yangerkun daa5de5415 io_uring: compare cached_cq_tail with cq.head in_io_uring_poll
After 75b28af("io_uring: allocate the two rings together"), we compare
sq.head with cached_cq_tail to determine does there any cq invalid.
Actually, we should use cq.head.

Fixes: 75b28affdd6a ("io_uring: allocate the two rings together")
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-24 07:04:15 -06:00
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