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| author | Christoph Hellwig <hch@lst.de> | 2018-11-14 17:02:07 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-15 12:13:19 -0700 |
| commit | 57d74df90783f6a6b3e79dfdd2a567ce5db3b790 (patch) | |
| tree | 8ad00d0426916e945f3c7dec608d786972596260 /block/blk-settings.c | |
| parent | 39795d6534c6e698c4f9c065e0a5f4a2e5af7543 (diff) | |
| download | linux-57d74df90783f6a6b3e79dfdd2a567ce5db3b790.tar.gz linux-57d74df90783f6a6b3e79dfdd2a567ce5db3b790.tar.bz2 linux-57d74df90783f6a6b3e79dfdd2a567ce5db3b790.zip | |
block: use atomic bitops for ->queue_flags
->queue_flags is generally not set or cleared in the fast path, and also
generally set or cleared one flag at a time. Make use of the normal
atomic bitops for it so that we don't need to take the queue_lock,
which is otherwise mostly unused in the core block layer now.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index cca83590a1dc..3abe831e92c8 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -834,16 +834,14 @@ EXPORT_SYMBOL(blk_set_queue_depth); */ void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua) { - spin_lock_irq(q->queue_lock); if (wc) - queue_flag_set(QUEUE_FLAG_WC, q); + blk_queue_flag_set(QUEUE_FLAG_WC, q); else - queue_flag_clear(QUEUE_FLAG_WC, q); + blk_queue_flag_clear(QUEUE_FLAG_WC, q); if (fua) - queue_flag_set(QUEUE_FLAG_FUA, q); + blk_queue_flag_set(QUEUE_FLAG_FUA, q); else - queue_flag_clear(QUEUE_FLAG_FUA, q); - spin_unlock_irq(q->queue_lock); + blk_queue_flag_clear(QUEUE_FLAG_FUA, q); wbt_set_write_cache(q, test_bit(QUEUE_FLAG_WC, &q->queue_flags)); } |