perf_trace_buf_alloc
void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp);
entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx); \
EXPORT_SYMBOL_GPL(perf_trace_buf_alloc);
NOKPROBE_SYMBOL(perf_trace_buf_alloc);
entry = perf_trace_buf_alloc(ENTRY_SIZE, NULL, &rctx);
perf_entry = perf_trace_buf_alloc(ALIGN(size, 8),
entry = perf_trace_buf_alloc(size, ®s, &rctx);
entry = perf_trace_buf_alloc(size, ®s, &rctx);
entry = perf_trace_buf_alloc(size, NULL, &rctx);
entry = perf_trace_buf_alloc(size, NULL, &rctx);
rec = perf_trace_buf_alloc(size, &fake_regs, &rctx);
rec = perf_trace_buf_alloc(size, &fake_regs, &rctx);
entry = perf_trace_buf_alloc(size, NULL, &rctx);