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| H A D | eventfd.c | diff 12aceb89b0bce19eb89735f9de7a9983e4f0adae Fri May 01 14:11:09 CDT 2020 Jens Axboe <axboe@kernel.dk> eventfd: convert to f_op->read_iter()
eventfd is using ->read() as it's file_operations read handler, but
this prevents passing in information about whether a given IO operation
is blocking or not. We can only use the file flags for that. To support
async (-EAGAIN/poll based) retries for io_uring, we need ->read_iter()
support. Convert eventfd to using ->read_iter().
With ->read_iter(), we can support IOCB_NOWAIT. Ensure the fd setup
is done such that we set file->f_mode with FMODE_NOWAIT.
[missing include added]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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