void update_mmu_cache()

in mm/cacheflush.c [201:232]

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

void update_mmu_cache(struct vm_area_struct *vma,
		      unsigned long address, pte_t *ptep)
{
	pte_t pte = *ptep;
	unsigned long pfn = pte_pfn(pte);
	struct page *page;
	struct address_space *mapping;

	reload_tlb_page(vma, address, pte);

	if (!pfn_valid(pfn))
		return;

	/*
	* The zero page is never written to, so never has any dirty
	* cache lines, and therefore never needs to be flushed.
	*/
	page = pfn_to_page(pfn);
	if (page == ZERO_PAGE(0))
		return;

	mapping = page_mapping_file(page);
	if (!test_and_set_bit(PG_dcache_clean, &page->flags))
		__flush_dcache_page(mapping, page);

	if(mapping)
	{
		flush_aliases(mapping, page);
		if (vma->vm_flags & VM_EXEC)
			flush_icache_page(vma, page);
	}
}