diff options
| -rw-r--r-- | include/linux/mm_types.h | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6dc6413f5deb..3d76a433d52f 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -49,27 +49,32 @@ struct page { * see PAGE_MAPPING_ANON below. */ /* Second double word */ - struct { - union { + union { + struct { pgoff_t index; /* Our offset within mapping. */ - void *freelist; /* slub first free object */ - }; - - union { atomic_t _mapcount; /* Count of ptes mapped in mms, * to show when page is mapped * & limit reverse map searches. */ + atomic_t _count; /* Usage count, see below. */ + }; - /* Used for cmpxchg_double in slub */ - unsigned long counters; - struct { + struct { /* SLUB cmpxchg_double area */ + void *freelist; + union { + unsigned long counters; + struct { unsigned inuse:16; unsigned objects:15; unsigned frozen:1; + /* + * Kernel may make use of this field even when slub + * uses the rest of the double word! + */ + atomic_t _count; + }; }; }; - atomic_t _count; /* Usage count, see below. */ }; /* Third double word block */ |