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slab: factor out initialization of array cache 

Factor out initialization of array cache to use it in following patch.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2014-08-06 16:04:27 -07:00 committed by Linus Torvalds
parent 97654dfa20
commit 1fe00d50a9
1 changed files with 19 additions and 14 deletions
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33
mm/slab.c
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@ -791,13 +791,8 @@ static void start_cpu_timer(int cpu)
}
}
static struct array_cache *alloc_arraycache(int node, int entries,
int batchcount, gfp_t gfp)
static void init_arraycache(struct array_cache *ac, int limit, int batch)
{
int memsize = sizeof(void *) * entries + sizeof(struct array_cache);
struct array_cache *nc = NULL;
nc = kmalloc_node(memsize, gfp, node);
/*
* The array_cache structures contain pointers to free object.
* However, when such objects are allocated or transferred to another
@ -805,15 +800,25 @@ static struct array_cache *alloc_arraycache(int node, int entries,
* valid references during a kmemleak scan. Therefore, kmemleak must
* not scan such objects.
*/
kmemleak_no_scan(nc);
if (nc) {
nc->avail = 0;
nc->limit = entries;
nc->batchcount = batchcount;
nc->touched = 0;
spin_lock_init(&nc->lock);
kmemleak_no_scan(ac);
if (ac) {
ac->avail = 0;
ac->limit = limit;
ac->batchcount = batch;
ac->touched = 0;
spin_lock_init(&ac->lock);
}
return nc;
}
static struct array_cache *alloc_arraycache(int node, int entries,
int batchcount, gfp_t gfp)
{
int memsize = sizeof(void *) * entries + sizeof(struct array_cache);
struct array_cache *ac = NULL;
ac = kmalloc_node(memsize, gfp, node);
init_arraycache(ac, entries, batchcount);
return ac;
}
static inline bool is_slab_pfmemalloc(struct page *page)