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| author |   Dave Hansen <dave.hansen@linux.intel.com> | 2014-04-08 13:44:27 -0700 |
|---|---|---|
| committer |   Pekka Enberg <penberg@kernel.org> | 2014-04-11 10:06:06 +0300 |
| commit | 34bf6ef94a835a8f1d8abd3e7d38c6c08d205867 (patch) | |
| tree | a5e285e441036ed1d78033192b7eaf74300f4984 /include/linux/mm_types.h | |
| parent | mm/slab.c: cleanup outdated comments and unify variables naming (diff) | |
| download | wireguard-linux-34bf6ef94a835a8f1d8abd3e7d38c6c08d205867.tar.xz wireguard-linux-34bf6ef94a835a8f1d8abd3e7d38c6c08d205867.zip | |
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/linux/mm_types.h')
| -rw-r--r-- | include/linux/mm_types.h | 3 |
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 |