From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.7 required=3.0 tests=DATE_IN_PAST_96_XX, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 134F2C43331 for ; Sat, 28 Mar 2020 16:46:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E5CBE2074F for ; Sat, 28 Mar 2020 16:46:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728164AbgC1QqL (ORCPT ); Sat, 28 Mar 2020 12:46:11 -0400 Received: from mx.sdf.org ([205.166.94.20]:50100 "EHLO mx.sdf.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727620AbgC1Qn0 (ORCPT ); Sat, 28 Mar 2020 12:43:26 -0400 Received: from sdf.org (IDENT:lkml@sdf.lonestar.org [205.166.94.16]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 02SGhPTa005210 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO); Sat, 28 Mar 2020 16:43:25 GMT Received: (from lkml@localhost) by sdf.org (8.15.2/8.12.8/Submit) id 02SGhPmY017434; Sat, 28 Mar 2020 16:43:25 GMT Message-Id: <202003281643.02SGhPmY017434@sdf.org> From: George Spelvin Date: Thu, 3 Oct 2019 05:51:56 -0400 Subject: [RFC PATCH v1 46/50] mm/shuffle.c: use get_random_max() To: linux-kernel@vger.kernel.org, lkml@sdf.org Cc: Dan Williams , Qian Cai , Kees Cook , Michal Hocko , Andrew Morton , linux-mm@kvack.org Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that we have it, this is an example of where it helps. Signed-off-by: George Spelvin Cc: Dan Williams Cc: Qian Cai Cc: Kees Cook Cc: Michal Hocko Cc: Andrew Morton Cc: linux-mm@kvack.org --- mm/shuffle.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/shuffle.c b/mm/shuffle.c index b3fe97fd66541..e0ed247f8d907 100644 --- a/mm/shuffle.c +++ b/mm/shuffle.c @@ -135,7 +135,7 @@ void __meminit __shuffle_zone(struct zone *z) * in the zone. */ j = z->zone_start_pfn + - ALIGN_DOWN(get_random_long() % z->spanned_pages, + ALIGN_DOWN(get_random_max(z->spanned_pages), order_pages); page_j = shuffle_valid_page(j, order); if (page_j && page_j != page_i) -- 2.26.0