mm: Show correct reliable_user_used if PAGE_SIZE is not 4K

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SK3S
CVE: NA

--------------------------------

Previous reliable_user_used was wrong if PAGE_SIZE is not 4K because this
num was calculated by 4 * reliable_user_used_nr_page.

Now reliable_user_used is calculated by (PAGE_SHIFT - 10) *
reliable_user_used_nr_page.
Signed-off-by: NMa Wupeng <mawupeng1@huawei.com>
Reviewed-by: Kefeng Wang<wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

mm/mem_reliable.c

@@ -514,7 +514,8 @@ void reliable_show_mem_info(void)
 		pr_info("task_reliable_limit: %lu kB",
 			task_reliable_limit >> 10);
 		pr_info("reliable_user_used: %ld kB",
-			atomic_long_read(&reliable_user_used_nr_page) * 4);
+			atomic_long_read(&reliable_user_used_nr_page) <<
+			(PAGE_SHIFT - 10));
 	}
 }