72 static inline ssize_t vringh_iov_xfer(struct vringh_kiov *iov,  in vringh_iov_xfer()  argument
79 	while (len && iov->i < iov->used) {  in vringh_iov_xfer()
82 		partlen = min(iov->iov[iov->i].iov_len, len);  in vringh_iov_xfer()
83 		err = xfer(iov->iov[iov->i].iov_base, ptr, partlen);  in vringh_iov_xfer()
89 		iov->consumed += partlen;  in vringh_iov_xfer()
90 		iov->iov[iov->i].iov_len -= partlen;  in vringh_iov_xfer()
91 		iov->iov[iov->i].iov_base += partlen;  in vringh_iov_xfer()
93 		if (!iov->iov[iov->i].iov_len) {  in vringh_iov_xfer()
95 			iov->iov[iov->i].iov_len = iov->consumed;  in vringh_iov_xfer()
96 			iov->iov[iov->i].iov_base -= iov->consumed;  in vringh_iov_xfer()
98 			iov->consumed = 0;  in vringh_iov_xfer()
99 			iov->i++;  in vringh_iov_xfer()
181 static int resize_iovec(struct vringh_kiov *iov, gfp_t gfp)  in resize_iovec()  argument
184 	unsigned int flag, new_num = (iov->max_num & ~VRINGH_IOV_ALLOCATED) * 2;  in resize_iovec()
189 	flag = (iov->max_num & VRINGH_IOV_ALLOCATED);  in resize_iovec()
191 		new = krealloc(iov->iov, new_num * sizeof(struct iovec), gfp);  in resize_iovec()
195 			memcpy(new, iov->iov,  in resize_iovec()
196 			       iov->max_num * sizeof(struct iovec));  in resize_iovec()
202 	iov->iov = new;  in resize_iovec()
203 	iov->max_num = (new_num | flag);  in resize_iovec()
285 		struct vringh_kiov *iov;  in __vringh_iov()  local
328 			iov = wiov;  in __vringh_iov()
330 			iov = riov;  in __vringh_iov()
339 		if (!iov) {  in __vringh_iov()
357 		if (unlikely(iov->used == (iov->max_num & ~VRINGH_IOV_ALLOCATED))) {  in __vringh_iov()
358 			err = resize_iovec(iov, gfp);  in __vringh_iov()
363 		iov->iov[iov->used].iov_base = addr;  in __vringh_iov()
364 		iov->iov[iov->used].iov_len = len;  in __vringh_iov()
365 		iov->used++;  in __vringh_iov()
668 	BUILD_BUG_ON(offsetof(struct vringh_kiov, iov) !=  in vringh_getdesc_user()
669 		     offsetof(struct vringh_iov, iov));  in vringh_getdesc_user()