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| author | Jens Axboe <axboe@kernel.dk> | 2018-11-13 21:16:54 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-16 08:34:30 -0700 |
| commit | 0619317ff8baa2da9238191ad5167ed3618c16d9 (patch) | |
| tree | babd22e62aad323bd61539be388620b48a0d1f7c /fs/iomap.c | |
| parent | e504545446e4be916b170f159b6495c352a2b5a5 (diff) | |
| download | linux-0619317ff8baa2da9238191ad5167ed3618c16d9.tar.gz linux-0619317ff8baa2da9238191ad5167ed3618c16d9.tar.bz2 linux-0619317ff8baa2da9238191ad5167ed3618c16d9.zip | |
block: add polled wakeup task helper
If we're polling for IO on a device that doesn't use interrupts, then
IO completion loop (and wake of task) is done by submitting task itself.
If that is the case, then we don't need to enter the wake_up_process()
function, we can simply mark ourselves as TASK_RUNNING.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/iomap.c')
| -rw-r--r-- | fs/iomap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/iomap.c b/fs/iomap.c index f61d13dfdf09..b0462b363bad 100644 --- a/fs/iomap.c +++ b/fs/iomap.c @@ -1525,7 +1525,7 @@ static void iomap_dio_bio_end_io(struct bio *bio) if (dio->wait_for_completion) { struct task_struct *waiter = dio->submit.waiter; WRITE_ONCE(dio->submit.waiter, NULL); - wake_up_process(waiter); + blk_wake_io_task(waiter); } else if (dio->flags & IOMAP_DIO_WRITE) { struct inode *inode = file_inode(dio->iocb->ki_filp); |