linux-kernel - [PATCH] blk-throttle: Make total_nr

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Date:	Mon, 13 Jun 2011 08:54:48 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] blk-throttle: Make total_nr_queued unsigned

cc: Vivek Goyal <vgoyal@...hat.com>

The total of two unsigned values should also be unsigned.

Update throtl_log output to unsigned.
Update total_nr_queued test to non-zero to be the
same as the other total_nr_queued tests.

Signed-off-by: Joe Perches <joe@...ches.com>
---
 block/blk-throttle.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 3689f83..f6a7941 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -142,9 +142,9 @@ static inline struct throtl_grp *tg_of_blkg(struct blkio_group *blkg)
 	return NULL;
 }
 
-static inline int total_nr_queued(struct throtl_data *td)
+static inline unsigned int total_nr_queued(struct throtl_data *td)
 {
-	return (td->nr_queued[0] + td->nr_queued[1]);
+	return td->nr_queued[0] + td->nr_queued[1];
 }
 
 static inline struct throtl_grp *throtl_ref_get_tg(struct throtl_grp *tg)
@@ -927,7 +927,7 @@ static int throtl_dispatch(struct request_queue *q)
 
 	bio_list_init(&bio_list_on_stack);
 
-	throtl_log(td, "dispatch nr_queued=%d read=%u write=%u",
+	throtl_log(td, "dispatch nr_queued=%u read=%u write=%u",
 			total_nr_queued(td), td->nr_queued[READ],
 			td->nr_queued[WRITE]);
 
@@ -970,7 +970,7 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
 	struct delayed_work *dwork = &td->throtl_work;
 
 	/* schedule work if limits changed even if no bio is queued */
-	if (total_nr_queued(td) > 0 || td->limits_changed) {
+	if (total_nr_queued(td) || td->limits_changed) {
 		/*
 		 * We might have a work scheduled to be executed in future.
 		 * Cancel that and schedule a new one.
-- 
1.7.6.rc1

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