diff options
| -rw-r--r-- | mm/slab_common.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 40b582a014b8..dea2b05c0e3f 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -88,6 +88,19 @@ unsigned int kmem_cache_size(struct kmem_cache *s) EXPORT_SYMBOL(kmem_cache_size); #ifdef CONFIG_DEBUG_VM + +static bool kmem_cache_is_duplicate_name(const char *name) +{ + struct kmem_cache *s; + + list_for_each_entry(s, &slab_caches, list) { + if (!strcmp(s->name, name)) + return true; + } + + return false; +} + static int kmem_cache_sanity_check(const char *name, unsigned int size) { if (!name || in_interrupt() || size > KMALLOC_MAX_SIZE) { @@ -95,6 +108,10 @@ static int kmem_cache_sanity_check(const char *name, unsigned int size) return -EINVAL; } + /* Duplicate names will confuse slabtop, et al */ + WARN(kmem_cache_is_duplicate_name(name), + "kmem_cache of name '%s' already exists\n", name); + WARN_ON(strchr(name, ' ')); /* It confuses parsers */ return 0; } |