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authorPekka Enberg <penberg@kernel.org>2011-03-11 18:10:45 +0200
committerPekka Enberg <penberg@kernel.org>2011-03-11 18:10:45 +0200
commitc9149556756d56c68451a4a8735c37e7062fd3d7 (patch)
treea2dae56b22adaa9a23c8f92f30c3b3ad3b610850 /mm/slab.c
parentd71f606f687ef9d0cdddfd3619ca7cb9a0b3fb63 (diff)
parent5bfe53a77e8a3ffce4a10003c75f464a138e272d (diff)
downloadlinux-rt-c9149556756d56c68451a4a8735c37e7062fd3d7.tar.gz
Merge branch 'slab/rcu' into slab/next
Conflicts: mm/slub.c
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c39
1 files changed, 21 insertions, 18 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 4bab2d1a8291..7d92f08b88d7 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -191,22 +191,6 @@ typedef unsigned int kmem_bufctl_t;
#define SLAB_LIMIT (((kmem_bufctl_t)(~0U))-3)
/*
- * struct slab
- *
- * Manages the objs in a slab. Placed either at the beginning of mem allocated
- * for a slab, or allocated from an general cache.
- * Slabs are chained into three list: fully used, partial, fully free slabs.
- */
-struct slab {
- struct list_head list;
- unsigned long colouroff;
- void *s_mem; /* including colour offset */
- unsigned int inuse; /* num of objs active in slab */
- kmem_bufctl_t free;
- unsigned short nodeid;
-};
-
-/*
* struct slab_rcu
*
* slab_destroy on a SLAB_DESTROY_BY_RCU cache uses this structure to
@@ -219,8 +203,6 @@ struct slab {
*
* rcu_read_lock before reading the address, then rcu_read_unlock after
* taking the spinlock within the structure expected at that address.
- *
- * We assume struct slab_rcu can overlay struct slab when destroying.
*/
struct slab_rcu {
struct rcu_head head;
@@ -229,6 +211,27 @@ struct slab_rcu {
};
/*
+ * struct slab
+ *
+ * Manages the objs in a slab. Placed either at the beginning of mem allocated
+ * for a slab, or allocated from an general cache.
+ * Slabs are chained into three list: fully used, partial, fully free slabs.
+ */
+struct slab {
+ union {
+ struct {
+ struct list_head list;
+ unsigned long colouroff;
+ void *s_mem; /* including colour offset */
+ unsigned int inuse; /* num of objs active in slab */
+ kmem_bufctl_t free;
+ unsigned short nodeid;
+ };
+ struct slab_rcu __slab_cover_slab_rcu;
+ };
+};
+
+/*
* struct array_cache
*
* Purpose: