It's the last bio-only REQ_* flag, and we have space for it in the bio
bi_flags field.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-throttle.c | 10 +++++-----
include/linux/blk_types.h | 8 ++------
2 files changed, 7 insertions(+), 11 deletions(-)
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index a3ea826..a6bb4fe 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -818,13 +818,13 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
tg->io_disp[rw]++;
/*
- * REQ_THROTTLED is used to prevent the same bio to be throttled
+ * BIO_THROTTLED is used to prevent the same bio to be throttled
* more than once as a throttled bio will go through blk-throtl the
* second time when it eventually gets issued. Set it when a bio
* is being charged to a tg.
*/
- if (!(bio->bi_opf & REQ_THROTTLED))
- bio->bi_opf |= REQ_THROTTLED;
+ if (!bio_flagged(bio, BIO_THROTTLED))
+ bio_set_flag(bio, BIO_THROTTLED);
}
/**
@@ -1401,7 +1401,7 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
WARN_ON_ONCE(!rcu_read_lock_held());
/* see throtl_charge_bio() */
- if ((bio->bi_opf & REQ_THROTTLED) || !tg->has_rules[rw])
+ if (bio_flagged(bio, BIO_THROTTLED) || !tg->has_rules[rw])
goto out;
spin_lock_irq(q->queue_lock);
@@ -1480,7 +1480,7 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
* being issued.
*/
if (!throttled)
- bio->bi_opf &= ~REQ_THROTTLED;
+ bio_clear_flag(bio, BIO_THROTTLED);
return throttled;
}
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 44f9bca..6df722d 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -119,6 +119,8 @@ struct bio {
#define BIO_QUIET 6 /* Make BIO Quiet */
#define BIO_CHAIN 7 /* chained bio, ->bi_remaining in effect */
#define BIO_REFFED 8 /* bio has elevated ->bi_cnt */
+#define BIO_THROTTLED 9 /* This bio has already been subjected to
+ * throttling rules. Don't do it again. */
/*
* Flags starting here get preserved by bio_reset() - this includes
@@ -165,10 +167,6 @@ enum rq_flag_bits {
__REQ_PREFLUSH, /* request for cache flush */
__REQ_RAHEAD, /* read ahead, can fail anytime */
- /* bio only flags */
- __REQ_THROTTLED, /* This bio has already been subjected to
- * throttling rules. Don't do it again. */
-
/* request only flags */
__REQ_SORTED, /* elevator knows about this request */
__REQ_SOFTBARRIER, /* may not be passed by ioscheduler */
@@ -213,8 +211,6 @@ enum rq_flag_bits {
(REQ_NOMERGE | REQ_STARTED | REQ_SOFTBARRIER | REQ_PREFLUSH | REQ_FUA | REQ_FLUSH_SEQ)
#define REQ_RAHEAD (1ULL << __REQ_RAHEAD)
-#define REQ_THROTTLED (1ULL << __REQ_THROTTLED)
-
#define REQ_SORTED (1ULL << __REQ_SORTED)
#define REQ_SOFTBARRIER (1ULL << __REQ_SOFTBARRIER)
#define REQ_FUA (1ULL << __REQ_FUA)
--
2.1.4
--
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