cmsis_armcc.h中下面代码被注释掉了，不能用__disable_irq();关中断么？
Can only be executed in Privileged modes. 特权模式是什么模式呢？哪位大神指导一下？

[mw_shl_code=c,true]/**
  rief   Enable IRQ Interrupts
  details Enables IRQ interrupts by clearing the I-bit in the CPSR.
           Can only be executed in Privileged modes.
*/
/* intrinsic void __enable_irq();     */


/**
  rief   Disable IRQ Interrupts
  details Disables IRQ interrupts by setting the I-bit in the CPSR.
           Can only be executed in Privileged modes.
*/
/* intrinsic void __disable_irq();    */[/mw_shl_code]