TIF_RISCV_V_DEFER_RESTORE
clear_thread_flag(TIF_RISCV_V_DEFER_RESTORE);
#define _TIF_RISCV_V_DEFER_RESTORE BIT(TIF_RISCV_V_DEFER_RESTORE)
set_tsk_thread_flag(task, TIF_RISCV_V_DEFER_RESTORE);
clear_tsk_thread_flag(current, TIF_RISCV_V_DEFER_RESTORE);
clear_tsk_thread_flag(dst, TIF_RISCV_V_DEFER_RESTORE);