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authorDave Hansen <dave.hansen@linux.intel.com>2014-04-08 13:44:27 -0700
committerPekka Enberg <penberg@kernel.org>2014-04-11 10:06:06 +0300
commit34bf6ef94a835a8f1d8abd3e7d38c6c08d205867 (patch)
treea5e285e441036ed1d78033192b7eaf74300f4984 /include
parent5f0985bb1123b48bbfc632006bdbe76d3dfea76b (diff)
downloadlinux-34bf6ef94a835a8f1d8abd3e7d38c6c08d205867.tar.bz2
mm: slab/slub: use page->list consistently instead of page->lru
'struct page' has two list_head fields: 'lru' and 'list'. Conveniently, they are unioned together. This means that code can use them interchangably, which gets horribly confusing like with this nugget from slab.c: > list_del(&page->lru); > if (page->active == cachep->num) > list_add(&page->list, &n->slabs_full); This patch makes the slab and slub code use page->lru universally instead of mixing ->list and ->lru. So, the new rule is: page->lru is what the you use if you want to keep your page on a list. Don't like the fact that it's not called ->list? Too bad. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Christoph Lameter <cl@linux.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm_types.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 290901a8c1de..84b74080beb7 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -124,6 +124,8 @@ struct page {
union {
struct list_head lru; /* Pageout list, eg. active_list
* protected by zone->lru_lock !
+ * Can be used as a generic list
+ * by the page owner.
*/
struct { /* slub per cpu partial pages */
struct page *next; /* Next partial slab */
@@ -136,7 +138,6 @@ struct page {
#endif
};
- 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