Merge branch 'slab/next' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...

[linux-drm-fsl-dcu.git] / include / linux / mm_types.h

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 011eb85d7b0f75709471990e261396922c156477..bd299418a934e21b99c303af82a7c2f427bbf915 100644 (file)
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -44,18 +44,22 @@ struct page {
        /* First double word block */
        unsigned long flags;            /* Atomic flags, some possibly
                                         * updated asynchronously */
-       struct address_space *mapping;  /* If low bit clear, points to
-                                        * inode address_space, or NULL.
-                                        * If page mapped as anonymous
-                                        * memory, low bit is set, and
-                                        * it points to anon_vma object:
-                                        * see PAGE_MAPPING_ANON below.
-                                        */
+       union {
+               struct address_space *mapping;  /* If low bit clear, points to
+                                                * inode address_space, or NULL.
+                                                * If page mapped as anonymous
+                                                * memory, low bit is set, and
+                                                * it points to anon_vma object:
+                                                * see PAGE_MAPPING_ANON below.
+                                                */
+               void *s_mem;                    /* slab first object */
+       };
+
        /* Second double word */
        struct {
                union {
                        pgoff_t index;          /* Our offset within mapping. */
-                       void *freelist;         /* slub/slob first free object */
+                       void *freelist;         /* sl[aou]b first free object */
                        bool pfmemalloc;        /* If set by the page allocator,
                                                 * ALLOC_NO_WATERMARKS was set
                                                 * and the low watermark was not
@@ -111,6 +115,7 @@ struct page {
                                };
                                atomic_t _count;                /* Usage count, see below. */
                        };
+                       unsigned int active;    /* SLAB */
                };
        };
 
@@ -132,6 +137,9 @@ struct page {
 
                struct list_head list;  /* slobs list of pages */
                struct slab *slab_page; /* slab fields */
+               struct rcu_head rcu_head;       /* Used by SLAB
+                                                * when destroying via RCU
+                                                */
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && USE_SPLIT_PMD_PTLOCKS
                pgtable_t pmd_huge_pte; /* protected by page->ptl */
 #endif