From b4878f245ec8e168cdd1f170f823a750b7dd4af5 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@suse.de>
Date: Thu, 20 Oct 2005 16:42:29 +0200
Subject: [PATCH] 02/05: update ioscheds to use generic dispatch queue

This patch updates all four ioscheds to use generic dispatch
queue.  There's one behavior change in as-iosched.

* In as-iosched, when force dispatching
  (ELEVATOR_INSERT_BACK), batch_data_dir is reset to REQ_SYNC
  and changed_batch and new_batch are cleared to zero.  This
  prevernts AS from doing incorrect update_write_batch after
  the forced dispatched requests are finished.

* In cfq-iosched, cfqd->rq_in_driver currently counts the
  number of activated (removed) requests to determine
  whether queue-kicking is needed and cfq_max_depth has been
  reached.  With generic dispatch queue, I think counting
  the number of dispatched requests would be more appropriate.

* cfq_max_depth can be lowered to 1 again.

Original from Tejun Heo, modified version applied.

Signed-off-by: Jens Axboe <axboe@suse.de>
---
 drivers/block/deadline-iosched.c | 95 +++++++---------------------------------
 1 file changed, 17 insertions(+), 78 deletions(-)

(limited to 'drivers/block/deadline-iosched.c')

diff --git a/drivers/block/deadline-iosched.c b/drivers/block/deadline-iosched.c
index 52a3ae5289a..07de4d24ddb 100644
--- a/drivers/block/deadline-iosched.c
+++ b/drivers/block/deadline-iosched.c
@@ -50,7 +50,6 @@ struct deadline_data {
 	 * next in sort order. read, write or both are NULL
 	 */
 	struct deadline_rq *next_drq[2];
-	struct list_head *dispatch;	/* driver dispatch queue */
 	struct list_head *hash;		/* request hash */
 	unsigned int batching;		/* number of sequential requests made */
 	sector_t last_sector;		/* head position */
@@ -239,10 +238,9 @@ deadline_del_drq_rb(struct deadline_data *dd, struct deadline_rq *drq)
 			dd->next_drq[data_dir] = rb_entry_drq(rbnext);
 	}
 
-	if (ON_RB(&drq->rb_node)) {
-		rb_erase(&drq->rb_node, DRQ_RB_ROOT(dd, drq));
-		RB_CLEAR(&drq->rb_node);
-	}
+	BUG_ON(!ON_RB(&drq->rb_node));
+	rb_erase(&drq->rb_node, DRQ_RB_ROOT(dd, drq));
+	RB_CLEAR(&drq->rb_node);
 }
 
 static struct request *
@@ -286,7 +284,7 @@ deadline_find_first_drq(struct deadline_data *dd, int data_dir)
 /*
  * add drq to rbtree and fifo
  */
-static inline void
+static void
 deadline_add_request(struct request_queue *q, struct request *rq)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
@@ -315,14 +313,11 @@ deadline_add_request(struct request_queue *q, struct request *rq)
 static void deadline_remove_request(request_queue_t *q, struct request *rq)
 {
 	struct deadline_rq *drq = RQ_DATA(rq);
+	struct deadline_data *dd = q->elevator->elevator_data;
 
-	if (drq) {
-		struct deadline_data *dd = q->elevator->elevator_data;
-
-		list_del_init(&drq->fifo);
-		deadline_remove_merge_hints(q, drq);
-		deadline_del_drq_rb(dd, drq);
-	}
+	list_del_init(&drq->fifo);
+	deadline_remove_merge_hints(q, drq);
+	deadline_del_drq_rb(dd, drq);
 }
 
 static int
@@ -452,7 +447,7 @@ deadline_move_to_dispatch(struct deadline_data *dd, struct deadline_rq *drq)
 	request_queue_t *q = drq->request->q;
 
 	deadline_remove_request(q, drq->request);
-	list_add_tail(&drq->request->queuelist, dd->dispatch);
+	elv_dispatch_add_tail(q, drq->request);
 }
 
 /*
@@ -502,8 +497,9 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
  * deadline_dispatch_requests selects the best request according to
  * read/write expire, fifo_batch, etc
  */
-static int deadline_dispatch_requests(struct deadline_data *dd)
+static int deadline_dispatch_requests(request_queue_t *q, int force)
 {
+	struct deadline_data *dd = q->elevator->elevator_data;
 	const int reads = !list_empty(&dd->fifo_list[READ]);
 	const int writes = !list_empty(&dd->fifo_list[WRITE]);
 	struct deadline_rq *drq;
@@ -597,65 +593,12 @@ dispatch_request:
 	return 1;
 }
 
-static struct request *deadline_next_request(request_queue_t *q)
-{
-	struct deadline_data *dd = q->elevator->elevator_data;
-	struct request *rq;
-
-	/*
-	 * if there are still requests on the dispatch queue, grab the first one
-	 */
-	if (!list_empty(dd->dispatch)) {
-dispatch:
-		rq = list_entry_rq(dd->dispatch->next);
-		return rq;
-	}
-
-	if (deadline_dispatch_requests(dd))
-		goto dispatch;
-
-	return NULL;
-}
-
-static void
-deadline_insert_request(request_queue_t *q, struct request *rq, int where)
-{
-	struct deadline_data *dd = q->elevator->elevator_data;
-
-	/* barriers must flush the reorder queue */
-	if (unlikely(rq->flags & (REQ_SOFTBARRIER | REQ_HARDBARRIER)
-			&& where == ELEVATOR_INSERT_SORT))
-		where = ELEVATOR_INSERT_BACK;
-
-	switch (where) {
-		case ELEVATOR_INSERT_BACK:
-			while (deadline_dispatch_requests(dd))
-				;
-			list_add_tail(&rq->queuelist, dd->dispatch);
-			break;
-		case ELEVATOR_INSERT_FRONT:
-			list_add(&rq->queuelist, dd->dispatch);
-			break;
-		case ELEVATOR_INSERT_SORT:
-			BUG_ON(!blk_fs_request(rq));
-			deadline_add_request(q, rq);
-			break;
-		default:
-			printk("%s: bad insert point %d\n", __FUNCTION__,where);
-			return;
-	}
-}
-
 static int deadline_queue_empty(request_queue_t *q)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 
-	if (!list_empty(&dd->fifo_list[WRITE])
-	    || !list_empty(&dd->fifo_list[READ])
-	    || !list_empty(dd->dispatch))
-		return 0;
-
-	return 1;
+	return list_empty(&dd->fifo_list[WRITE])
+		&& list_empty(&dd->fifo_list[READ]);
 }
 
 static struct request *
@@ -733,7 +676,6 @@ static int deadline_init_queue(request_queue_t *q, elevator_t *e)
 	INIT_LIST_HEAD(&dd->fifo_list[WRITE]);
 	dd->sort_list[READ] = RB_ROOT;
 	dd->sort_list[WRITE] = RB_ROOT;
-	dd->dispatch = &q->queue_head;
 	dd->fifo_expire[READ] = read_expire;
 	dd->fifo_expire[WRITE] = write_expire;
 	dd->writes_starved = writes_starved;
@@ -748,10 +690,8 @@ static void deadline_put_request(request_queue_t *q, struct request *rq)
 	struct deadline_data *dd = q->elevator->elevator_data;
 	struct deadline_rq *drq = RQ_DATA(rq);
 
-	if (drq) {
-		mempool_free(drq, dd->drq_pool);
-		rq->elevator_private = NULL;
-	}
+	mempool_free(drq, dd->drq_pool);
+	rq->elevator_private = NULL;
 }
 
 static int
@@ -917,9 +857,8 @@ static struct elevator_type iosched_deadline = {
 		.elevator_merge_fn = 		deadline_merge,
 		.elevator_merged_fn =		deadline_merged_request,
 		.elevator_merge_req_fn =	deadline_merged_requests,
-		.elevator_next_req_fn =		deadline_next_request,
-		.elevator_add_req_fn =		deadline_insert_request,
-		.elevator_remove_req_fn =	deadline_remove_request,
+		.elevator_dispatch_fn =		deadline_dispatch_requests,
+		.elevator_add_req_fn =		deadline_add_request,
 		.elevator_queue_empty_fn =	deadline_queue_empty,
 		.elevator_former_req_fn =	deadline_former_request,
 		.elevator_latter_req_fn =	deadline_latter_request,
-- 
cgit v1.2.3-70-g09d2


From 98b11471d72a374f346bec50a00d0887719b85b3 Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Thu, 20 Oct 2005 16:46:54 +0200
Subject: [PATCH] 04/05 remove last_merge handling from ioscheds

Remove last_merge handling from all ioscheds.  This patch
removes merging capability of noop iosched.

Signed-off-by: Tejun Heo <htejun@gmail.com>
---
 drivers/block/as-iosched.c       | 35 ++++-------------------------------
 drivers/block/cfq-iosched.c      | 26 ++------------------------
 drivers/block/deadline-iosched.c | 30 ++----------------------------
 drivers/block/noop-iosched.c     | 31 -------------------------------
 4 files changed, 8 insertions(+), 114 deletions(-)

(limited to 'drivers/block/deadline-iosched.c')

diff --git a/drivers/block/as-iosched.c b/drivers/block/as-iosched.c
index 1775ffe9edc..5d20e4bcbc7 100644
--- a/drivers/block/as-iosched.c
+++ b/drivers/block/as-iosched.c
@@ -279,14 +279,6 @@ static inline void as_del_arq_hash(struct as_rq *arq)
 		__as_del_arq_hash(arq);
 }
 
-static void as_remove_merge_hints(request_queue_t *q, struct as_rq *arq)
-{
-	as_del_arq_hash(arq);
-
-	if (q->last_merge == arq->request)
-		q->last_merge = NULL;
-}
-
 static void as_add_arq_hash(struct as_data *ad, struct as_rq *arq)
 {
 	struct request *rq = arq->request;
@@ -330,7 +322,7 @@ static struct request *as_find_arq_hash(struct as_data *ad, sector_t offset)
 		BUG_ON(!arq->on_hash);
 
 		if (!rq_mergeable(__rq)) {
-			as_remove_merge_hints(ad->q, arq);
+			as_del_arq_hash(arq);
 			continue;
 		}
 
@@ -1040,7 +1032,7 @@ static void as_remove_queued_request(request_queue_t *q, struct request *rq)
 		ad->next_arq[data_dir] = as_find_next_arq(ad, arq);
 
 	list_del_init(&arq->fifo);
-	as_remove_merge_hints(q, arq);
+	as_del_arq_hash(arq);
 	as_del_arq_rb(ad, arq);
 }
 
@@ -1351,7 +1343,7 @@ as_add_aliased_request(struct as_data *ad, struct as_rq *arq, struct as_rq *alia
 	/*
 	 * Don't want to have to handle merges.
 	 */
-	as_remove_merge_hints(ad->q, arq);
+	as_del_arq_hash(arq);
 }
 
 /*
@@ -1392,12 +1384,8 @@ static void as_add_request(request_queue_t *q, struct request *rq)
 		arq->expires = jiffies + ad->fifo_expire[data_dir];
 		list_add_tail(&arq->fifo, &ad->fifo_list[data_dir]);
 
-		if (rq_mergeable(arq->request)) {
+		if (rq_mergeable(arq->request))
 			as_add_arq_hash(ad, arq);
-
-			if (!ad->q->last_merge)
-				ad->q->last_merge = arq->request;
-		}
 		as_update_arq(ad, arq); /* keep state machine up to date */
 
 	} else {
@@ -1486,15 +1474,6 @@ as_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	struct request *__rq;
 	int ret;
 
-	/*
-	 * try last_merge to avoid going to hash
-	 */
-	ret = elv_try_last_merge(q, bio);
-	if (ret != ELEVATOR_NO_MERGE) {
-		__rq = q->last_merge;
-		goto out_insert;
-	}
-
 	/*
 	 * see if the merge hash can satisfy a back merge
 	 */
@@ -1523,9 +1502,6 @@ as_merge(request_queue_t *q, struct request **req, struct bio *bio)
 
 	return ELEVATOR_NO_MERGE;
 out:
-	if (rq_mergeable(__rq))
-		q->last_merge = __rq;
-out_insert:
 	if (ret) {
 		if (rq_mergeable(__rq))
 			as_hot_arq_hash(ad, RQ_DATA(__rq));
@@ -1572,9 +1548,6 @@ static void as_merged_request(request_queue_t *q, struct request *req)
 		 * behind the disk head. We currently don't bother adjusting.
 		 */
 	}
-
-	if (arq->on_hash)
-		q->last_merge = req;
 }
 
 static void
diff --git a/drivers/block/cfq-iosched.c b/drivers/block/cfq-iosched.c
index 7b14160e079..62a19ed0443 100644
--- a/drivers/block/cfq-iosched.c
+++ b/drivers/block/cfq-iosched.c
@@ -304,14 +304,6 @@ static inline void cfq_del_crq_hash(struct cfq_rq *crq)
 	hlist_del_init(&crq->hash);
 }
 
-static void cfq_remove_merge_hints(request_queue_t *q, struct cfq_rq *crq)
-{
-	cfq_del_crq_hash(crq);
-
-	if (q->last_merge == crq->request)
-		q->last_merge = NULL;
-}
-
 static inline void cfq_add_crq_hash(struct cfq_data *cfqd, struct cfq_rq *crq)
 {
 	const int hash_idx = CFQ_MHASH_FN(rq_hash_key(crq->request));
@@ -672,7 +664,7 @@ static void cfq_remove_request(struct request *rq)
 
 	list_del_init(&rq->queuelist);
 	cfq_del_crq_rb(crq);
-	cfq_remove_merge_hints(rq->q, crq);
+	cfq_del_crq_hash(crq);
 }
 
 static int
@@ -682,12 +674,6 @@ cfq_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	struct request *__rq;
 	int ret;
 
-	ret = elv_try_last_merge(q, bio);
-	if (ret != ELEVATOR_NO_MERGE) {
-		__rq = q->last_merge;
-		goto out_insert;
-	}
-
 	__rq = cfq_find_rq_hash(cfqd, bio->bi_sector);
 	if (__rq && elv_rq_merge_ok(__rq, bio)) {
 		ret = ELEVATOR_BACK_MERGE;
@@ -702,8 +688,6 @@ cfq_merge(request_queue_t *q, struct request **req, struct bio *bio)
 
 	return ELEVATOR_NO_MERGE;
 out:
-	q->last_merge = __rq;
-out_insert:
 	*req = __rq;
 	return ret;
 }
@@ -722,8 +706,6 @@ static void cfq_merged_request(request_queue_t *q, struct request *req)
 		cfq_update_next_crq(crq);
 		cfq_reposition_crq_rb(cfqq, crq);
 	}
-
-	q->last_merge = req;
 }
 
 static void
@@ -1670,13 +1652,9 @@ static void cfq_insert_request(request_queue_t *q, struct request *rq)
 
 	list_add_tail(&rq->queuelist, &cfqq->fifo);
 
-	if (rq_mergeable(rq)) {
+	if (rq_mergeable(rq))
 		cfq_add_crq_hash(cfqd, crq);
 
-		if (!cfqd->queue->last_merge)
-			cfqd->queue->last_merge = rq;
-	}
-
 	cfq_crq_enqueued(cfqd, cfqq, crq);
 }
 
diff --git a/drivers/block/deadline-iosched.c b/drivers/block/deadline-iosched.c
index 07de4d24ddb..43d93155efb 100644
--- a/drivers/block/deadline-iosched.c
+++ b/drivers/block/deadline-iosched.c
@@ -112,15 +112,6 @@ static inline void deadline_del_drq_hash(struct deadline_rq *drq)
 		__deadline_del_drq_hash(drq);
 }
 
-static void
-deadline_remove_merge_hints(request_queue_t *q, struct deadline_rq *drq)
-{
-	deadline_del_drq_hash(drq);
-
-	if (q->last_merge == drq->request)
-		q->last_merge = NULL;
-}
-
 static inline void
 deadline_add_drq_hash(struct deadline_data *dd, struct deadline_rq *drq)
 {
@@ -299,12 +290,8 @@ deadline_add_request(struct request_queue *q, struct request *rq)
 	drq->expires = jiffies + dd->fifo_expire[data_dir];
 	list_add_tail(&drq->fifo, &dd->fifo_list[data_dir]);
 
-	if (rq_mergeable(rq)) {
+	if (rq_mergeable(rq))
 		deadline_add_drq_hash(dd, drq);
-
-		if (!q->last_merge)
-			q->last_merge = rq;
-	}
 }
 
 /*
@@ -316,8 +303,8 @@ static void deadline_remove_request(request_queue_t *q, struct request *rq)
 	struct deadline_data *dd = q->elevator->elevator_data;
 
 	list_del_init(&drq->fifo);
-	deadline_remove_merge_hints(q, drq);
 	deadline_del_drq_rb(dd, drq);
+	deadline_del_drq_hash(drq);
 }
 
 static int
@@ -327,15 +314,6 @@ deadline_merge(request_queue_t *q, struct request **req, struct bio *bio)
 	struct request *__rq;
 	int ret;
 
-	/*
-	 * try last_merge to avoid going to hash
-	 */
-	ret = elv_try_last_merge(q, bio);
-	if (ret != ELEVATOR_NO_MERGE) {
-		__rq = q->last_merge;
-		goto out_insert;
-	}
-
 	/*
 	 * see if the merge hash can satisfy a back merge
 	 */
@@ -368,8 +346,6 @@ deadline_merge(request_queue_t *q, struct request **req, struct bio *bio)
 
 	return ELEVATOR_NO_MERGE;
 out:
-	q->last_merge = __rq;
-out_insert:
 	if (ret)
 		deadline_hot_drq_hash(dd, RQ_DATA(__rq));
 	*req = __rq;
@@ -394,8 +370,6 @@ static void deadline_merged_request(request_queue_t *q, struct request *req)
 		deadline_del_drq_rb(dd, drq);
 		deadline_add_drq_rb(dd, drq);
 	}
-
-	q->last_merge = req;
 }
 
 static void
diff --git a/drivers/block/noop-iosched.c b/drivers/block/noop-iosched.c
index bc2252b6f2e..f56b8edb06e 100644
--- a/drivers/block/noop-iosched.c
+++ b/drivers/block/noop-iosched.c
@@ -7,38 +7,9 @@
 #include <linux/module.h>
 #include <linux/init.h>
 
-/*
- * See if we can find a request that this buffer can be coalesced with.
- */
-static int elevator_noop_merge(request_queue_t *q, struct request **req,
-			       struct bio *bio)
-{
-	int ret;
-
-	ret = elv_try_last_merge(q, bio);
-	if (ret != ELEVATOR_NO_MERGE)
-		*req = q->last_merge;
-
-	return ret;
-}
-
-static void elevator_noop_merge_requests(request_queue_t *q, struct request *req,
-					 struct request *next)
-{
-	list_del_init(&next->queuelist);
-}
-
 static void elevator_noop_add_request(request_queue_t *q, struct request *rq)
 {
 	elv_dispatch_add_tail(q, rq);
-
-	/*
-	 * new merges must not precede this barrier
-	 */
-	if (rq->flags & REQ_HARDBARRIER)
-		q->last_merge = NULL;
-	else if (!q->last_merge)
-		q->last_merge = rq;
 }
 
 static int elevator_noop_dispatch(request_queue_t *q, int force)
@@ -48,8 +19,6 @@ static int elevator_noop_dispatch(request_queue_t *q, int force)
 
 static struct elevator_type elevator_noop = {
 	.ops = {
-		.elevator_merge_fn		= elevator_noop_merge,
-		.elevator_merge_req_fn		= elevator_noop_merge_requests,
 		.elevator_dispatch_fn		= elevator_noop_dispatch,
 		.elevator_add_req_fn		= elevator_noop_add_request,
 	},
-- 
cgit v1.2.3-70-g09d2


From 8267e268e0914ac9371d07f711fcf20cc572993c Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Fri, 21 Oct 2005 03:20:53 -0400
Subject: [PATCH] gfp_t: block layer core

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 drivers/block/as-iosched.c       |  2 +-
 drivers/block/cfq-iosched.c      |  8 ++++----
 drivers/block/deadline-iosched.c |  2 +-
 drivers/block/elevator.c         |  2 +-
 drivers/block/ll_rw_blk.c        | 16 ++++++++--------
 include/linux/blkdev.h           | 14 +++++++-------
 include/linux/elevator.h         |  4 ++--
 7 files changed, 24 insertions(+), 24 deletions(-)

(limited to 'drivers/block/deadline-iosched.c')

diff --git a/drivers/block/as-iosched.c b/drivers/block/as-iosched.c
index 95c0a3690b0..1f08e14697e 100644
--- a/drivers/block/as-iosched.c
+++ b/drivers/block/as-iosched.c
@@ -1807,7 +1807,7 @@ static void as_put_request(request_queue_t *q, struct request *rq)
 }
 
 static int as_set_request(request_queue_t *q, struct request *rq,
-			  struct bio *bio, int gfp_mask)
+			  struct bio *bio, gfp_t gfp_mask)
 {
 	struct as_data *ad = q->elevator->elevator_data;
 	struct as_rq *arq = mempool_alloc(ad->arq_pool, gfp_mask);
diff --git a/drivers/block/cfq-iosched.c b/drivers/block/cfq-iosched.c
index cd056e7e64e..d3bfe8cfb03 100644
--- a/drivers/block/cfq-iosched.c
+++ b/drivers/block/cfq-iosched.c
@@ -1422,7 +1422,7 @@ static void cfq_exit_io_context(struct cfq_io_context *cic)
 }
 
 static struct cfq_io_context *
-cfq_alloc_io_context(struct cfq_data *cfqd, int gfp_mask)
+cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
 {
 	struct cfq_io_context *cic = kmem_cache_alloc(cfq_ioc_pool, gfp_mask);
 
@@ -1517,7 +1517,7 @@ static int cfq_ioc_set_ioprio(struct io_context *ioc, unsigned int ioprio)
 
 static struct cfq_queue *
 cfq_get_queue(struct cfq_data *cfqd, unsigned int key, unsigned short ioprio,
-	      int gfp_mask)
+	      gfp_t gfp_mask)
 {
 	const int hashval = hash_long(key, CFQ_QHASH_SHIFT);
 	struct cfq_queue *cfqq, *new_cfqq = NULL;
@@ -1578,7 +1578,7 @@ out:
  * cfqq, so we don't need to worry about it disappearing
  */
 static struct cfq_io_context *
-cfq_get_io_context(struct cfq_data *cfqd, pid_t pid, int gfp_mask)
+cfq_get_io_context(struct cfq_data *cfqd, pid_t pid, gfp_t gfp_mask)
 {
 	struct io_context *ioc = NULL;
 	struct cfq_io_context *cic;
@@ -2075,7 +2075,7 @@ static void cfq_put_request(request_queue_t *q, struct request *rq)
  */
 static int
 cfq_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
-		int gfp_mask)
+		gfp_t gfp_mask)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct task_struct *tsk = current;
diff --git a/drivers/block/deadline-iosched.c b/drivers/block/deadline-iosched.c
index 52a3ae5289a..753546ba226 100644
--- a/drivers/block/deadline-iosched.c
+++ b/drivers/block/deadline-iosched.c
@@ -756,7 +756,7 @@ static void deadline_put_request(request_queue_t *q, struct request *rq)
 
 static int
 deadline_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
-		     int gfp_mask)
+		     gfp_t gfp_mask)
 {
 	struct deadline_data *dd = q->elevator->elevator_data;
 	struct deadline_rq *drq;
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c
index 98f0126a2de..c744d2a1306 100644
--- a/drivers/block/elevator.c
+++ b/drivers/block/elevator.c
@@ -487,7 +487,7 @@ struct request *elv_former_request(request_queue_t *q, struct request *rq)
 }
 
 int elv_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
-		    int gfp_mask)
+		    gfp_t gfp_mask)
 {
 	elevator_t *e = q->elevator;
 
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index baedac52294..0f64ee7d8d2 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -1652,13 +1652,13 @@ static int blk_init_free_list(request_queue_t *q)
 
 static int __make_request(request_queue_t *, struct bio *);
 
-request_queue_t *blk_alloc_queue(int gfp_mask)
+request_queue_t *blk_alloc_queue(gfp_t gfp_mask)
 {
 	return blk_alloc_queue_node(gfp_mask, -1);
 }
 EXPORT_SYMBOL(blk_alloc_queue);
 
-request_queue_t *blk_alloc_queue_node(int gfp_mask, int node_id)
+request_queue_t *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
 {
 	request_queue_t *q;
 
@@ -1787,7 +1787,7 @@ static inline void blk_free_request(request_queue_t *q, struct request *rq)
 }
 
 static inline struct request *
-blk_alloc_request(request_queue_t *q, int rw, struct bio *bio, int gfp_mask)
+blk_alloc_request(request_queue_t *q, int rw, struct bio *bio, gfp_t gfp_mask)
 {
 	struct request *rq = mempool_alloc(q->rq.rq_pool, gfp_mask);
 
@@ -1885,7 +1885,7 @@ static void freed_request(request_queue_t *q, int rw)
  * Returns !NULL on success, with queue_lock *not held*.
  */
 static struct request *get_request(request_queue_t *q, int rw, struct bio *bio,
-				   int gfp_mask)
+				   gfp_t gfp_mask)
 {
 	struct request *rq = NULL;
 	struct request_list *rl = &q->rq;
@@ -2019,7 +2019,7 @@ static struct request *get_request_wait(request_queue_t *q, int rw,
 	return rq;
 }
 
-struct request *blk_get_request(request_queue_t *q, int rw, int gfp_mask)
+struct request *blk_get_request(request_queue_t *q, int rw, gfp_t gfp_mask)
 {
 	struct request *rq;
 
@@ -2251,7 +2251,7 @@ EXPORT_SYMBOL(blk_rq_unmap_user);
  * @gfp_mask:	memory allocation flags
  */
 int blk_rq_map_kern(request_queue_t *q, struct request *rq, void *kbuf,
-		    unsigned int len, unsigned int gfp_mask)
+		    unsigned int len, gfp_t gfp_mask)
 {
 	struct bio *bio;
 
@@ -3393,7 +3393,7 @@ void exit_io_context(void)
  * but since the current task itself holds a reference, the context can be
  * used in general code, so long as it stays within `current` context.
  */
-struct io_context *current_io_context(int gfp_flags)
+struct io_context *current_io_context(gfp_t gfp_flags)
 {
 	struct task_struct *tsk = current;
 	struct io_context *ret;
@@ -3424,7 +3424,7 @@ EXPORT_SYMBOL(current_io_context);
  *
  * This is always called in the context of the task which submitted the I/O.
  */
-struct io_context *get_io_context(int gfp_flags)
+struct io_context *get_io_context(gfp_t gfp_flags)
 {
 	struct io_context *ret;
 	ret = current_io_context(gfp_flags);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index efdc9b5bc05..1afbdb2d752 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -96,8 +96,8 @@ struct io_context {
 
 void put_io_context(struct io_context *ioc);
 void exit_io_context(void);
-struct io_context *current_io_context(int gfp_flags);
-struct io_context *get_io_context(int gfp_flags);
+struct io_context *current_io_context(gfp_t gfp_flags);
+struct io_context *get_io_context(gfp_t gfp_flags);
 void copy_io_context(struct io_context **pdst, struct io_context **psrc);
 void swap_io_context(struct io_context **ioc1, struct io_context **ioc2);
 
@@ -354,7 +354,7 @@ struct request_queue
 	 * queue needs bounce pages for pages above this limit
 	 */
 	unsigned long		bounce_pfn;
-	unsigned int		bounce_gfp;
+	gfp_t			bounce_gfp;
 
 	/*
 	 * various queue flags, see QUEUE_* below
@@ -550,7 +550,7 @@ extern void generic_make_request(struct bio *bio);
 extern void blk_put_request(struct request *);
 extern void blk_end_sync_rq(struct request *rq);
 extern void blk_attempt_remerge(request_queue_t *, struct request *);
-extern struct request *blk_get_request(request_queue_t *, int, int);
+extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
 extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
 extern void blk_requeue_request(request_queue_t *, struct request *);
 extern void blk_plug_device(request_queue_t *);
@@ -565,7 +565,7 @@ extern void blk_run_queue(request_queue_t *);
 extern void blk_queue_activity_fn(request_queue_t *, activity_fn *, void *);
 extern int blk_rq_map_user(request_queue_t *, struct request *, void __user *, unsigned int);
 extern int blk_rq_unmap_user(struct bio *, unsigned int);
-extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, unsigned int);
+extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, gfp_t);
 extern int blk_rq_map_user_iov(request_queue_t *, struct request *, struct sg_iovec *, int);
 extern int blk_execute_rq(request_queue_t *, struct gendisk *,
 			  struct request *, int);
@@ -654,8 +654,8 @@ extern void blk_wait_queue_drained(request_queue_t *, int);
 extern void blk_finish_queue_drain(request_queue_t *);
 
 int blk_get_queue(request_queue_t *);
-request_queue_t *blk_alloc_queue(int gfp_mask);
-request_queue_t *blk_alloc_queue_node(int,int);
+request_queue_t *blk_alloc_queue(gfp_t);
+request_queue_t *blk_alloc_queue_node(gfp_t, int);
 #define blk_put_queue(q) blk_cleanup_queue((q))
 
 /*
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index ea6bbc2d740..ed93125c1db 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -18,7 +18,7 @@ typedef struct request *(elevator_request_list_fn) (request_queue_t *, struct re
 typedef void (elevator_completed_req_fn) (request_queue_t *, struct request *);
 typedef int (elevator_may_queue_fn) (request_queue_t *, int, struct bio *);
 
-typedef int (elevator_set_req_fn) (request_queue_t *, struct request *, struct bio *, int);
+typedef int (elevator_set_req_fn) (request_queue_t *, struct request *, struct bio *, gfp_t);
 typedef void (elevator_put_req_fn) (request_queue_t *, struct request *);
 typedef void (elevator_deactivate_req_fn) (request_queue_t *, struct request *);
 
@@ -98,7 +98,7 @@ extern int elv_register_queue(request_queue_t *q);
 extern void elv_unregister_queue(request_queue_t *q);
 extern int elv_may_queue(request_queue_t *, int, struct bio *);
 extern void elv_completed_request(request_queue_t *, struct request *);
-extern int elv_set_request(request_queue_t *, struct request *, struct bio *, int);
+extern int elv_set_request(request_queue_t *, struct request *, struct bio *, gfp_t);
 extern void elv_put_request(request_queue_t *, struct request *);
 
 /*
-- 
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