US428_SHAREDMEM_PAGES
us428->us428ctls_sharedmem = alloc_pages_exact(US428_SHAREDMEM_PAGES, GFP_KERNEL);
memset(us428->us428ctls_sharedmem, -1, US428_SHAREDMEM_PAGES);
if (size > US428_SHAREDMEM_PAGES) {
size, (unsigned long)US428_SHAREDMEM_PAGES);
US428_SHAREDMEM_PAGES);