#include <linux/hardirq.h>
  
  /*
   * may_use_simd - whether it is allowable at this time to issue SIMD
   *                instructions or access the SIMD register file
   *
   * As architectures typically don't preserve the SIMD register file when
   * taking an interrupt, !in_interrupt() should be a reasonable default.
   */
  static __must_check inline bool may_use_simd(void)
  {
  	return !in_interrupt();
  }