perf_read 184 arch/parisc/kernel/perf.c static ssize_t perf_read(struct file *file, char __user *buf, size_t cnt, loff_t *ppos); perf_read 470 arch/parisc/kernel/perf.c .read = perf_read, perf_read 191 drivers/gpu/drm/msm/msm_perf.c .read = perf_read, perf_read 5940 kernel/events/core.c .read = perf_read,