-static unsigned long check_spinlock_pc(struct pt_regs *regs,
- unsigned long profile_pc)
-{
- unsigned long pc = instruction_pointer(regs);
-
- /*
- * If both the SIAR (sampled instruction) and the perfmon exception
- * occurred in a spinlock region then we account the sample to the
- * calling function. This isnt 100% correct, we really need soft
- * IRQ disable so we always get the perfmon exception at the
- * point at which the SIAR is set.
- */
- if (backtrace_spinlocks && in_lock_functions(pc) &&
- in_lock_functions(profile_pc))
- return regs->link;
- else
- return profile_pc;
-}
-