perf_branch_stack 59 arch/powerpc/perf/core-book3s.c struct perf_branch_stack bhrb_stack; perf_branch_stack 234 arch/x86/events/perf_event.h struct perf_branch_stack lbr_stack; perf_branch_stack 939 include/linux/perf_event.h struct perf_branch_stack *br_stack;