From d858f0fd3ee6722931d8ddb259dd1dbd30461c1b Mon Sep 17 00:00:00 2001
From: Thomas Maier <balagi@justmail.de>
Date: Thu, 19 Oct 2006 23:28:15 -0700
Subject: [PATCH] --- yaml --- r: 39951 b: refs/heads/master c:
 79e2de4bc53d7ca2a8eedee49e4a92479b4b530e h: refs/heads/master i:   39949:
 56b39c463918fb0eb9cb15018beb32b358c00e18   39947:
 66b1895d355901192c17b0ebd1aca55dc4d8d592   39943:
 bf2d16fb163789145416c4b69816a4754e1c5d83   39935:
 b6c8e1c1af01857c4703b74ccc9f998722120c20 v: v3

---
 [refs]                       |  2 +-
 trunk/block/ll_rw_blk.c      | 20 ++++++++++----------
 trunk/include/linux/blkdev.h |  2 ++
 3 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/[refs] b/[refs]
index 8492dc0762a0..16043557867a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 26da82058e62ea173559a26881b16d10089645ba
+refs/heads/master: 79e2de4bc53d7ca2a8eedee49e4a92479b4b530e
diff --git a/trunk/block/ll_rw_blk.c b/trunk/block/ll_rw_blk.c
index c847e17e5caa..132a858ce2c5 100644
--- a/trunk/block/ll_rw_blk.c
+++ b/trunk/block/ll_rw_blk.c
@@ -117,7 +117,7 @@ static void blk_queue_congestion_threshold(struct request_queue *q)
  * congested queues, and wake up anyone who was waiting for requests to be
  * put back.
  */
-static void clear_queue_congested(request_queue_t *q, int rw)
+void blk_clear_queue_congested(request_queue_t *q, int rw)
 {
 	enum bdi_state bit;
 	wait_queue_head_t *wqh = &congestion_wqh[rw];
@@ -128,18 +128,20 @@ static void clear_queue_congested(request_queue_t *q, int rw)
 	if (waitqueue_active(wqh))
 		wake_up(wqh);
 }
+EXPORT_SYMBOL(blk_clear_queue_congested);
 
 /*
  * A queue has just entered congestion.  Flag that in the queue's VM-visible
  * state flags and increment the global gounter of congested queues.
  */
-static void set_queue_congested(request_queue_t *q, int rw)
+void blk_set_queue_congested(request_queue_t *q, int rw)
 {
 	enum bdi_state bit;
 
 	bit = (rw == WRITE) ? BDI_write_congested : BDI_read_congested;
 	set_bit(bit, &q->backing_dev_info.state);
 }
+EXPORT_SYMBOL(blk_set_queue_congested);
 
 /**
  * blk_get_backing_dev_info - get the address of a queue's backing_dev_info
@@ -159,7 +161,6 @@ struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev)
 		ret = &q->backing_dev_info;
 	return ret;
 }
-
 EXPORT_SYMBOL(blk_get_backing_dev_info);
 
 void blk_queue_activity_fn(request_queue_t *q, activity_fn *fn, void *data)
@@ -167,7 +168,6 @@ void blk_queue_activity_fn(request_queue_t *q, activity_fn *fn, void *data)
 	q->activity_fn = fn;
 	q->activity_data = data;
 }
-
 EXPORT_SYMBOL(blk_queue_activity_fn);
 
 /**
@@ -2067,7 +2067,7 @@ static void __freed_request(request_queue_t *q, int rw)
 	struct request_list *rl = &q->rq;
 
 	if (rl->count[rw] < queue_congestion_off_threshold(q))
-		clear_queue_congested(q, rw);
+		blk_clear_queue_congested(q, rw);
 
 	if (rl->count[rw] + 1 <= q->nr_requests) {
 		if (waitqueue_active(&rl->wait[rw]))
@@ -2137,7 +2137,7 @@ static struct request *get_request(request_queue_t *q, int rw, struct bio *bio,
 				}
 			}
 		}
-		set_queue_congested(q, rw);
+		blk_set_queue_congested(q, rw);
 	}
 
 	/*
@@ -3765,14 +3765,14 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count)
 	blk_queue_congestion_threshold(q);
 
 	if (rl->count[READ] >= queue_congestion_on_threshold(q))
-		set_queue_congested(q, READ);
+		blk_set_queue_congested(q, READ);
 	else if (rl->count[READ] < queue_congestion_off_threshold(q))
-		clear_queue_congested(q, READ);
+		blk_clear_queue_congested(q, READ);
 
 	if (rl->count[WRITE] >= queue_congestion_on_threshold(q))
-		set_queue_congested(q, WRITE);
+		blk_set_queue_congested(q, WRITE);
 	else if (rl->count[WRITE] < queue_congestion_off_threshold(q))
-		clear_queue_congested(q, WRITE);
+		blk_clear_queue_congested(q, WRITE);
 
 	if (rl->count[READ] >= q->nr_requests) {
 		blk_set_queue_full(q, READ);
diff --git a/trunk/include/linux/blkdev.h b/trunk/include/linux/blkdev.h
index d370d2cfe138..9575e3a5ff2a 100644
--- a/trunk/include/linux/blkdev.h
+++ b/trunk/include/linux/blkdev.h
@@ -651,6 +651,8 @@ extern void blk_recount_segments(request_queue_t *, struct bio *);
 extern int scsi_cmd_ioctl(struct file *, struct gendisk *, unsigned int, void __user *);
 extern int sg_scsi_ioctl(struct file *, struct request_queue *,
 		struct gendisk *, struct scsi_ioctl_command __user *);
+extern void blk_clear_queue_congested(request_queue_t *q, int rw);
+extern void blk_set_queue_congested(request_queue_t *q, int rw);
 extern void blk_start_queue(request_queue_t *q);
 extern void blk_stop_queue(request_queue_t *q);
 extern void blk_sync_queue(struct request_queue *q);