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-rw-r--r--mm/slab.c26
1 files changed, 7 insertions, 19 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 7451bdacaf1..bac0f4fcc21 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -935,7 +935,6 @@ static int transfer_objects(struct array_cache *to,
from->avail -= nr;
to->avail += nr;
- to->touched = 1;
return nr;
}
@@ -983,13 +982,11 @@ static struct array_cache **alloc_alien_cache(int node, int limit, gfp_t gfp)
if (limit > 1)
limit = 12;
- ac_ptr = kmalloc_node(memsize, gfp, node);
+ ac_ptr = kzalloc_node(memsize, gfp, node);
if (ac_ptr) {
for_each_node(i) {
- if (i == node || !node_online(i)) {
- ac_ptr[i] = NULL;
+ if (i == node || !node_online(i))
continue;
- }
ac_ptr[i] = alloc_arraycache(node, limit, 0xbaadf00d, gfp);
if (!ac_ptr[i]) {
for (i--; i >= 0; i--)
@@ -2963,8 +2960,10 @@ retry:
spin_lock(&l3->list_lock);
/* See if we can refill from the shared array */
- if (l3->shared && transfer_objects(ac, l3->shared, batchcount))
+ if (l3->shared && transfer_objects(ac, l3->shared, batchcount)) {
+ l3->shared->touched = 1;
goto alloc_done;
+ }
while (batchcount > 0) {
struct list_head *entry;
@@ -3101,7 +3100,7 @@ static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
if (cachep == &cache_cache)
return false;
- return should_failslab(obj_size(cachep), flags);
+ return should_failslab(obj_size(cachep), flags, cachep->flags);
}
static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
@@ -3603,21 +3602,10 @@ EXPORT_SYMBOL(kmem_cache_alloc_notrace);
*/
int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr)
{
- unsigned long addr = (unsigned long)ptr;
- unsigned long min_addr = PAGE_OFFSET;
- unsigned long align_mask = BYTES_PER_WORD - 1;
unsigned long size = cachep->buffer_size;
struct page *page;
- if (unlikely(addr < min_addr))
- goto out;
- if (unlikely(addr > (unsigned long)high_memory - size))
- goto out;
- if (unlikely(addr & align_mask))
- goto out;
- if (unlikely(!kern_addr_valid(addr)))
- goto out;
- if (unlikely(!kern_addr_valid(addr + size - 1)))
+ if (unlikely(!kern_ptr_validate(ptr, size)))
goto out;
page = virt_to_page(ptr);
if (unlikely(!PageSlab(page)))