181 	struct blkcipher_walk walk;  in encrypt()  local
186 	blkcipher_walk_init(&walk, dst, src, nbytes);  in encrypt()
187 	err = blkcipher_walk_virt_block(desc, &walk, 64);  in encrypt()
189 	salsa20_ivsetup(ctx, walk.iv);  in encrypt()
191 	if (likely(walk.nbytes == nbytes))  in encrypt()
193 		salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,  in encrypt()
194 				      walk.src.virt.addr, nbytes);  in encrypt()
195 		return blkcipher_walk_done(desc, &walk, 0);  in encrypt()
198 	while (walk.nbytes >= 64) {  in encrypt()
199 		salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,  in encrypt()
200 				      walk.src.virt.addr,  in encrypt()
201 				      walk.nbytes - (walk.nbytes % 64));  in encrypt()
202 		err = blkcipher_walk_done(desc, &walk, walk.nbytes % 64);  in encrypt()
205 	if (walk.nbytes) {  in encrypt()
206 		salsa20_encrypt_bytes(ctx, walk.dst.virt.addr,  in encrypt()
207 				      walk.src.virt.addr, walk.nbytes);  in encrypt()
208 		err = blkcipher_walk_done(desc, &walk, 0);  in encrypt()