Hello, On Wed, 18 Dec 2024 14:33:08 +0800 yangge1116@xxxxxxx wrote: [...] > diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h > index ae4fe86..7d36ac8 100644 > --- a/include/linux/hugetlb.h > +++ b/include/linux/hugetlb.h > @@ -681,6 +681,7 @@ struct huge_bootmem_page { > }; > > int isolate_or_dissolve_huge_page(struct page *page, struct list_head *list); > +int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn); > struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma, > unsigned long addr, int avoid_reserve); > struct folio *alloc_hugetlb_folio_nodemask(struct hstate *h, int preferred_nid, > @@ -1059,6 +1060,11 @@ static inline int isolate_or_dissolve_huge_page(struct page *page, > return -ENOMEM; > } > > +int replace_free_hugepage_folios(unsigned long start_pfn, unsigned long end_pfn) > +{ > + return 0; > +} > + I think this should be static inline. Otherwise, build fails when CONFIG_HUGETLB_PAGE is unset. Since this is already merged into mm-unstable and the problem and fix seems straigthforward, I directly sent my fix: https://lore.kernel.org/20241219183753.62922-1-sj@xxxxxxxxxx Thanks, SJ [...]