--- zzzz-none-000/linux-3.10.107/arch/sh/kernel/dwarf.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/sh/kernel/dwarf.c	2021-02-04 17:41:59.000000000 +0000
@@ -993,32 +993,26 @@
 	.rating = 150,
 };
 
-static void dwarf_unwinder_cleanup(void)
+static void __init dwarf_unwinder_cleanup(void)
 {
-	struct rb_node **fde_rb_node = &fde_root.rb_node;
-	struct rb_node **cie_rb_node = &cie_root.rb_node;
+	struct dwarf_fde *fde, *next_fde;
+	struct dwarf_cie *cie, *next_cie;
 
 	/*
 	 * Deallocate all the memory allocated for the DWARF unwinder.
 	 * Traverse all the FDE/CIE lists and remove and free all the
 	 * memory associated with those data structures.
 	 */
-	while (*fde_rb_node) {
-		struct dwarf_fde *fde;
-
-		fde = rb_entry(*fde_rb_node, struct dwarf_fde, node);
-		rb_erase(*fde_rb_node, &fde_root);
+	rbtree_postorder_for_each_entry_safe(fde, next_fde, &fde_root, node)
 		kfree(fde);
-	}
 
-	while (*cie_rb_node) {
-		struct dwarf_cie *cie;
-
-		cie = rb_entry(*cie_rb_node, struct dwarf_cie, node);
-		rb_erase(*cie_rb_node, &cie_root);
+	rbtree_postorder_for_each_entry_safe(cie, next_cie, &cie_root, node)
 		kfree(cie);
-	}
 
+	if (dwarf_reg_pool)
+		mempool_destroy(dwarf_reg_pool);
+	if (dwarf_frame_pool)
+		mempool_destroy(dwarf_frame_pool);
 	kmem_cache_destroy(dwarf_reg_cachep);
 	kmem_cache_destroy(dwarf_frame_cachep);
 }
@@ -1186,17 +1180,13 @@
 			sizeof(struct dwarf_reg), 0,
 			SLAB_PANIC | SLAB_HWCACHE_ALIGN | SLAB_NOTRACK, NULL);
 
-	dwarf_frame_pool = mempool_create(DWARF_FRAME_MIN_REQ,
-					  mempool_alloc_slab,
-					  mempool_free_slab,
-					  dwarf_frame_cachep);
+	dwarf_frame_pool = mempool_create_slab_pool(DWARF_FRAME_MIN_REQ,
+						    dwarf_frame_cachep);
 	if (!dwarf_frame_pool)
 		goto out;
 
-	dwarf_reg_pool = mempool_create(DWARF_REG_MIN_REQ,
-					 mempool_alloc_slab,
-					 mempool_free_slab,
-					 dwarf_reg_cachep);
+	dwarf_reg_pool = mempool_create_slab_pool(DWARF_REG_MIN_REQ,
+						  dwarf_reg_cachep);
 	if (!dwarf_reg_pool)
 		goto out;