mm: page_alloc: move init_on_alloc/free() into mm_init.c

Since commit f2fc4b44ec2b ("mm: move init_mem_debugging_and_hardening() to
mm/mm_init.c"), the init_on_alloc() and init_on_free() define is better to
move there too.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Kefeng Wang <[e-mail]>
Reviewed-by: Mike Rapoport (IBM) <[e-mail]>
Cc: David Hildenbrand <[e-mail]>
Cc: "Huang, Ying" <[e-mail]>
Cc: Iurii Zaikin <[e-mail]>
Cc: Kees Cook <[e-mail]>
Cc: Len Brown <[e-mail]>
Cc: Luis Chamberlain <[e-mail]>
Cc: Oscar Salvador <[e-mail]>
Cc: Pavel Machek <[e-mail]>
Cc: Rafael J. Wysocki <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

mm/mm_init.c

···
 	__free_pages_core(page, order);
 }
 
+DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_ALLOC_DEFAULT_ON, init_on_alloc);
+EXPORT_SYMBOL(init_on_alloc);
+
+DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_FREE_DEFAULT_ON, init_on_free);
+EXPORT_SYMBOL(init_on_free);
+
 static bool _init_on_alloc_enabled_early __read_mostly
 				= IS_ENABLED(CONFIG_INIT_ON_ALLOC_DEFAULT_ON);
 static int __init early_init_on_alloc(char *buf)

mm/page_alloc.c

···
 
 int percpu_pagelist_high_fraction;
 gfp_t gfp_allowed_mask __read_mostly = GFP_BOOT_MASK;
-DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_ALLOC_DEFAULT_ON, init_on_alloc);
-EXPORT_SYMBOL(init_on_alloc);
-
-DEFINE_STATIC_KEY_MAYBE(CONFIG_INIT_ON_FREE_DEFAULT_ON, init_on_free);
-EXPORT_SYMBOL(init_on_free);
 
 /*
  * A cached value of the page's pageblock's migratetype, used when the page is