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Merge "mm: slub: reinitialize random sequence cache on slab object update"

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qctecmdr 2020-04-09 04:56:31 -07:00 • committed by Gerrit - the friendly Code Review server
commit 9d71f78e4e
1 changed files with 27 additions and 0 deletions
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27
mm/slub.c
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@ -1541,6 +1541,25 @@ static int init_cache_random_seq(struct kmem_cache *s)
return 0;
}
/* re-initialize the random sequence cache */
static int reinit_cache_random_seq(struct kmem_cache *s)
{
int err;
if (s->random_seq) {
cache_random_seq_destroy(s);
err = init_cache_random_seq(s);
if (err) {
pr_err("SLUB: Unable to re-initialize random sequence cache for %s\n",
s->name);
return err;
}
}
return 0;
}
/* Initialize each random sequence freelist per cache */
static void __init init_freelist_randomization(void)
{
@ -1615,6 +1634,10 @@ static inline int init_cache_random_seq(struct kmem_cache *s)
{
return 0;
}
static inline int reinit_cache_random_seq(struct kmem_cache *s)
{
return 0;
}
static inline void init_freelist_randomization(void) { }
static inline bool shuffle_freelist(struct kmem_cache *s, struct page *page)
{
@ -4968,6 +4991,7 @@ static ssize_t order_store(struct kmem_cache *s,
return -EINVAL;
calculate_sizes(s, order);
reinit_cache_random_seq(s);
return length;
}
@ -5205,6 +5229,7 @@ static ssize_t red_zone_store(struct kmem_cache *s,
s->flags |= SLAB_RED_ZONE;
}
calculate_sizes(s, -1);
reinit_cache_random_seq(s);
return length;
}
SLAB_ATTR(red_zone);
@ -5225,6 +5250,7 @@ static ssize_t poison_store(struct kmem_cache *s,
s->flags |= SLAB_POISON;
}
calculate_sizes(s, -1);
reinit_cache_random_seq(s);
return length;
}
SLAB_ATTR(poison);
@ -5246,6 +5272,7 @@ static ssize_t store_user_store(struct kmem_cache *s,
s->flags |= SLAB_STORE_USER;
}
calculate_sizes(s, -1);
reinit_cache_random_seq(s);
return length;
}
SLAB_ATTR(store_user);