Add virt_to_head_page and consolidate code in slab and slub
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/slub.c b/mm/slub.c
index 8fa1c6e..347c11e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1323,9 +1323,7 @@
{
struct page * page;
- page = virt_to_page(x);
-
- page = compound_head(page);
+ page = virt_to_head_page(x);
if (unlikely(PageError(page) && (s->flags & SLAB_STORE_USER)))
set_tracking(s, x, TRACK_FREE);
@@ -1336,7 +1334,7 @@
/* Figure out on which slab object the object resides */
static struct page *get_object_page(const void *x)
{
- struct page *page = compound_head(virt_to_page(x));
+ struct page *page = virt_to_head_page(x);
if (!PageSlab(page))
return NULL;
@@ -2076,7 +2074,7 @@
if (!x)
return;
- page = compound_head(virt_to_page(x));
+ page = virt_to_head_page(x);
s = page->slab;
@@ -2112,7 +2110,7 @@
return NULL;
}
- page = compound_head(virt_to_page(p));
+ page = virt_to_head_page(p);
new_cache = get_slab(new_size, flags);