summaryrefslogtreecommitdiff
path: root/Documentation/block
diff options
context:
space:
mode:
authorJens Axboe <axboe@fb.com>2016-03-30 19:19:30 +0300
committerJens Axboe <axboe@fb.com>2016-04-13 01:00:39 +0300
commit2245f6de6c68b225986229a2de78c240536f7f38 (patch)
treeb0b8747993fc51d5f16239f002f089c2332ad772 /Documentation/block
parentf935a8ce0a60acf0a7fe4da8d2a1e5a70c598e55 (diff)
downloadlinux-2245f6de6c68b225986229a2de78c240536f7f38.tar.xz
block: kill blk_queue_flush()
We don't have any drivers left using it, so kill it off. Update documentation to use the newer blk_queue_write_cache(). Signed-off-by: Jens Axboe <axboe@fb.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/block')
-rw-r--r--Documentation/block/writeback_cache_control.txt4
1 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/block/writeback_cache_control.txt b/Documentation/block/writeback_cache_control.txt
index 83407d36630a..59e0516cbf6b 100644
--- a/Documentation/block/writeback_cache_control.txt
+++ b/Documentation/block/writeback_cache_control.txt
@@ -71,7 +71,7 @@ requests that have a payload. For devices with volatile write caches the
driver needs to tell the block layer that it supports flushing caches by
doing:
- blk_queue_flush(sdkp->disk->queue, REQ_FLUSH);
+ blk_queue_write_cache(sdkp->disk->queue, true, false);
and handle empty REQ_FLUSH requests in its prep_fn/request_fn. Note that
REQ_FLUSH requests with a payload are automatically turned into a sequence
@@ -79,7 +79,7 @@ of an empty REQ_FLUSH request followed by the actual write by the block
layer. For devices that also support the FUA bit the block layer needs
to be told to pass through the REQ_FUA bit using:
- blk_queue_flush(sdkp->disk->queue, REQ_FLUSH | REQ_FUA);
+ blk_queue_write_cache(sdkp->disk->queue, true, true);
and the driver must handle write requests that have the REQ_FUA bit set
in prep_fn/request_fn. If the FUA bit is not natively supported the block