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| author |   Mike Christie <mchristi@redhat.com> | 2016-06-05 14:31:45 -0500 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2016-06-07 13:41:38 -0600 |
| commit | a8ebb056a8aeb58aafef0af241a6b3ac34ac86bd (patch) | |
| tree | a656dfc59d3082470756b7828361eedfce5f49a5 /drivers/block/loop.c | |
| parent | fs: have ll_rw_block users pass in op and flags separately (diff) | |
| download | linux-dev-a8ebb056a8aeb58aafef0af241a6b3ac34ac86bd.tar.xz linux-dev-a8ebb056a8aeb58aafef0af241a6b3ac34ac86bd.zip | |
block, drivers, cgroup: use op_is_write helper instead of checking for REQ_WRITE
We currently set REQ_WRITE/WRITE for all non READ IOs
like discard, flush, writesame, etc. In the next patches where we
no longer set up the op as a bitmap, we will not be able to
detect a operation direction like writesame by testing if REQ_WRITE is
set.
This patch converts the drivers and cgroup to use the
op_is_write helper. This should just cover the simple
cases. I did dm, md and bcache in their own patches
because they were more involved.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/loop.c')
| -rw-r--r-- | drivers/block/loop.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 1fa8cc235977..e9f1701af7cb 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -447,7 +447,7 @@ static int lo_req_flush(struct loop_device *lo, struct request *rq) static inline void handle_partial_read(struct loop_cmd *cmd, long bytes) { - if (bytes < 0 || (cmd->rq->cmd_flags & REQ_WRITE)) + if (bytes < 0 || op_is_write(req_op(cmd->rq))) return; if (unlikely(bytes < blk_rq_bytes(cmd->rq))) { @@ -541,7 +541,7 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq) pos = ((loff_t) blk_rq_pos(rq) << 9) + lo->lo_offset; - if (rq->cmd_flags & REQ_WRITE) { + if (op_is_write(req_op(rq))) { if (rq->cmd_flags & REQ_FLUSH) ret = lo_req_flush(lo, rq); else if (rq->cmd_flags & REQ_DISCARD) @@ -1672,7 +1672,7 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx, static void loop_handle_cmd(struct loop_cmd *cmd) { - const bool write = cmd->rq->cmd_flags & REQ_WRITE; + const bool write = op_is_write(req_op(cmd->rq)); struct loop_device *lo = cmd->rq->q->queuedata; int ret = 0; |