void local_flush_tlb_range()

in mm/tlb.c [88:124]

• 32 lines of code
• 6 McCabe index (conditional complexity)

void local_flush_tlb_range(struct vm_area_struct *vma,
		unsigned long start, unsigned long end)
{
	int cpu = smp_processor_id();
	struct mm_struct *mm = vma->vm_mm;
	unsigned long flags;

	if (mm->context.asid[cpu] == NO_CONTEXT)
		return;

	pr_debug("[tlbrange<%02lx,%08lx,%08lx>]\n",
		 (unsigned long)mm->context.asid[cpu], start, end);
	local_irq_save(flags);

	if (end-start + (PAGE_SIZE-1) <= _TLB_ENTRIES << PAGE_SHIFT) {
		int oldpid = get_rasid_register();

		set_rasid_register(ASID_INSERT(mm->context.asid[cpu]));
		start &= PAGE_MASK;
		if (vma->vm_flags & VM_EXEC)
			while(start < end) {
				invalidate_itlb_mapping(start);
				invalidate_dtlb_mapping(start);
				start += PAGE_SIZE;
			}
		else
			while(start < end) {
				invalidate_dtlb_mapping(start);
				start += PAGE_SIZE;
			}

		set_rasid_register(oldpid);
	} else {
		local_flush_tlb_mm(mm);
	}
	local_irq_restore(flags);
}