_data_dir(req) == READ) {
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 3f37022..353508c 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1122,21 +1122,27 @@ static int sd_init_command(struct scsi_cmnd *cmd)
{
struct request *rq = cmd->request;

- if (rq->cmd_flags & REQ_DISCARD)
+ switch (rq->op) {
+ case REQ_OP_DISCARD:
return sd_setup_discard_cmnd(cmd);
- else if (rq->cmd_flags & REQ_WRITE_SAME)
+ case REQ_OP_WRITE_SAME:
return sd_setup_write_same_cmnd(cmd);
- else if (rq->cmd_flags & REQ_FLUSH)
- return sd_setup_flush_cmnd(cmd);
- else
- return sd_setup_read_write_cmnd(cmd);
+ case REQ_OP_READ:
+ case REQ_OP_WRITE:
+ if (rq->cmd_flags & REQ_FLUSH)
+ return sd_setup_flush_cmnd(cmd);
+ else
+ return sd_setup_read_write_cmnd(cmd);
+ default:
+ BUG();
+ }
}

static void sd_uninit_command(struct scsi_cmnd *SCpnt)
{
struct request *rq = SCpnt->request;

- if (rq->cmd_flags & REQ_DISCARD)
+ if (rq->op == REQ_OP_DISCARD)
__free_page(rq->completion_data);

if (SCpnt->cmnd != rq->cmd) {
@@ -1658,7 +1664,7 @@ static int sd_done(struct scsi_cmnd *SCpnt)
unsigned char op = SCpnt->cmnd[0];
unsigned char unmap = SCpnt->cmnd[1] & 8;

- if (req->cmd_flags & REQ_DISCARD || req->cmd_flags & REQ_WRITE_SAME) {
+ if (req->op == REQ_OP_DISCARD || req->op == REQ_OP_WRITE_SAME) {
if (!result) {
good_bytes = blk_rq_bytes(req);
scsi_set_resid(SCpnt, 0);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4376ec6..d930191 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -618,14 +618,14 @@ static inline unsigned int blk_queue_cluster(struct request_queue *q)
/*
* We regard a request as sync, if either a read or a sync write
*/
-static inline bool rw_is_sync(unsigned int rw_flags)
+static inline bool rw_is_sync(int op, unsigned int rw_flags)
{
- return !(rw_flags & REQ_WRITE) || (rw_flags & REQ_SYNC);
+ return (op_to_data_dir(op) == READ) || (rw_flags & REQ_SYNC);
}

static inline bool rq_is_sync(struct request *rq)
{
- return rw_is_sync(rq->cmd_flags);
+ return rw_is_sync(rq->op, rq->cmd_flags);
}

static inline bool blk_rl_full(struct request_list *rl, bool sync)
@@ -660,16 +660,16 @@ static inline bool rq_mergeable(struct request *rq)
return true;
}

-static inline bool blk_check_merge_flags(unsigned int flags1,
- unsigned int flags2)
+static inline bool blk_check_merge_flags(unsigned int flags1, unsigned int op1,
+ unsigned int flags2, unsigned int op2)
{
- if ((flags1 & REQ_DISCARD) != (flags2 & REQ_DISCARD))
+ if ((op1 == REQ_OP_DISCARD) != (op2 == REQ_OP_DISCARD))
return false;

if ((flags1 & REQ_SECURE) != (flags2 & REQ_SECURE))
return false;

- if ((flags1 & REQ_WRITE_SAME) != (flags2 & REQ_WRITE_SAME))
+ if ((op1 == REQ_OP_WRITE_SAME) != (op2 == REQ_OP_WRITE_SAME))
return false;

return true;
@@ -863,12 +863,12 @@ static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
}

static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
- unsigned int cmd_flags)
+ int op)
{
- if (unlikely(cmd_flags & REQ_DISCARD))
+ if (unlikely(op == REQ_OP_DISCARD))
return min(q->limits.max_discard_sectors, UINT_MAX >> 9);

- if (unlikely(cmd_flags & REQ_WRITE_SAME))
+ if (unlikely(op == REQ_OP_WRITE_SAME))
return q->limits.max_write_same_sectors;

return q->limits.max_sectors;
@@ -895,11 +895,11 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq)
if (unlikely(rq->cmd_type == REQ_TYPE_BLOCK_PC))
return q->limits.max_hw_sectors;

- if (!q->limits.chunk_sectors || (rq->cmd_flags & REQ_DISCARD))
- return blk_queue_get_max_sectors(q, rq->cmd_flags);
+ if (!q->limits.chunk_sectors || (rq->op == REQ_OP_DISCARD))
+ return blk_queue_get_max_sectors(q, rq->op);

return min(blk_max_size_offset(q, blk_rq_pos(rq)),
- blk_queue_get_max_sectors(q, rq->cmd_flags));
+ blk_queue_get_max_sectors(q, rq->op));
}

static inline unsigned int blk_rq_count_bios(struct request *rq)
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 638b324..953d286 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -26,7 +26,7 @@ typedef int (elevator_dispatch_fn) (struct request_queue *, int);
typedef void (elevator_add_req_fn) (struct request_queue *, struct request *);
typedef struct request *(elevator_request_list_fn) (struct request_queue *, struct request *);
typedef void (elevator_completed_req_fn) (struct request_queue *, struct request *);
-typedef int (elevator_may_queue_fn) (struct request_queue *, int);
+typedef int (elevator_may_queue_fn) (struct request_queue *, int, int);

typedef void (elevator_init_icq_fn) (struct io_cq *);
typedef void (elevator_exit_icq_fn) (struct io_cq *);
@@ -134,7 +134,7 @@ extern struct request *elv_former_request(struct request_queue *, struct request
extern struct request *elv_latter_request(struct request_queue *, struct request *);
extern int elv_register_queue(struct request_queue *q);
extern void elv_unregister_queue(struct request_queue *q);
-extern int elv_may_queue(struct request_queue *, int);
+extern int elv_may_queue(struct request_queue *, int, int);
extern void elv_completed_request(struct request_queue *, struct request *);
extern int elv_set_request(struct request_queue *q, struct request *rq,
struct bio *bio, gfp_t gfp_mask);
--
1.8.3.1

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