mm/sl?b.c: remove ctor argument from kmem_cache_flags

This argument hasn't been used since e153362a ("slub: Remove objsize
check in kmem_cache_flags()") so simply remove it.

Link: https://lkml.kernel.org/r/20210126095733.974665-1-nborisov@suse.comSigned-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/slab.c

@@ -1790,8 +1790,7 @@ static int __ref setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
 }
 
 slab_flags_t kmem_cache_flags(unsigned int object_size,
-	slab_flags_t flags, const char *name,
-	void (*ctor)(void *))
+	slab_flags_t flags, const char *name)
 {
 	return flags;
 }

mm/slab.h

@@ -110,8 +110,7 @@ __kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
 		   slab_flags_t flags, void (*ctor)(void *));
 
 slab_flags_t kmem_cache_flags(unsigned int object_size,
-	slab_flags_t flags, const char *name,
-	void (*ctor)(void *));
+	slab_flags_t flags, const char *name);
 #else
 static inline struct kmem_cache *
 __kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
@@ -119,8 +118,7 @@ __kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
 { return NULL; }
 
 static inline slab_flags_t kmem_cache_flags(unsigned int object_size,
-	slab_flags_t flags, const char *name,
-	void (*ctor)(void *))
+	slab_flags_t flags, const char *name)
 {
 	return flags;
 }

mm/slab_common.c

@@ -197,7 +197,7 @@ struct kmem_cache *find_mergeable(unsigned int size, unsigned int align,
 	size = ALIGN(size, sizeof(void *));
 	align = calculate_alignment(flags, align, size);
 	size = ALIGN(size, align);
-	flags = kmem_cache_flags(size, flags, name, NULL);
+	flags = kmem_cache_flags(size, flags, name);
 
 	if (flags & SLAB_NEVER_MERGE)
 		return NULL;

mm/slub.c

@@ -1400,7 +1400,6 @@ __setup("slub_debug", setup_slub_debug);
  * @object_size:	the size of an object without meta data
  * @flags:		flags to set
  * @name:		name of the cache
- * @ctor:		constructor function
  *
  * Debug option(s) are applied to @flags. In addition to the debug
  * option(s), if a slab name (or multiple) is specified i.e.
@@ -1408,8 +1407,7 @@ __setup("slub_debug", setup_slub_debug);
  * then only the select slabs will receive the debug option(s).
  */
 slab_flags_t kmem_cache_flags(unsigned int object_size,
-	slab_flags_t flags, const char *name,
-	void (*ctor)(void *))
+	slab_flags_t flags, const char *name)
 {
 	char *iter;
 	size_t len;
@@ -1474,8 +1472,7 @@ static inline void add_full(struct kmem_cache *s, struct kmem_cache_node *n,
 static inline void remove_full(struct kmem_cache *s, struct kmem_cache_node *n,
 					struct page *page) {}
 slab_flags_t kmem_cache_flags(unsigned int object_size,
-	slab_flags_t flags, const char *name,
-	void (*ctor)(void *))
+	slab_flags_t flags, const char *name)
 {
 	return flags;
 }
@@ -3797,7 +3794,7 @@ static int calculate_sizes(struct kmem_cache *s, int forced_order)
 
 static int kmem_cache_open(struct kmem_cache *s, slab_flags_t flags)
 {
-	s->flags = kmem_cache_flags(s->size, flags, s->name, s->ctor);
+	s->flags = kmem_cache_flags(s->size, flags, s->name);
 #ifdef CONFIG_SLAB_FREELIST_HARDENED
 	s->random = get_random_long();
 #endif