After checking the request_queue argument of funtion blk_execute_rq_nowait, I
now added three more patches, one to remove the same argument from
blk_execute_rq and other two to change the at_head argument from
blk_exeute_rq_{nowait} from int to bool.
Original patch can be checked here[1].
After this patch gets merged, my plan is to analyse the usage the gendisk
argument, is being set as NULL but the majority of callers.
[1]: https://lkml.org/lkml/2019/8/6/31
Marcos Paulo de Souza (4):
block: Remove request_queue argument from blk_execute_rq_nowait
fs/block/drivers: Remove request_queue argument from blk_execute_rq
block: Change at_head argument of blk_execute_rq_nowait to bool
block: Change at_head argument of blk_execute_rq to bool
block/blk-exec.c | 12 ++++--------
block/bsg.c | 2 +-
block/scsi_ioctl.c | 10 +++++-----
drivers/block/mtip32xx/mtip32xx.c | 2 +-
drivers/block/paride/pd.c | 2 +-
drivers/block/pktcdvd.c | 2 +-
drivers/block/sx8.c | 4 ++--
drivers/block/virtio_blk.c | 2 +-
drivers/cdrom/cdrom.c | 2 +-
drivers/ide/ide-atapi.c | 2 +-
drivers/ide/ide-cd.c | 2 +-
drivers/ide/ide-cd_ioctl.c | 2 +-
drivers/ide/ide-devsets.c | 2 +-
drivers/ide/ide-disk.c | 2 +-
drivers/ide/ide-ioctls.c | 4 ++--
drivers/ide/ide-park.c | 2 +-
drivers/ide/ide-pm.c | 4 ++--
drivers/ide/ide-tape.c | 2 +-
drivers/ide/ide-taskfile.c | 2 +-
drivers/mmc/core/block.c | 10 +++++-----
drivers/nvme/host/core.c | 18 +++++++++---------
drivers/nvme/host/lightnvm.c | 6 +++---
drivers/nvme/host/nvme.h | 2 +-
drivers/nvme/host/pci.c | 7 +++----
drivers/scsi/scsi_error.c | 2 +-
drivers/scsi/scsi_lib.c | 2 +-
drivers/scsi/sg.c | 3 +--
drivers/scsi/st.c | 2 +-
drivers/target/target_core_pscsi.c | 5 ++---
fs/nfsd/blocklayout.c | 2 +-
include/linux/blkdev.h | 7 +++----
31 files changed, 60 insertions(+), 68 deletions(-)
--
2.22.0
Commit a1ce35fa4985 ("block: remove dead elevator code") removed code
that was using the request_queue argument. This got simplified by
calling blk_mq_sched_insert_request which already gets the request_queue
from the request being inserted in the scheduler queue for execution.
Signed-off-by: Marcos Paulo de Souza <[email protected]>
---
block/blk-exec.c | 8 +++-----
drivers/block/sx8.c | 4 ++--
drivers/nvme/host/core.c | 4 ++--
drivers/nvme/host/lightnvm.c | 2 +-
drivers/nvme/host/pci.c | 7 +++----
drivers/scsi/scsi_error.c | 2 +-
drivers/scsi/sg.c | 3 +--
drivers/scsi/st.c | 2 +-
drivers/target/target_core_pscsi.c | 5 ++---
include/linux/blkdev.h | 4 ++--
10 files changed, 18 insertions(+), 23 deletions(-)
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 1db44ca0f4a6..80890b0b9c67 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -32,7 +32,6 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t error)
/**
* blk_execute_rq_nowait - insert a request into queue for execution
- * @q: queue to insert the request in
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
@@ -45,9 +44,8 @@ static void blk_end_sync_rq(struct request *rq, blk_status_t error)
* Note:
* This function will invoke @done directly if the queue is dead.
*/
-void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
- struct request *rq, int at_head,
- rq_end_io_fn *done)
+void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq,
+ int at_head, rq_end_io_fn *done)
{
WARN_ON(irqs_disabled());
WARN_ON(!blk_rq_is_passthrough(rq));
@@ -81,7 +79,7 @@ void blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
unsigned long hang_check;
rq->end_io_data = &wait;
- blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
+ blk_execute_rq_nowait(bd_disk, rq, at_head, blk_end_sync_rq);
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index 4478eb7efee0..2cdf2771f8e8 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -539,7 +539,7 @@ static int carm_array_info (struct carm_host *host, unsigned int array_idx)
spin_unlock_irq(&host->lock);
DPRINTK("blk_execute_rq_nowait, tag == %u\n", rq->tag);
- blk_execute_rq_nowait(host->oob_q, NULL, rq, true, NULL);
+ blk_execute_rq_nowait(NULL, rq, true, NULL);
return 0;
@@ -578,7 +578,7 @@ static int carm_send_special (struct carm_host *host, carm_sspc_t func)
crq->msg_bucket = (u32) rc;
DPRINTK("blk_execute_rq_nowait, tag == %u\n", rq->tag);
- blk_execute_rq_nowait(host->oob_q, NULL, rq, true, NULL);
+ blk_execute_rq_nowait(NULL, rq, true, NULL);
return 0;
}
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 8f3fbe5ca937..6682fdcece0f 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -756,7 +756,7 @@ static void nvme_execute_rq_polled(struct request_queue *q,
rq->cmd_flags |= REQ_HIPRI;
rq->end_io_data = &wait;
- blk_execute_rq_nowait(q, bd_disk, rq, at_head, nvme_end_sync_rq);
+ blk_execute_rq_nowait(bd_disk, rq, at_head, nvme_end_sync_rq);
while (!completion_done(&wait)) {
blk_poll(q, request_to_qc_t(rq->mq_hctx, rq), true);
@@ -941,7 +941,7 @@ static int nvme_keep_alive(struct nvme_ctrl *ctrl)
rq->timeout = ctrl->kato * HZ;
rq->end_io_data = ctrl;
- blk_execute_rq_nowait(rq->q, NULL, rq, 0, nvme_keep_alive_end_io);
+ blk_execute_rq_nowait(NULL, rq, 0, nvme_keep_alive_end_io);
return 0;
}
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
index ba009d4c9dfa..5d0e330e86d0 100644
--- a/drivers/nvme/host/lightnvm.c
+++ b/drivers/nvme/host/lightnvm.c
@@ -685,7 +685,7 @@ static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd)
rq->end_io_data = rqd;
- blk_execute_rq_nowait(q, NULL, rq, 0, nvme_nvm_end_io);
+ blk_execute_rq_nowait(NULL, rq, 0, nvme_nvm_end_io);
return 0;
}
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index db160cee42ad..d8f83696b4ba 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1332,7 +1332,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
abort_req->timeout = ADMIN_TIMEOUT;
abort_req->end_io_data = NULL;
- blk_execute_rq_nowait(abort_req->q, NULL, abort_req, 0, abort_endio);
+ blk_execute_rq_nowait(NULL, abort_req, 0, abort_endio);
/*
* The aborted req will be completed on receiving the abort req.
@@ -2205,9 +2205,8 @@ static int nvme_delete_queue(struct nvme_queue *nvmeq, u8 opcode)
req->end_io_data = nvmeq;
init_completion(&nvmeq->delete_done);
- blk_execute_rq_nowait(q, NULL, req, false,
- opcode == nvme_admin_delete_cq ?
- nvme_del_cq_end : nvme_del_queue_end);
+ blk_execute_rq_nowait(NULL, req, false,
+ opcode == nvme_admin_delete_cq ? nvme_del_cq_end : nvme_del_queue_end);
return 0;
}
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 1c470e31ae81..49cda23c7fb8 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1988,7 +1988,7 @@ static void scsi_eh_lock_door(struct scsi_device *sdev)
req->timeout = 10 * HZ;
rq->retries = 5;
- blk_execute_rq_nowait(req->q, NULL, req, 1, eh_lock_door_done);
+ blk_execute_rq_nowait(NULL, req, 1, eh_lock_door_done);
}
/**
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index cce757506383..81ece3ed0474 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -835,8 +835,7 @@ sg_common_write(Sg_fd * sfp, Sg_request * srp,
srp->rq->timeout = timeout;
kref_get(&sfp->f_ref); /* sg_rq_end_io() does kref_put(). */
- blk_execute_rq_nowait(sdp->device->request_queue, sdp->disk,
- srp->rq, at_head, sg_rq_end_io);
+ blk_execute_rq_nowait(sdp->disk, srp->rq, at_head, sg_rq_end_io);
return 0;
}
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index e3266a64a477..3b828f260294 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -583,7 +583,7 @@ static int st_scsi_execute(struct st_request *SRpnt, const unsigned char *cmd,
rq->retries = retries;
req->end_io_data = SRpnt;
- blk_execute_rq_nowait(req->q, NULL, req, 1, st_scsi_execute_end);
+ blk_execute_rq_nowait(NULL, req, 1, st_scsi_execute_end);
return 0;
}
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index c9d92b3e777d..021212569d1b 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -1000,9 +1000,8 @@ pscsi_execute_cmd(struct se_cmd *cmd)
req->timeout = PS_TIMEOUT_OTHER;
scsi_req(req)->retries = PS_RETRY;
- blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
- (cmd->sam_task_attr == TCM_HEAD_TAG),
- pscsi_req_done);
+ blk_execute_rq_nowait(NULL, req, (cmd->sam_task_attr == TCM_HEAD_TAG),
+ pscsi_req_done);
return 0;
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 1ef375dafb1c..8e8f088c75a5 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -867,8 +867,8 @@ extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
gfp_t);
extern void blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
-extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
- struct request *, int, rq_end_io_fn *);
+extern void blk_execute_rq_nowait(struct gendisk *, struct request *, int,
+ rq_end_io_fn *);
/* Helper to convert REQ_OP_XXX to its string format XXX */
extern const char *blk_op_str(unsigned int op);
--
2.22.0
On 8/9/19 3:54 AM, Marcos Paulo de Souza wrote:
> After checking the request_queue argument of funtion blk_execute_rq_nowait, I
> now added three more patches, one to remove the same argument from
> blk_execute_rq and other two to change the at_head argument from
> blk_exeute_rq_{nowait} from int to bool.
>
> Original patch can be checked here[1].
>
> After this patch gets merged, my plan is to analyse the usage the gendisk
> argument, is being set as NULL but the majority of callers.
>
> [1]: https://lkml.org/lkml/2019/8/6/31
Don't ever send something out that hasn't even been compiled. I already
detest doing kernel-wide cleanup changes like this, but when I do, I
need absolute confidence in it actually being tested. The fact that it
hasn't even been compiled is a big black mark on the submitter.
--
Jens Axboe
On Sun, Aug 11, 2019 at 07:47:17AM -0600, Jens Axboe wrote:
> On 8/9/19 3:54 AM, Marcos Paulo de Souza wrote:
> > After checking the request_queue argument of funtion blk_execute_rq_nowait, I
> > now added three more patches, one to remove the same argument from
> > blk_execute_rq and other two to change the at_head argument from
> > blk_exeute_rq_{nowait} from int to bool.
> >
> > Original patch can be checked here[1].
> >
> > After this patch gets merged, my plan is to analyse the usage the gendisk
> > argument, is being set as NULL but the majority of callers.
> >
> > [1]: https://lkml.org/lkml/2019/8/6/31
>
> Don't ever send something out that hasn't even been compiled. I already
> detest doing kernel-wide cleanup changes like this, but when I do, I
> need absolute confidence in it actually being tested. The fact that it
> hasn't even been compiled is a big black mark on the submitter.
My bad. I compiled the code locally and tested in VM, but later on I removed
the semicolon by mistake while reviewing the changes once more and the code
was commited without the semicolon. I'm improving my setup (scripts
and whatnot) to avoid this happening again in the future.
>
> --
> Jens Axboe
>