diff options
Diffstat (limited to 'include/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index c3852fd4a1cc..e30687bad075 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -19,10 +19,16 @@ struct page { unsigned long flags; /* Atomic flags, some possibly * updated asynchronously */ atomic_t _count; /* Usage count, see below. */ - atomic_t _mapcount; /* Count of ptes mapped in mms, + union { + atomic_t _mapcount; /* Count of ptes mapped in mms, * to show when page is mapped * & limit reverse map searches. */ + struct { /* SLUB uses */ + short unsigned int inuse; + short unsigned int offset; + }; + }; union { struct { unsigned long private; /* Mapping-private opaque data: @@ -43,8 +49,15 @@ struct page { #if NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS spinlock_t ptl; #endif + struct { /* SLUB uses */ + struct page *first_page; /* Compound pages */ + struct kmem_cache *slab; /* Pointer to slab */ + }; + }; + union { + pgoff_t index; /* Our offset within mapping. */ + void *freelist; /* SLUB: pointer to free object */ }; - pgoff_t index; /* Our offset within mapping. */ struct list_head lru; /* Pageout list, eg. active_list * protected by zone->lru_lock ! */ |