Messages in this thread Patch in this message | | | From | Knut Omang <> | Subject | [PATCH] mm: provide interface for retrieving kmem_cache name | Date | Thu, 7 Nov 2019 12:54:04 +0100 |
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With the restructuring done in commit 9adeaa226988 ("mm, slab: move memcg_cache_params structure to mm/slab.h")
it is no longer possible for code external to mm to access the name of a kmem_cache as struct kmem_cache has effectively become opaque. Having access to the cache name is helpful to kernel testing infrastructure.
Expose a new function kmem_cache_name to mitigate that.
Signed-off-by: Knut Omang <knut.omang@oracle.com> --- include/linux/slab.h | 1 + mm/slab_common.c | 9 +++++++++ 2 files changed, 10 insertions(+)
diff --git a/include/linux/slab.h b/include/linux/slab.h index 4d2a2fa55ed5..3298c9db6e46 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -702,6 +702,7 @@ static inline void *kzalloc_node(size_t size, gfp_t flags, int node) } unsigned int kmem_cache_size(struct kmem_cache *s); +const char *kmem_cache_name(struct kmem_cache *s); void __init kmem_cache_init_late(void); #if defined(CONFIG_SMP) && defined(CONFIG_SLAB) diff --git a/mm/slab_common.c b/mm/slab_common.c index f9fb27b4c843..269a99dc8214 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -82,6 +82,15 @@ unsigned int kmem_cache_size(struct kmem_cache *s) } EXPORT_SYMBOL(kmem_cache_size); +/* + * Get the name of a slab object + */ +const char *kmem_cache_name(struct kmem_cache *s) +{ + return s->name; +} +EXPORT_SYMBOL(kmem_cache_name); + #ifdef CONFIG_DEBUG_VM static int kmem_cache_sanity_check(const char *name, unsigned int size) { -- 2.20.1
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