+ mm-slab-add-is_kmalloc_cache-helper-function.patch added to mm-unstable branch

+ mm-slab-add-is_kmalloc_cache-helper-function.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/slab: add is_kmalloc_cache() helper function
has been added to the -mm mm-unstable branch.  Its filename is
     mm-slab-add-is_kmalloc_cache-helper-function.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-slab-add-is_kmalloc_cache-helper-function.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: Feng Tang <feng.tang@intel.com>
Subject: mm/slab: add is_kmalloc_cache() helper function
Date: Wed, 4 Jan 2023 14:06:04 +0800

commit 6edf2576a6cc ("mm/slub: enable debugging memory wasting of
kmalloc") introduces 'SLAB_KMALLOC' bit specifying whether a kmem_cache is
a kmalloc cache for slab/slub (slob doesn't have dedicated kmalloc
caches).

Add a helper inline function for other components like kasan to simplify
code.

Link: https://lkml.kernel.org/r/20230104060605.930910-1-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/slab.h |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/mm/slab.h~mm-slab-add-is_kmalloc_cache-helper-function
+++ a/mm/slab.h
@@ -323,6 +323,14 @@ static inline slab_flags_t kmem_cache_fl
 }
 #endif
 
+static inline bool is_kmalloc_cache(struct kmem_cache *s)
+{
+#ifndef CONFIG_SLOB
+	return (s->flags & SLAB_KMALLOC);
+#else
+	return false;
+#endif
+}
 
 /* Legal flag mask for kmem_cache_create(), for various configurations */
 #define SLAB_CORE_FLAGS (SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA | \
_

Patches currently in -mm which might be from feng.tang@intel.com are

mm-slab-add-is_kmalloc_cache-helper-function.patch
mm-kasan-simplify-and-refine-kasan_cache-code.patch