313 int perf_mmap__push(struct mmap *md, void *to,  in perf_mmap__push()  argument
316 	u64 head = perf_mmap__read_head(&md->core);  in perf_mmap__push()
317 	unsigned char *data = md->core.base + page_size;  in perf_mmap__push()
322 	rc = perf_mmap__read_init(&md->core);  in perf_mmap__push()
326 	size = md->core.end - md->core.start;  in perf_mmap__push()
328 	if ((md->core.start & md->core.mask) + size != (md->core.end & md->core.mask)) {  in perf_mmap__push()
329 		buf = &data[md->core.start & md->core.mask];  in perf_mmap__push()
330 		size = md->core.mask + 1 - (md->core.start & md->core.mask);  in perf_mmap__push()
331 		md->core.start += size;  in perf_mmap__push()
333 		if (push(md, to, buf, size) < 0) {  in perf_mmap__push()
339 	buf = &data[md->core.start & md->core.mask];  in perf_mmap__push()
340 	size = md->core.end - md->core.start;  in perf_mmap__push()
341 	md->core.start += size;  in perf_mmap__push()
343 	if (push(md, to, buf, size) < 0) {  in perf_mmap__push()
348 	md->core.prev = head;  in perf_mmap__push()
349 	perf_mmap__consume(&md->core);  in perf_mmap__push()