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authorBart Van Assche <bvanassche@acm.org>2014-12-09 16:59:48 +0100
committerJens Axboe <axboe@fb.com>2014-12-09 09:07:28 -0700
commit52f7eb945f2ba62b324bb9ae16d945326a961dcf (patch)
tree000158231baaf25480bc9adb50ba8dd7e37e646c /block/blk-mq-tag.c
parentc38d185d4af12e8be63ca4b6745d99449c450f12 (diff)
downloadkernel-52f7eb945f2ba62b324bb9ae16d945326a961dcf.tar.gz
blk-mq: Micro-optimize bt_get()
Remove a superfluous finish_wait() call. Convert the two bt_wait_ptr() calls into a single call. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Robert Elliott <elliott@hp.com> Cc: Ming Lei <ming.lei@canonical.com> Cc: Alexander Gordeev <agordeev@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-tag.c')
-rw-r--r--block/blk-mq-tag.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index e47c4c75fd33..1b7229f9354a 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -248,8 +248,8 @@ static int bt_get(struct blk_mq_alloc_data *data,
if (!(data->gfp & __GFP_WAIT))
return -1;
- bs = bt_wait_ptr(bt, hctx);
do {
+ bs = bt_wait_ptr(bt, hctx);
prepare_to_wait(&bs->wait, &wait, TASK_UNINTERRUPTIBLE);
tag = __bt_get(hctx, bt, last_tag);
@@ -285,8 +285,6 @@ static int bt_get(struct blk_mq_alloc_data *data,
hctx = data->hctx;
bt = &hctx->tags->bitmap_tags;
}
- finish_wait(&bs->wait, &wait);
- bs = bt_wait_ptr(bt, hctx);
} while (1);
finish_wait(&bs->wait, &wait);