- nip = instruction_pointer(regs);
-
- /*
- * Only measure the CPUs specified by /proc/irq/prof_cpu_mask.
- * (default is all CPUs.)
- */
- if (!((1<<smp_processor_id()) & prof_cpu_mask))
- return;
-
- nip -= (unsigned long) &_stext;
- nip >>= prof_shift;
- /*
- * Don't ignore out-of-bounds EIP values silently,
- * put them into the last histogram slot, so if
- * present, they will show up as a sharp peak.
- */
- if (nip > prof_len-1)
- nip = prof_len-1;
- atomic_inc((atomic_t *)&prof_buffer[nip]);