33 void scatterwalk_start(struct scatter_walk *walk, struct scatterlist *sg)  in scatterwalk_start()  argument
35 	walk->sg = sg;  in scatterwalk_start()
37 	BUG_ON(!sg->length);  in scatterwalk_start()
39 	walk->offset = sg->offset;  in scatterwalk_start()
56 		page = sg_page(walk->sg) + ((walk->offset - 1) >> PAGE_SHIFT);  in scatterwalk_pagedone()
68 		if (walk->offset >= walk->sg->offset + walk->sg->length)  in scatterwalk_pagedone()
69 			scatterwalk_start(walk, sg_next(walk->sg));  in scatterwalk_pagedone()
107 void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,  in scatterwalk_map_and_copy()  argument
116 	sg = scatterwalk_ffwd(tmp, sg, start);  in scatterwalk_map_and_copy()
118 	if (sg_page(sg) == virt_to_page(buf) &&  in scatterwalk_map_and_copy()
119 	    sg->offset == offset_in_page(buf))  in scatterwalk_map_and_copy()
122 	scatterwalk_start(&walk, sg);  in scatterwalk_map_and_copy()
128 int scatterwalk_bytes_sglen(struct scatterlist *sg, int num_bytes)  in scatterwalk_bytes_sglen()  argument
133 	if (num_bytes < sg->length)  in scatterwalk_bytes_sglen()
137 		offset += sg->length;  in scatterwalk_bytes_sglen()
139 		sg = sg_next(sg);  in scatterwalk_bytes_sglen()
142 		if (unlikely(!sg && (num_bytes < offset)))  in scatterwalk_bytes_sglen()
144 	} while (sg && (num_bytes > offset));  in scatterwalk_bytes_sglen()