diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index a50ad73..79472b2 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -85,6 +85,11 @@ struct page { /* * Count of ptes mapped in mms, to show when * page is mapped & limit reverse map searches. + * + * Extra information about page type may be + * stored here for pages that are never mapped, + * in which case the value MUST BE <= -2. + * See page-flags.h for more details. */ atomic_t _mapcount; |
