diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-11-06 16:29:47 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-09-25 21:02:09 +0200 |
| commit | 441d7a512c7d8c8e2edd199faa11fd6961c36bb5 (patch) | |
| tree | 2a275e283048e26dc44b9f0d17c7de79c80c5ee0 | |
| parent | a856ce82662a138f03c4c6d0f888f2d42141f67a (diff) | |
zsmalloc: use page->private instead of page->first_page
We are going to rework how compound_head() work. It will not use
page->first_page as we have it now.
The only other user of page->first_page beyond compound pages is
zsmalloc.
Let's use page->private instead of page->first_page here. It occupies
the same storage space.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/zsmalloc.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 8bf0c7685..29091f9d1 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -16,7 +16,7 @@ * struct page(s) to form a zspage. * * Usage of struct page fields: - * page->first_page: points to the first component (0-order) page + * page->private: points to the first component (0-order) page * page->index (union with page->freelist): offset of the first object * starting in this page. For the first page, this is * always 0, so we use this field (aka freelist) to point @@ -26,8 +26,7 @@ * * For _first_ page only: * - * page->private (union with page->first_page): refers to the - * component page after the first page + * page->private: refers to the component page after the first page * If the page is first_page for huge object, it stores handle. * Look at size_class->huge. * page->freelist: points to the first free object in zspage. @@ -764,7 +763,7 @@ static struct page *get_first_page(struct page *page) if (is_first_page(page)) return page; else - return page->first_page; + return (struct page *)page_private(page); } static struct page *get_next_page(struct page *page) @@ -949,7 +948,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) * Allocate individual pages and link them together as: * 1. first page->private = first sub-page * 2. all sub-pages are linked together using page->lru - * 3. each sub-page is linked to the first page using page->first_page + * 3. each sub-page is linked to the first page using page->private * * For each size class, First/Head pages are linked together using * page->lru. Also, we set PG_private to identify the first page @@ -974,7 +973,7 @@ static struct page *alloc_zspage(struct size_class *class, gfp_t flags) if (i == 1) set_page_private(first_page, (unsigned long)page); if (i >= 1) - page->first_page = first_page; + set_page_private(page, (unsigned long)first_page); if (i >= 2) list_add(&page->lru, &prev_page->lru); if (i == class->pages_per_zspage - 1) /* last page */ |