swap: do not send discards as barriers
The swap code already uses synchronous discards, no need to add I/O barriers. tj: superflous newlines removed. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Hugh Dickins <hughd@google.com> Tested-by: Nigel Cunningham <nigel@tuxonice.net> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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