io_uring: disable polling pollfree files

stable inclusion
from stable-v5.10.141
commit 28d8d2737e82fc29ff9e788597661abecc7f7994
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I685FC
CEV: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.162&id=28d8d2737e82fc29ff9e788597661abecc7f7994



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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: 221c5eb2 ("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>

conflicts:
  include/linux/fs.h

Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>