summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--block/blk-flush.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 83b7d5b41c790..4938bec8cfef9 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -1,12 +1,12 @@
/*
- * Functions to sequence FLUSH and FUA writes.
+ * Functions to sequence PREFLUSH and FUA writes.
*
* Copyright (C) 2011 Max Planck Institute for Gravitational Physics
* Copyright (C) 2011 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*
- * REQ_{FLUSH|FUA} requests are decomposed to sequences consisted of three
+ * REQ_{PREFLUSH|FUA} requests are decomposed to sequences consisted of three
* optional steps - PREFLUSH, DATA and POSTFLUSH - according to the request
* properties and hardware capability.
*
@@ -16,9 +16,9 @@
* REQ_FUA means that the data must be on non-volatile media on request
* completion.
*
- * If the device doesn't have writeback cache, FLUSH and FUA don't make any
- * difference. The requests are either completed immediately if there's no
- * data or executed as normal requests otherwise.
+ * If the device doesn't have writeback cache, PREFLUSH and FUA don't make any
+ * difference. The requests are either completed immediately if there's no data
+ * or executed as normal requests otherwise.
*
* If the device has writeback cache and supports FUA, REQ_PREFLUSH is
* translated to PREFLUSH but REQ_FUA is passed down directly with DATA.
@@ -31,7 +31,7 @@
* fq->flush_queue[fq->flush_pending_idx]. Once certain criteria are met, a
* REQ_OP_FLUSH is issued and the pending_idx is toggled. When the flush
* completes, all the requests which were pending are proceeded to the next
- * step. This allows arbitrary merging of different types of FLUSH/FUA
+ * step. This allows arbitrary merging of different types of PREFLUSH/FUA
* requests.
*
* Currently, the following conditions are used to determine when to issue
@@ -47,19 +47,19 @@
* C3. The second condition is ignored if there is a request which has
* waited longer than FLUSH_PENDING_TIMEOUT. This is to avoid
* starvation in the unlikely case where there are continuous stream of
- * FUA (without FLUSH) requests.
+ * FUA (without PREFLUSH) requests.
*
* For devices which support FUA, it isn't clear whether C2 (and thus C3)
* is beneficial.
*
- * Note that a sequenced FLUSH/FUA request with DATA is completed twice.
+ * Note that a sequenced PREFLUSH/FUA request with DATA is completed twice.
* Once while executing DATA and again after the whole sequence is
* complete. The first completion updates the contained bio but doesn't
* finish it so that the bio submitter is notified only after the whole
* sequence is complete. This is implemented by testing RQF_FLUSH_SEQ in
* req_bio_endio().
*
- * The above peculiarity requires that each FLUSH/FUA request has only one
+ * The above peculiarity requires that each PREFLUSH/FUA request has only one
* bio attached to it, which is guaranteed as they aren't allowed to be
* merged in the usual way.
*/
@@ -76,7 +76,7 @@
#include "blk-mq-tag.h"
#include "blk-mq-sched.h"
-/* FLUSH/FUA sequences */
+/* PREFLUSH/FUA sequences */
enum {
REQ_FSEQ_PREFLUSH = (1 << 0), /* pre-flushing in progress */
REQ_FSEQ_DATA = (1 << 1), /* data write in progress */
@@ -148,7 +148,7 @@ static bool blk_flush_queue_rq(struct request *rq, bool add_front)
/**
* blk_flush_complete_seq - complete flush sequence
- * @rq: FLUSH/FUA request being sequenced
+ * @rq: PREFLUSH/FUA request being sequenced
* @fq: flush queue
* @seq: sequences to complete (mask of %REQ_FSEQ_*, can be zero)
* @error: whether an error occurred
@@ -406,7 +406,7 @@ static void mq_flush_data_end_io(struct request *rq, blk_status_t error)
}
/**
- * blk_insert_flush - insert a new FLUSH/FUA request
+ * blk_insert_flush - insert a new PREFLUSH/FUA request
* @rq: request to insert
*
* To be called from __elv_add_request() for %ELEVATOR_INSERT_FLUSH insertions.