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authorJens Axboe <axboe@kernel.dk>2017-06-27 18:22:02 +0300
committerJens Axboe <axboe@kernel.dk>2017-06-27 21:05:27 +0300
commitcb6934f8ea1a595902ca37e250e0917d4dd7b2a7 (patch)
tree4280f328f9b632f6940a613e852f264918619e55 /block/blk-core.c
parentc75b1d9421f80f4143e389d2d50ddfc8a28c8c35 (diff)
downloadlinux-cb6934f8ea1a595902ca37e250e0917d4dd7b2a7.tar.xz
block: add support for write hints in a bio
No functional changes in this patch, we just use up some holes in the bio and request structures to define a write hint that we psas down the stack. Ensure that we don't merge requests that have different life time hints assigned to them, and that we inherit the write hint when cloning a bio. Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 3c18ea60cb1c..af393d5a9680 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1765,6 +1765,7 @@ void blk_init_request_from_bio(struct request *req, struct bio *bio)
req->ioprio = ioc->ioprio;
else
req->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0);
+ req->write_hint = bio->bi_write_hint;
blk_rq_bio_prep(req->q, req, bio);
}
EXPORT_SYMBOL_GPL(blk_init_request_from_bio);