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authorJens Axboe <axboe@kernel.dk>2018-11-13 21:16:54 -0700
committerJens Axboe <axboe@kernel.dk>2018-11-16 08:34:30 -0700
commit0619317ff8baa2da9238191ad5167ed3618c16d9 (patch)
treebabd22e62aad323bd61539be388620b48a0d1f7c /mm
parente504545446e4be916b170f159b6495c352a2b5a5 (diff)
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 'mm')
-rw-r--r--mm/page_io.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index d4d1c89bcddd..57572ff46016 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -140,7 +140,7 @@ out:
unlock_page(page);
WRITE_ONCE(bio->bi_private, NULL);
bio_put(bio);
- wake_up_process(waiter);
+ blk_wake_io_task(waiter);
put_task_struct(waiter);
}