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Amit Shah authored
All the backends implement an io watcher tag for callbacks. Move it to CharDriverState from each backend's struct to make accessing the tag from backend-neutral functions easier. This will be used later to cancel a callback on chardev detach from a frontend. CC: <qemu-stable@nongnu.org> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Amit Shah <amit.shah@redhat.com>
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