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block: kill off q->flush_flags

Browse source 
Now that we converted everything to the newer block write cache
interface, kill off the queue flush_flags and queueable flush
entries.

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jens Axboe 2016-04-13 13:33:19 -06:00
commit c888a8f95a
8 changed files with 32 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

3
block/blk-core.c
View file

@ -1964,7 +1964,8 @@ generic_make_request_checks(struct bio *bio)
* drivers without flush support don't have to worry
* about them.
*/
if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) && !q->flush_flags) {
if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) &&
!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) {
bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
if (!nr_sectors) {
err = 0;

11
block/blk-flush.c
View file

@ -95,17 +95,18 @@ enum {
static bool blk_kick_flush(struct request_queue *q,
struct blk_flush_queue *fq);
static unsigned int blk_flush_policy(unsigned int fflags, struct request *rq)
static unsigned int blk_flush_policy(unsigned long fflags, struct request *rq)
{
unsigned int policy = 0;
if (blk_rq_sectors(rq))
policy |= REQ_FSEQ_DATA;
if (fflags & REQ_FLUSH) {
if (fflags & (1UL << QUEUE_FLAG_WC)) {
if (rq->cmd_flags & REQ_FLUSH)
policy |= REQ_FSEQ_PREFLUSH;
if (!(fflags & REQ_FUA) && (rq->cmd_flags & REQ_FUA))
if (!(fflags & (1UL << QUEUE_FLAG_FUA)) &&
(rq->cmd_flags & REQ_FUA))
policy |= REQ_FSEQ_POSTFLUSH;
}
return policy;
@ -384,7 +385,7 @@ static void mq_flush_data_end_io(struct request *rq, int error)
void blk_insert_flush(struct request *rq)
{
struct request_queue *q = rq->q;
unsigned int fflags = q->flush_flags; /* may change, cache */
unsigned long fflags = q->queue_flags; /* may change, cache */
unsigned int policy = blk_flush_policy(fflags, rq);
struct blk_flush_queue *fq = blk_get_flush_queue(q, rq->mq_ctx);
@ -393,7 +394,7 @@ void blk_insert_flush(struct request *rq)
* REQ_FLUSH and FUA for the driver.
*/
rq->cmd_flags &= ~REQ_FLUSH;
if (!(fflags & REQ_FUA))
if (!(fflags & (1UL << QUEUE_FLAG_FUA)))
rq->cmd_flags &= ~REQ_FUA;
/*

18
block/blk-settings.c
View file

@ -822,7 +822,12 @@ EXPORT_SYMBOL(blk_queue_update_dma_alignment);
void blk_queue_flush_queueable(struct request_queue *q, bool queueable)
{
q->flush_not_queueable = !queueable;
spin_lock_irq(q->queue_lock);
if (queueable)
clear_bit(QUEUE_FLAG_FLUSH_NQ, &q->queue_flags);
else
set_bit(QUEUE_FLAG_FLUSH_NQ, &q->queue_flags);
spin_unlock_irq(q->queue_lock);
}
EXPORT_SYMBOL_GPL(blk_queue_flush_queueable);
@ -837,16 +842,13 @@ EXPORT_SYMBOL_GPL(blk_queue_flush_queueable);
void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
{
spin_lock_irq(q->queue_lock);
if (wc) {
if (wc)
queue_flag_set(QUEUE_FLAG_WC, q);
q->flush_flags = REQ_FLUSH;
} else
else
queue_flag_clear(QUEUE_FLAG_WC, q);
if (fua) {
if (wc)
q->flush_flags |= REQ_FUA;
if (fua)
queue_flag_set(QUEUE_FLAG_FUA, q);
} else
else
queue_flag_clear(QUEUE_FLAG_FUA, q);
spin_unlock_irq(q->queue_lock);
}