Sean Christopherson <sean.j.christopherson@xxxxxxxxx> writes: > diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h > index b5e49e6bac63..400ac8da75e8 100644 > --- a/arch/x86/include/asm/pgtable_types.h > +++ b/arch/x86/include/asm/pgtable_types.h > @@ -561,6 +561,10 @@ static inline void update_page_count(int level, unsigned long pages) { } > extern pte_t *lookup_address(unsigned long address, unsigned int *level); > extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address, > unsigned int *level); > + > +struct mm_struct; > +pte_t *lookup_address_in_mm(struct mm_struct *mm, unsigned long address, > + unsigned int *level); Please keep the file consistent and use extern even if not required. Other than that: Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>