From b14051352465a24b3c9ceaccac4e39b3521bb370 Mon Sep 17 00:00:00 2001 From: Hyeonggon Yoo <42.hyeyoo@gmail.com> Date: Wed, 17 Aug 2022 19:18:21 +0900 Subject: mm/sl[au]b: generalize kmalloc subsystem Now everything in kmalloc subsystem can be generalized. Let's do it! Generalize __do_kmalloc_node(), __kmalloc_node_track_caller(), kfree(), __ksize(), __kmalloc(), __kmalloc_node() and move them to slab_common.c. In the meantime, rename kmalloc_large_node_notrace() to __kmalloc_large_node() and make it static as it's now only called in slab_common.c. [ feng.tang@intel.com: adjust kfence skip list to include __kmem_cache_free so that kfence kunit tests do not fail ] Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Reviewed-by: Vlastimil Babka Signed-off-by: Vlastimil Babka --- mm/slab.c | 108 -------------------------------------------------------------- 1 file changed, 108 deletions(-) (limited to 'mm/slab.c') diff --git a/mm/slab.c b/mm/slab.c index aa61851b0a07..5b234e3ab165 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3587,44 +3587,6 @@ void *kmem_cache_alloc_node_trace(struct kmem_cache *cachep, EXPORT_SYMBOL(kmem_cache_alloc_node_trace); #endif -static __always_inline void * -__do_kmalloc_node(size_t size, gfp_t flags, int node, unsigned long caller) -{ - struct kmem_cache *cachep; - void *ret; - - if (unlikely(size > KMALLOC_MAX_CACHE_SIZE)) { - ret = kmalloc_large_node_notrace(size, flags, node); - - trace_kmalloc_node(caller, ret, NULL, size, - PAGE_SIZE << get_order(size), - flags, node); - return ret; - } - - cachep = kmalloc_slab(size, flags); - if (unlikely(ZERO_OR_NULL_PTR(cachep))) - return cachep; - - ret = kmem_cache_alloc_node_trace(cachep, flags, node, size); - ret = kasan_kmalloc(cachep, ret, size, flags); - - return ret; -} - -void *__kmalloc_node(size_t size, gfp_t flags, int node) -{ - return __do_kmalloc_node(size, flags, node, _RET_IP_); -} -EXPORT_SYMBOL(__kmalloc_node); - -void *__kmalloc_node_track_caller(size_t size, gfp_t flags, - int node, unsigned long caller) -{ - return __do_kmalloc_node(size, flags, node, caller); -} -EXPORT_SYMBOL(__kmalloc_node_track_caller); - #ifdef CONFIG_PRINTK void __kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct slab *slab) { @@ -3647,12 +3609,6 @@ void __kmem_obj_info(struct kmem_obj_info *kpp, void *object, struct slab *slab) } #endif -void *__kmalloc(size_t size, gfp_t flags) -{ - return __do_kmalloc_node(size, flags, NUMA_NO_NODE, _RET_IP_); -} -EXPORT_SYMBOL(__kmalloc); - static __always_inline void __do_kmem_cache_free(struct kmem_cache *cachep, void *objp, unsigned long caller) @@ -3730,43 +3686,6 @@ void kmem_cache_free_bulk(struct kmem_cache *orig_s, size_t size, void **p) } EXPORT_SYMBOL(kmem_cache_free_bulk); -/** - * kfree - free previously allocated memory - * @objp: pointer returned by kmalloc. - * - * If @objp is NULL, no operation is performed. - * - * Don't free memory not originally allocated by kmalloc() - * or you will run into trouble. - */ -void kfree(const void *objp) -{ - struct kmem_cache *c; - unsigned long flags; - struct folio *folio; - - trace_kfree(_RET_IP_, objp); - - if (unlikely(ZERO_OR_NULL_PTR(objp))) - return; - - folio = virt_to_folio(objp); - if (!folio_test_slab(folio)) { - free_large_kmalloc(folio, (void *)objp); - return; - } - - c = folio_slab(folio)->slab_cache; - - local_irq_save(flags); - kfree_debugcheck(objp); - debug_check_no_locks_freed(objp, c->object_size); - debug_check_no_obj_freed(objp, c->object_size); - __cache_free(c, (void *)objp, _RET_IP_); - local_irq_restore(flags); -} -EXPORT_SYMBOL(kfree); - /* * This initializes kmem_cache_node or resizes various caches for all nodes. */ @@ -4169,30 +4088,3 @@ void __check_heap_object(const void *ptr, unsigned long n, usercopy_abort("SLAB object", cachep->name, to_user, offset, n); } #endif /* CONFIG_HARDENED_USERCOPY */ - -/** - * __ksize -- Uninstrumented ksize. - * @objp: pointer to the object - * - * Unlike ksize(), __ksize() is uninstrumented, and does not provide the same - * safety checks as ksize() with KASAN instrumentation enabled. - * - * Return: size of the actual memory used by @objp in bytes - */ -size_t __ksize(const void *objp) -{ - struct kmem_cache *c; - struct folio *folio; - - BUG_ON(!objp); - if (unlikely(objp == ZERO_SIZE_PTR)) - return 0; - - folio = virt_to_folio(objp); - if (!folio_test_slab(folio)) - return folio_size(folio); - - c = folio_slab(folio)->slab_cache; - return c->object_size; -} -EXPORT_SYMBOL(__ksize); -- cgit v1.2.3