diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5fa3a58b5d78..c3fc544b50d2 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1173,12 +1173,18 @@ void __init mem_init(void)
 
 	/* clear_bss() already clear the empty_zero_page */
 
-	register_page_bootmem_info();
-
 	/* this will put all memory onto the freelists */
 	free_all_bootmem();
 	after_bootmem = 1;
 
+	/*
+	 * Must be done after boot memory is put on freelist, because here we
+	 * might set fields in deferred struct pages that have not yet been
+	 * initialized, and free_all_bootmem() initializes all the reserved
+	 * deferred pages for us.
+	 */
+	register_page_bootmem_info();
+
 	/* Register memory areas for /proc/kcore */
 	kclist_add(&kcore_vsyscall, (void *)VSYSCALL_ADDR,
 			 PAGE_SIZE, KCORE_OTHER);