KMAP
if (cache->vaddr & KMAP)
if (cache->vaddr & KMAP) {
if (cache->vaddr & KMAP) {
BUILD_BUG_ON(KMAP & CLFLUSH_FLAGS);
BUILD_BUG_ON((KMAP | CLFLUSH_FLAGS) & LINUX_PAGE_MASK);
cache->vaddr = flushes | KMAP;
if ((cache->vaddr & KMAP) == 0)