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commit 6a9ce6b654 upstream.
After sleeping on a wait queue, signal_pending(current) should be
checked (not before sleeping).
Acked-by: Alessandro Rubini <rubini@gnudd.com>
Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>