mm-slab-fix-variable-obj_exts-set-but-not-used-warning.patch removed from -mm tree

The quilt patch titled
Subject: mm/slab: fix 'variable obj_exts set but not used' warning
has been removed from the -mm tree. Its filename was
mm-slab-fix-variable-obj_exts-set-but-not-used-warning.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Suren Baghdasaryan <[email protected]>
Subject: mm/slab: fix 'variable obj_exts set but not used' warning
Date: Fri, 14 Jun 2024 15:59:51 -0700

slab_post_alloc_hook() uses prepare_slab_obj_exts_hook() to obtain slabobj_ext object. Currently the only user of slabobj_ext object in this path is memory allocation profiling, therefore when it's not enabled this object is not needed. This also generates a warning when compiling with CONFIG_MEM_ALLOC_PROFILING=n. Move the code under this configuration to fix the warning. If more slabobj_ext users appear in the future, the code will have to be changed back to call prepare_slab_obj_exts_hook().

---

 mm/slub.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

@@ -3902,7 +3902,6 @@ bool slab_post_alloc_hook(struct kmem_ca
 			  unsigned int orig_size)
 {
 	unsigned int zero_size = s->object_size;
-	struct slabobj_ext *obj_exts;
 	bool kasan_init = init;
 	size_t i;
 	gfp_t init_flags = flags & gfp_allowed_mask;

@@ -3945,9 +3944,11 @@ bool slab_post_alloc_hook(struct kmem_ca
 		kmemleak_alloc_recursive(p[i], s->object_size, 1,
 					 s->flags, init_flags);
 		kmsan_slab_alloc(s, p[i], init_flags);
+#ifdef CONFIG_MEM_ALLOC_PROFILING
 		if (need_slab_obj_ext()) {
+			struct slabobj_ext *obj_exts;
+
 			obj_exts = prepare_slab_obj_exts_hook(s, flags, p[i]);
-#ifdef CONFIG_MEM_ALLOC_PROFILING
 			/*
 			 * Currently obj_exts is used only for allocation profiling.
 			 * If other users appear then mem_alloc_profiling_enabled()

@@ -3955,8 +3956,8 @@ bool slab_post_alloc_hook(struct kmem_ca
 			 */
 			if (likely(obj_exts))
 				alloc_tag_add(&obj_exts->ref, current->alloc_tag, s->size);
-#endif
 		}
+#endif
 	}
 
 	return memcg_slab_post_alloc_hook(s, lru, flags, size, p);

_

Patches currently in -mm which might be from [email protected] are

lib-dump_stack-report-process-uid-in-dump_stack_print_info.patch