thread_do_softirq in 4.19

[Richard Cochran <richardcochran@xxxxxxxxx>]

Dear list,

The function thread_do_softirq() is never used anywhere in
v4.19.135-rt60.

   git grep thread_do_softirq

   include/linux/interrupt.h:505:static inline void thread_do_softirq(void) { do_softirq(); }
   include/linux/interrupt.h:515:extern void thread_do_softirq(void);
   kernel/softirq.c:674:void thread_do_softirq(void)

Is it supposed to be called from somewhere, or is it simply dead code?

Thanks,
Richard