Quoting Joerg Roedel (2020-08-21 11:09:02) > @@ -2333,6 +2339,7 @@ static int __apply_to_page_range(struct mm_struct *mm, > unsigned long addr, > pgd_t *pgd; > unsigned long next; > unsigned long end = addr + size; > + pgtbl_mod_mask mask = 0; > int err = 0; > > if (WARN_ON(addr >= end)) > @@ -2343,11 +2350,14 @@ static int __apply_to_page_range(struct mm_struct > *mm, unsigned long addr, > next = pgd_addr_end(addr, end); > if (!create && pgd_none_or_clear_bad(pgd)) > continue; > - err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, > create); > + err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, > create, &mask); > if (err) > break; > } while (pgd++, addr = next, addr != end); > > + if (mask & ARCH_PAGE_TABLE_SYNC_MASK) > + arch_sync_kernel_mappings(addr, addr + size);
We need to store the initial addr, as here addr == end [or earlier on earlier], so range is (start, addr). -Chris
