ftrace_orig_code 22 arch/ia64/kernel/ftrace.c ftrace_orig_code[MCOUNT_INSN_SIZE] = { ftrace_orig_code 149 arch/ia64/kernel/ftrace.c call_insn = (void *)ftrace_orig_code; ftrace_orig_code 153 arch/ia64/kernel/ftrace.c if (memcmp(replaced, ftrace_orig_code, MCOUNT_INSN_SIZE) != 0)