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| author | Mike Christie <mchristi@redhat.com> | 2016-06-05 14:32:25 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-06-07 13:41:38 -0600 |
| commit | 28a8f0d317bf225ff15008f5dd66ae16242dd843 (patch) | |
| tree | 4ed24aee241907a3612a61f8cc634acd10989c21 /block/blk-flush.c | |
| parent | a418090aa88b9b531ac1f504d6bb8c0e9b04ccb7 (diff) | |
| download | lwn-28a8f0d317bf225ff15008f5dd66ae16242dd843.tar.gz lwn-28a8f0d317bf225ff15008f5dd66ae16242dd843.zip | |
block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH
To avoid confusion between REQ_OP_FLUSH, which is handled by
request_fn drivers, and upper layers requesting the block layer
perform a flush sequence along with possibly a WRITE, this patch
renames REQ_FLUSH to REQ_PREFLUSH.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-flush.c')
| -rw-r--r-- | block/blk-flush.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index 21f0d5b0d2ca..d308def812db 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -10,8 +10,8 @@ * optional steps - PREFLUSH, DATA and POSTFLUSH - according to the request * properties and hardware capability. * - * If a request doesn't have data, only REQ_FLUSH makes sense, which - * indicates a simple flush request. If there is data, REQ_FLUSH indicates + * If a request doesn't have data, only REQ_PREFLUSH makes sense, which + * indicates a simple flush request. If there is data, REQ_PREFLUSH indicates * that the device cache should be flushed before the data is executed, and * REQ_FUA means that the data must be on non-volatile media on request * completion. @@ -20,11 +20,11 @@ * 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_FLUSH is + * If the device has writeback cache and supports FUA, REQ_PREFLUSH is * translated to PREFLUSH but REQ_FUA is passed down directly with DATA. * - * If the device has writeback cache and doesn't support FUA, REQ_FLUSH is - * translated to PREFLUSH and REQ_FUA to POSTFLUSH. + * If the device has writeback cache and doesn't support FUA, REQ_PREFLUSH + * is translated to PREFLUSH and REQ_FUA to POSTFLUSH. * * The actual execution of flush is double buffered. Whenever a request * needs to execute PRE or POSTFLUSH, it queues at @@ -103,7 +103,7 @@ static unsigned int blk_flush_policy(unsigned long fflags, struct request *rq) policy |= REQ_FSEQ_DATA; if (fflags & (1UL << QUEUE_FLAG_WC)) { - if (rq->cmd_flags & REQ_FLUSH) + if (rq->cmd_flags & REQ_PREFLUSH) policy |= REQ_FSEQ_PREFLUSH; if (!(fflags & (1UL << QUEUE_FLAG_FUA)) && (rq->cmd_flags & REQ_FUA)) @@ -391,9 +391,9 @@ void blk_insert_flush(struct request *rq) /* * @policy now records what operations need to be done. Adjust - * REQ_FLUSH and FUA for the driver. + * REQ_PREFLUSH and FUA for the driver. */ - rq->cmd_flags &= ~REQ_FLUSH; + rq->cmd_flags &= ~REQ_PREFLUSH; if (!(fflags & (1UL << QUEUE_FLAG_FUA))) rq->cmd_flags &= ~REQ_FUA; |