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由 FUJITA Tomonori 提交于
blk_rq_unmap_user() returns -EFAULT if a program passes an invalid address to kernel. SG_IO path needs to pass the returned value to user space instead of ignoring it. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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