diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index eb9da245286d..3a554fdf45c2 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -96,6 +96,14 @@ struct page { }; union { + /* + * If the page is neither PageSlab nor mappable to userspace, + * the value stored here may help determine what this page + * is used for. See page-flags.h for a list of page types + * which are currently stored here. + */ + unsigned int page_type; + _slub_counter_t counters; unsigned int active; /* SLAB */ struct { /* SLUB */ @@ -109,11 +117,6 @@ 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; |