From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk, vgoyal@redhat.com, jgarzik@pobox.com,
davem@davemloft.net
Cc: linux-kernel@vger.kernel.org, ctalbott@google.com,
rni@google.com, Tejun Heo <tj@kernel.org>
Subject: [PATCH 4/6] block: add blk_queue_dead()
Date: Thu, 20 Oct 2011 20:56:38 -0700 [thread overview]
Message-ID: <1319169400-15706-5-git-send-email-tj@kernel.org> (raw)
In-Reply-To: <1319169400-15706-1-git-send-email-tj@kernel.org>
There are a number of QUEUE_FLAG_DEAD tests. Add blk_queue_dead()
macro and use it.
This patch doesn't introduce any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
---
block/blk-core.c | 6 +++---
block/blk-exec.c | 2 +-
block/blk-sysfs.c | 4 ++--
block/blk-throttle.c | 4 ++--
block/blk.h | 2 +-
include/linux/blkdev.h | 1 +
6 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 024cf4a..abf751c 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -603,7 +603,7 @@ EXPORT_SYMBOL(blk_init_allocated_queue_node);
int blk_get_queue(struct request_queue *q)
{
- if (likely(!test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+ if (likely(!blk_queue_dead(q))) {
kobject_get(&q->kobj);
return 0;
}
@@ -750,7 +750,7 @@ static struct request *get_request(struct request_queue *q, int rw_flags,
const bool is_sync = rw_is_sync(rw_flags) != 0;
int may_queue;
- if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+ if (unlikely(blk_queue_dead(q)))
return NULL;
may_queue = elv_may_queue(q, rw_flags);
@@ -870,7 +870,7 @@ static struct request *get_request_wait(struct request_queue *q, int rw_flags,
struct io_context *ioc;
struct request_list *rl = &q->rq;
- if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+ if (unlikely(blk_queue_dead(q)))
return NULL;
prepare_to_wait_exclusive(&rl->wait[is_sync], &wait,
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 5324501..d11c0b8 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -51,7 +51,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
unsigned long flags;
- if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+ if (unlikely(blk_queue_dead(q))) {
rq->errors = -ENXIO;
if (rq->end_io)
rq->end_io(rq, rq->errors);
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index e7f9f65..f0b2ca8 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -425,7 +425,7 @@ queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
if (!entry->show)
return -EIO;
mutex_lock(&q->sysfs_lock);
- if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)) {
+ if (blk_queue_dead(q)) {
mutex_unlock(&q->sysfs_lock);
return -ENOENT;
}
@@ -447,7 +447,7 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr,
q = container_of(kobj, struct request_queue, kobj);
mutex_lock(&q->sysfs_lock);
- if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)) {
+ if (blk_queue_dead(q)) {
mutex_unlock(&q->sysfs_lock);
return -ENOENT;
}
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 8edb949..f799fa2 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -310,7 +310,7 @@ static struct throtl_grp * throtl_get_tg(struct throtl_data *td)
struct request_queue *q = td->queue;
/* no throttling for dead queue */
- if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+ if (unlikely(blk_queue_dead(q)))
return NULL;
rcu_read_lock();
@@ -335,7 +335,7 @@ static struct throtl_grp * throtl_get_tg(struct throtl_data *td)
spin_lock_irq(q->queue_lock);
/* Make sure @q is still alive */
- if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+ if (unlikely(blk_queue_dead(q))) {
kfree(tg);
return NULL;
}
diff --git a/block/blk.h b/block/blk.h
index 77ad885..f8c797c 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -86,7 +86,7 @@ static inline struct request *__elv_next_request(struct request_queue *q)
q->flush_queue_delayed = 1;
return NULL;
}
- if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags) ||
+ if (unlikely(blk_queue_dead(q)) ||
!q->elevator->ops->elevator_dispatch_fn(q, 0))
return NULL;
}
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 45563b0..6a4ab84 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -481,6 +481,7 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
#define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags)
#define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
+#define blk_queue_dead(q) test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags)
#define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
#define blk_queue_noxmerges(q) \
test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)
--
1.7.3.1
next prev parent reply other threads:[~2011-10-21 3:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 3:56 [PATCHSET block:for-3.2/core] further updates to blk_cleanup_queue() Tejun Heo
2011-10-21 3:56 ` [PATCH 1/6] block, sx8: kill blk_insert_request() Tejun Heo
2011-10-21 4:03 ` Jeff Garzik
2011-10-21 3:56 ` [PATCH 2/6] block: allow blk_execute_rq_nowait() to be called form IRQ context Tejun Heo
2011-10-21 9:20 ` Christoph Hellwig
2011-10-21 18:13 ` Tejun Heo
2011-10-21 3:56 ` [PATCH 3/6] block, ide: unexport elv_add_request() Tejun Heo
2011-10-21 3:56 ` Tejun Heo [this message]
2011-10-21 3:56 ` [PATCH 5/6] block: fix drain_all condition in blk_drain_queue() Tejun Heo
2011-10-21 3:56 ` [PATCH 6/6] block: add missing blk_queue_dead() checks Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2011-10-26 1:02 [PATCHSET block:for-3.2/core] further updates to blk_cleanup_queue(), take#2 Tejun Heo
2011-10-26 1:02 ` [PATCH 4/6] block: add blk_queue_dead() Tejun Heo
2011-10-26 8:18 ` Jens Axboe
2011-10-26 17:20 ` Vivek Goyal
2011-10-26 19:25 ` Tejun Heo
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