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scsi: target: file: Don't zero iter before iov_iter_bvec
iov_iter_bvec() initialises iterators well, no need to pre-zero it beforehand as done in fd_execute_rw_aio(). Compilers can't optimise it out and generate extra code for that (confirmed with assembly). Link: https://lore.kernel.org/r/34cd22d6cec046e3adf402accb1453cc255b9042.1610207523.git.asml.silence@gmail.com Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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@ -266,7 +266,7 @@ fd_execute_rw_aio(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
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struct fd_dev *fd_dev = FD_DEV(dev);
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struct file *file = fd_dev->fd_file;
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struct target_core_file_cmd *aio_cmd;
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struct iov_iter iter = {};
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struct iov_iter iter;
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struct scatterlist *sg;
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struct bio_vec *bvec;
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ssize_t len = 0;
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