BUILD_BUG_ON(IS_ENABLED(CONFIG_VMAP_STACK)&&PAGE_SIZE%1024!=0); BUG_ON(vm->nr_pages!=THREAD_SIZE/PAGE_SIZE); for(i=0;i<THREAD_SIZE/PAGE_SIZE;i++) { ret=memcg_kmem_charge_page(vm->pages[i],GFP_KERNEL,0); if(ret) gotoerr; ...