task_work: remove legacy TWA_SIGNAL path
All archs now support TIF_NOTIFY_SIGNAL.
Signed-off-by:
Jens Axboe <axboe@kernel.dk>
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All archs now support TIF_NOTIFY_SIGNAL.
Signed-off-by:
Jens Axboe <axboe@kernel.dk>
mentioned in commit 8c258b46