--- zzzz-none-000/linux-4.1.52/mm/slab.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/mm/slab.c	2022-03-02 11:37:13.000000000 +0000
@@ -122,6 +122,10 @@
 #include	<asm/cacheflush.h>
 #include	<asm/tlbflush.h>
 #include	<asm/page.h>
+#if defined(CONFIG_AVM_ENHANCED)
+#include	<asm/avm_enh/avm_enh.h>
+#endif/*--- #if defined(CONFIG_AVM_ENHANCED) ---*/
+
 
 #include <trace/events/kmem.h>
 
@@ -4245,3 +4249,59 @@
 	return virt_to_cache(objp)->object_size;
 }
 EXPORT_SYMBOL(ksize);
+
+#if defined(CONFIG_AVM_ENHANCED)
+/**
+ * @brief get kmemalloc-area if addr in range 
+ *		  attention! function unsaved for cachep - zone-page-spinlock necessary
+ * @return start (zero if not exist)
+ */
+unsigned long get_kmemalloc_area(unsigned long addr, unsigned long *caller, const char **cache_name, 
+								 unsigned long *size, int *freed){
+	unsigned long flags, kstart;
+	struct kmem_cache_node *n;
+	unsigned int objnr, _freed = 0;
+	struct kmem_cache *cachep;
+	struct page *page = virt_to_head_page((void *)addr);
+
+	if(!virt_addr_valid(page)) {
+		return 0;
+	}
+	cachep = page->slab_cache;
+	if(!virt_addr_valid(cachep)) {
+		return 0;
+	}
+	n = cachep->node[numa_mem_id()];
+	if(!virt_addr_valid(n)) {
+		return 0;
+	}
+	if(!spin_trylock_irqsave(&n->list_lock, flags)) {
+		return 0;
+	}
+	objnr = obj_to_index(cachep, page, (void *)addr);
+	if(objnr >= cachep->num) {
+		spin_unlock_irqrestore(&n->list_lock, flags);
+		return 0;
+	}
+	if(caller)  {
+#if defined(CONFIG_DEBUG_SLAB_DOUBLE_FREE) || defined(CONFIG_DEBUG_SLAB_LEAK)
+		if (get_obj_status(page, objnr) != OBJECT_ACTIVE) {
+			_freed = 1;
+		}
+#endif/*--- #if defined(CONFIG_DEBUG_SLAB_DOUBLE_FREE) || defined(CONFIG_DEBUG_SLAB_LEAK) ---*/
+		 *caller = 
+#if defined(CONFIG_DEBUG_SLAB_AVM_LITE)
+				_freed ?  get_slab_enh(cachep, page, objnr)->free_caller : get_slab_enh(cachep, page, objnr)->caller;
+#else /*--- #if defined(CONFIG_DEBUG_SLAB_AVM_LITE) ---*/
+					0UL;
+#endif /*--- #else  ---*//*--- #if defined(CONFIG_DEBUG_SLAB_AVM_LITE) ---*/
+	}
+	/*--- 	dump_slab("slab", page, cachep, objnr); ---*/
+	if(cache_name) *cache_name = cachep->name;
+	if(size)	   *size	   = cachep->size;
+	if(freed)      *freed	   = _freed;
+	kstart = (unsigned long)index_to_obj(cachep, page, objnr);
+	spin_unlock_irqrestore(&n->list_lock, flags);
+	return kstart;
+}
+#endif /*--- #if defined(CONFIG_AVM_ENHANCED) ---*/