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io_uring: disable polling pollfree files
Older kernels lack io_uring POLLFREE handling. As only affected files are signalfd and android binder the safest option would be to disable polling those files via io_uring and hope there are no users. Fixes: 221c5eb ("io_uring: add support for IORING_OP_POLL") Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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