restore_fpregs_from_fpstate
extern void restore_fpregs_from_fpstate(struct fpstate *fpstate, u64 mask);
restore_fpregs_from_fpstate(fpu->fpstate, XFEATURE_MASK_FPSTATE);
restore_fpregs_from_fpstate(&init_fpstate, XFEATURE_MASK_FPSTATE);
restore_fpregs_from_fpstate(cur_fps, XFEATURE_MASK_FPSTATE);