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authorJens Axboe <jens.axboe@oracle.com>2008-07-03 13:18:54 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-07-03 13:21:15 +0200
commite48ec69005f02b70b7ecfde1bc39a599086d16ef (patch)
tree1868fc162e00af21332a82cdf348229c6b985d2f /block
parente180f5949327e897bc35a816f4f4010186632df9 (diff)
block: extend queue_flag bitops
Add test_and_clear and test_and_set. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index e0fb0bcc0c17..dbc7f42b5d2b 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -205,8 +205,7 @@ void blk_plug_device(struct request_queue *q)
if (blk_queue_stopped(q))
return;
- if (!test_bit(QUEUE_FLAG_PLUGGED, &q->queue_flags)) {
- __set_bit(QUEUE_FLAG_PLUGGED, &q->queue_flags);
+ if (!queue_flag_test_and_set(QUEUE_FLAG_PLUGGED, q)) {
mod_timer(&q->unplug_timer, jiffies + q->unplug_delay);
blk_add_trace_generic(q, NULL, 0, BLK_TA_PLUG);
}
@@ -221,10 +220,9 @@ int blk_remove_plug(struct request_queue *q)
{
WARN_ON(!irqs_disabled());
- if (!test_bit(QUEUE_FLAG_PLUGGED, &q->queue_flags))
+ if (!queue_flag_test_and_clear(QUEUE_FLAG_PLUGGED, q))
return 0;
- queue_flag_clear(QUEUE_FLAG_PLUGGED, q);
del_timer(&q->unplug_timer);
return 1;
}
@@ -328,8 +326,7 @@ void blk_start_queue(struct request_queue *q)
* one level of recursion is ok and is much faster than kicking
* the unplug handling
*/
- if (!test_bit(QUEUE_FLAG_REENTER, &q->queue_flags)) {
- queue_flag_set(QUEUE_FLAG_REENTER, q);
+ if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
q->request_fn(q);
queue_flag_clear(QUEUE_FLAG_REENTER, q);
} else {
@@ -394,8 +391,7 @@ void __blk_run_queue(struct request_queue *q)
* handling reinvoke the handler shortly if we already got there.
*/
if (!elv_queue_empty(q)) {
- if (!test_bit(QUEUE_FLAG_REENTER, &q->queue_flags)) {
- queue_flag_set(QUEUE_FLAG_REENTER, q);
+ if (!queue_flag_test_and_set(QUEUE_FLAG_REENTER, q)) {
q->request_fn(q);
queue_flag_clear(QUEUE_FLAG_REENTER, q);
} else {

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