192 static void copy_from_pcpubuf(struct page **out, const char *dst,  in copy_from_pcpubuf()  argument
196 	const char *end = dst + outputsize;  in copy_from_pcpubuf()
198 	const char *cur = dst - pageofs_out;  in copy_from_pcpubuf()
206 			if (cur >= dst) {  in copy_from_pcpubuf()
226 	void *dst;  in z_erofs_decompress_generic()  local
231 		dst = kmap_atomic(*rq->out);  in z_erofs_decompress_generic()
242 		dst = erofs_get_pcpubuf(0);  in z_erofs_decompress_generic()
243 		if (IS_ERR(dst))  in z_erofs_decompress_generic()
244 			return PTR_ERR(dst);  in z_erofs_decompress_generic()
247 		ret = alg->decompress(rq, dst);  in z_erofs_decompress_generic()
249 			copy_from_pcpubuf(rq->out, dst, rq->pageofs_out,  in z_erofs_decompress_generic()
252 		erofs_put_pcpubuf(dst);  in z_erofs_decompress_generic()
260 		dst = page_address(*rq->out);  in z_erofs_decompress_generic()
267 		dst = vm_map_ram(rq->out, nrpages_out, -1, PAGE_KERNEL);  in z_erofs_decompress_generic()
270 		if (dst || ++i >= 3)  in z_erofs_decompress_generic()
275 	if (!dst)  in z_erofs_decompress_generic()
281 	ret = alg->decompress(rq, dst + rq->pageofs_out);  in z_erofs_decompress_generic()
284 		kunmap_atomic(dst);  in z_erofs_decompress_generic()
286 		vm_unmap_ram(dst, nrpages_out);  in z_erofs_decompress_generic()
296 	unsigned char *src, *dst;  in z_erofs_shifted_transform()  local
310 		dst = NULL;  in z_erofs_shifted_transform()
312 		dst = kmap_atomic(rq->out[0]);  in z_erofs_shifted_transform()
313 		memcpy(dst + rq->pageofs_out, src, righthalf);  in z_erofs_shifted_transform()
319 		if (dst)  in z_erofs_shifted_transform()
320 			kunmap_atomic(dst);  in z_erofs_shifted_transform()
322 		dst = kmap_atomic(rq->out[1]);  in z_erofs_shifted_transform()
323 		memcpy(dst, src + righthalf, rq->pageofs_out);  in z_erofs_shifted_transform()
325 	if (dst)  in z_erofs_shifted_transform()
326 		kunmap_atomic(dst);  in z_erofs_shifted_transform()