FTRACE_FL_REGS_EN
bool save_regs = rec->flags & FTRACE_FL_REGS_EN;
!(rec->flags & FTRACE_FL_REGS_EN))
rec->flags |= FTRACE_FL_REGS_EN;
rec->flags &= ~FTRACE_FL_REGS_EN;
FTRACE_FL_REGS_EN | FTRACE_FL_DIRECT_EN |
if (rec->flags & FTRACE_FL_REGS_EN)