mm: slub: share object_err function

Remove static and add function declarations to linux/slub_def.h so it
could be used by kernel address sanitizer.

Signed-off-by: Andrey Ryabinin <[e-mail]>
Cc: Dmitry Vyukov <[e-mail]>
Cc: Konstantin Serebryany <[e-mail]>
Cc: Dmitry Chernenkov <[e-mail]>
Signed-off-by: Andrey Konovalov <[e-mail]>
Cc: Yuri Gribov <[e-mail]>
Cc: Konstantin Khlebnikov <[e-mail]>
Cc: Sasha Levin <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: Joonsoo Kim <[e-mail]>
Cc: Dave Hansen <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: "H. Peter Anvin" <[e-mail]>
Cc: Christoph Lameter <[e-mail]>
Cc: Pekka Enberg <[e-mail]>
Cc: David Rientjes <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/slub_def.h

···
 	return (void *)x - ((x - slab_page) % s->size);
 }
 
+void object_err(struct kmem_cache *s, struct page *page,
+		u8 *object, char *reason);
+
 #endif /* _LINUX_SLUB_DEF_H */

mm/slub.c

···
 	dump_stack();
 }
 
-static void object_err(struct kmem_cache *s, struct page *page,
+void object_err(struct kmem_cache *s, struct page *page,
 			u8 *object, char *reason)
 {
 	slab_bug(s, "%s", reason);