korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-02 08:34:20 +08:00
Code Issues Packages Projects Releases Wiki Activity

slab: Use page struct fields instead of casting

Browse Source 
Add fields to the page struct so that it is properly documented that
slab overlays the lru fields.

This cleans up some casts in slab.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter 2012-06-13 10:24:55 -05:00 committed by Pekka Enberg
parent b5568280c9
commit e571b0ad34
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/mm_types.h
View File

@ -110,6 +110,10 @@ struct page {
};
struct list_head list; /* slobs list of pages */
struct { /* slab fields */
struct kmem_cache *slab_cache;
struct slab *slab_page;
};
};
/* Remainder is not double word aligned */

8
mm/slab.c
View File

@ -496,25 +496,25 @@ static bool slab_max_order_set __initdata;
*/
static inline void page_set_cache(struct page *page, struct kmem_cache *cache)
{
page->lru.next = (struct list_head *)cache;
page->slab_cache = cache;
}
static inline struct kmem_cache *page_get_cache(struct page *page)
{
page = compound_head(page);
BUG_ON(!PageSlab(page));
return (struct kmem_cache *)page->lru.next;
return page->slab_cache;
}
static inline void page_set_slab(struct page *page, struct slab *slab)
{
page->lru.prev = (struct list_head *)slab;
page->slab_page = slab;
}
static inline struct slab *page_get_slab(struct page *page)
{
BUG_ON(!PageSlab(page));
return (struct slab *)page->lru.prev;
return page->slab_page;
}
static inline struct kmem_cache *virt_to_cache(const void *obj)