+ mm-kmemleak-make-create_object-return-void.patch added to mm-unstable branch

+ mm-kmemleak-make-create_object-return-void.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/kmemleak: make create_object return void
has been added to the -mm mm-unstable branch.  Its filename is
     mm-kmemleak-make-create_object-return-void.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-kmemleak-make-create_object-return-void.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Liu Shixin <liushixin2@huawei.com>
Subject: mm/kmemleak: make create_object return void
Date: Thu, 1 Sep 2022 10:30:07 +0800

No caller cares about the return value of create_object(), so make it
return void.

Link: https://lkml.kernel.org/r/20220901023007.3471887-1-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kmemleak.c |   21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

--- a/mm/kmemleak.c~mm-kmemleak-make-create_object-return-void
+++ a/mm/kmemleak.c
@@ -604,9 +604,8 @@ static int __save_stack_trace(unsigned l
  * memory block and add it to the object_list and object_tree_root (or
  * object_phys_tree_root).
  */
-static struct kmemleak_object *__create_object(unsigned long ptr, size_t size,
-					     int min_count, gfp_t gfp,
-					     bool is_phys)
+static void __create_object(unsigned long ptr, size_t size,
+			    int min_count, gfp_t gfp, bool is_phys)
 {
 	unsigned long flags;
 	struct kmemleak_object *object, *parent;
@@ -618,7 +617,7 @@ static struct kmemleak_object *__create_
 	if (!object) {
 		pr_warn("Cannot allocate a kmemleak_object structure\n");
 		kmemleak_disable();
-		return NULL;
+		return;
 	}
 
 	INIT_LIST_HEAD(&object->object_list);
@@ -687,7 +686,6 @@ static struct kmemleak_object *__create_
 			 */
 			dump_object_info(parent);
 			kmem_cache_free(object_cache, object);
-			object = NULL;
 			goto out;
 		}
 	}
@@ -698,21 +696,20 @@ static struct kmemleak_object *__create_
 	list_add_tail_rcu(&object->object_list, &object_list);
 out:
 	raw_spin_unlock_irqrestore(&kmemleak_lock, flags);
-	return object;
 }
 
 /* Create kmemleak object which allocated with virtual address. */
-static struct kmemleak_object *create_object(unsigned long ptr, size_t size,
-					     int min_count, gfp_t gfp)
+static void create_object(unsigned long ptr, size_t size,
+			  int min_count, gfp_t gfp)
 {
-	return __create_object(ptr, size, min_count, gfp, false);
+	__create_object(ptr, size, min_count, gfp, false);
 }
 
 /* Create kmemleak object which allocated with physical address. */
-static struct kmemleak_object *create_object_phys(unsigned long ptr, size_t size,
-					     int min_count, gfp_t gfp)
+static void create_object_phys(unsigned long ptr, size_t size,
+			       int min_count, gfp_t gfp)
 {
-	return __create_object(ptr, size, min_count, gfp, true);
+	__create_object(ptr, size, min_count, gfp, true);
 }
 
 /*
_

Patches currently in -mm which might be from liushixin2@huawei.com are

revert-frontswap-remove-support-for-multiple-ops.patch
revert-mm-mark-swap_lock-and-swap_active_head-static.patch
revert-frontswap-simplify-frontswap_register_ops.patch
mm-zswap-replace-zswap_init_started-failed-with-zswap_init_state.patch
mm-zswap-delay-the-initializaton-of-zswap-until-the-first-enablement.patch
mm-zswap-skip-confusing-print-info.patch
mm-thp-simplify-has_transparent_hugepage-by-using-is_builtin.patch
mm-thp-remove-redundant-config_transparent_hugepage.patch
mm-kmemleak-make-create_object-return-void.patch