simd.h
#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();
}