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lightnvm: refactor end_io functions for sync

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To implement sync I/O support within the LightNVM core, the end_io
functions are refactored to take an end_io function pointer instead of
testing for initialized media manager, followed by calling its end_io
function.

Sync I/O can then be implemented using a callback that signal I/O
completion. This is similar to the logic found in blk_to_execute_io().
By implementing it this way, the underlying device I/Os submission logic
is abstracted away from core, targets, and media managers.

Signed-off-by: Matias Bjørling <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Matias Bjørling 2016-01-12 07:49:21 +01:00 • committed by Jens Axboe
commit 91276162de
6 changed files with 42 additions and 34 deletions
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3
drivers/block/null_blk.c
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@ -436,9 +436,8 @@ static void null_del_dev(struct nullb *nullb)
static void null_lnvm_end_io(struct request *rq, int error)
{
struct nvm_rq *rqd = rq->end_io_data;
struct nvm_dev *dev = rqd->dev;
dev->mt->end_io(rqd, error);
nvm_end_io(rqd, error);
blk_put_request(rq);
}