_prb_read_valid
static bool _prb_read_valid(struct printk_ringbuffer *rb, u64 *seq,
while (_prb_read_valid(rb, &try_seq, NULL, NULL)) {
return _prb_read_valid(rb, &seq, r, NULL);
return _prb_read_valid(rb, &seq, &r, line_count);
if (!_prb_read_valid(rb, &seq, NULL, NULL))
while (_prb_read_valid(rb, &seq, NULL, NULL))