47 	int nents;  in sg_nents()  local
48 	for (nents = 0; sg; sg = sg_next(sg))  in sg_nents()
49 		nents++;  in sg_nents()
50 	return nents;  in sg_nents()
70 	int nents;  in sg_nents_for_len()  local
76 	for (nents = 0, total = 0; sg; sg = sg_next(sg)) {  in sg_nents_for_len()
77 		nents++;  in sg_nents_for_len()
80 			return nents;  in sg_nents_for_len()
101 struct scatterlist *sg_last(struct scatterlist *sgl, unsigned int nents)  in sg_last()  argument
106 	for_each_sg(sgl, sg, nents, i)  in sg_last()
124 void sg_init_table(struct scatterlist *sgl, unsigned int nents)  in sg_init_table()  argument
126 	memset(sgl, 0, sizeof(*sgl) * nents);  in sg_init_table()
127 	sg_init_marker(sgl, nents);  in sg_init_table()
149 static struct scatterlist *sg_kmalloc(unsigned int nents, gfp_t gfp_mask)  in sg_kmalloc()  argument
151 	if (nents == SG_MAX_SINGLE_ALLOC) {  in sg_kmalloc()
165 		return kmalloc_array(nents, sizeof(struct scatterlist),  in sg_kmalloc()
169 static void sg_kfree(struct scatterlist *sg, unsigned int nents)  in sg_kfree()  argument
171 	if (nents == SG_MAX_SINGLE_ALLOC) {  in sg_kfree()
266 int __sg_alloc_table(struct sg_table *table, unsigned int nents,  in __sg_alloc_table()  argument
278 	if (nents == 0)  in __sg_alloc_table()
281 	if (WARN_ON_ONCE(nents > max_ents))  in __sg_alloc_table()
285 	left = nents;  in __sg_alloc_table()
312 				table->nents = ++table->orig_nents;  in __sg_alloc_table()
318 		table->nents = table->orig_nents += sg_size;  in __sg_alloc_table()
355 int sg_alloc_table(struct sg_table *table, unsigned int nents, gfp_t gfp_mask)  in sg_alloc_table()  argument
359 	ret = __sg_alloc_table(table, nents, SG_MAX_SINGLE_ALLOC,  in sg_alloc_table()
394 		table->nents = 0;  in get_next_sg()
517 	sgt->nents += added_nents;  in __sg_alloc_table_from_pages()
641 void sgl_free_n_order(struct scatterlist *sgl, int nents, int order)  in sgl_free_n_order()  argument
647 	for_each_sg(sgl, sg, nents, i) {  in sgl_free_n_order()
682 			  struct scatterlist *sglist, unsigned int nents,  in __sg_page_iter_start()  argument
686 	piter->__nents = nents;  in __sg_page_iter_start()
756 		    unsigned int nents, unsigned int flags)  in sg_miter_start()  argument
760 	__sg_page_iter_start(&miter->piter, sgl, nents, 0);  in sg_miter_start()
921 size_t sg_copy_buffer(struct scatterlist *sgl, unsigned int nents, void *buf,  in sg_copy_buffer()  argument
933 	sg_miter_start(&miter, sgl, nents, sg_flags);  in sg_copy_buffer()
967 size_t sg_copy_from_buffer(struct scatterlist *sgl, unsigned int nents,  in sg_copy_from_buffer()  argument
970 	return sg_copy_buffer(sgl, nents, (void *)buf, buflen, 0, false);  in sg_copy_from_buffer()
984 size_t sg_copy_to_buffer(struct scatterlist *sgl, unsigned int nents,  in sg_copy_to_buffer()  argument
987 	return sg_copy_buffer(sgl, nents, buf, buflen, 0, true);  in sg_copy_to_buffer()
1002 size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents,  in sg_pcopy_from_buffer()  argument
1005 	return sg_copy_buffer(sgl, nents, (void *)buf, buflen, skip, false);  in sg_pcopy_from_buffer()
1020 size_t sg_pcopy_to_buffer(struct scatterlist *sgl, unsigned int nents,  in sg_pcopy_to_buffer()  argument
1023 	return sg_copy_buffer(sgl, nents, buf, buflen, skip, true);  in sg_pcopy_to_buffer()
1036 size_t sg_zero_buffer(struct scatterlist *sgl, unsigned int nents,  in sg_zero_buffer()  argument
1043 	sg_miter_start(&miter, sgl, nents, sg_flags);  in sg_zero_buffer()