void update_mmu_cache()

in mm/cacheflush.c [48:76]

• 26 lines of code
• 5 McCabe index (conditional complexity)

void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
		      pte_t * pte)
{
	struct page *page;
	unsigned long pfn = pte_pfn(*pte);
	unsigned long flags;

	if (!pfn_valid(pfn))
		return;

	if (vma->vm_mm == current->active_mm) {
		local_irq_save(flags);
		__nds32__mtsr_dsb(addr, NDS32_SR_TLB_VPN);
		__nds32__tlbop_rwr(*pte);
		__nds32__isb();
		local_irq_restore(flags);
	}
	page = pfn_to_page(pfn);

	if ((test_and_clear_bit(PG_dcache_dirty, &page->flags)) ||
	    (vma->vm_flags & VM_EXEC)) {
		unsigned long kaddr;
		local_irq_save(flags);
		kaddr = (unsigned long)kmap_atomic(page);
		cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC);
		kunmap_atomic((void *)kaddr);
		local_irq_restore(flags);
	}
}