void flush_dcache_page()

in mm/cacheflush.c [237:262]

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

void flush_dcache_page(struct page *page)
{
	struct address_space *mapping;

	mapping = page_mapping_file(page);
	if (mapping && !mapping_mapped(mapping))
		set_bit(PG_dcache_dirty, &page->flags);
	else {
		unsigned long kaddr, flags;

		kaddr = (unsigned long)page_address(page);
		local_irq_save(flags);
		cpu_dcache_wbinval_page(kaddr);
		if (mapping) {
			unsigned long vaddr, kto;

			vaddr = page->index << PAGE_SHIFT;
			if (aliasing(vaddr, kaddr)) {
				kto = kremap0(vaddr, page_to_phys(page));
				cpu_dcache_wbinval_page(kto);
				kunmap01(kto);
			}
		}
		local_irq_restore(flags);
	}
}