On Wed, Oct 10, 2018 at 03:19:17PM +0800, Huang Ying wrote: > +static struct page *mc_handle_swap_pmd(struct vm_area_struct *vma, > + pmd_t pmd, swp_entry_t *entry) > +{ Got /home/dbbench/linux/mm/memcontrol.c:4719:21: warning: ‘mc_handle_swap_pmd’ defined but not used [-Wunused-function] static struct page *mc_handle_swap_pmd(struct vm_area_struct *vma, when # CONFIG_TRANSPARENT_HUGEPAGE is not set