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 DDE43C43331 for ; Sat, 28 Mar 2020 16:43:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BA93A2073E for ; Sat, 28 Mar 2020 16:43:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA93A2073E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sdf.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6F2DA6B0036; Sat, 28 Mar 2020 12:43:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6C9C96B0037; Sat, 28 Mar 2020 12:43:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 607798E0005; Sat, 28 Mar 2020 12:43:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0169.hostedemail.com [216.40.44.169]) by kanga.kvack.org (Postfix) with ESMTP id 492FB6B0036 for ; Sat, 28 Mar 2020 12:43:33 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 95BE94DA9 for ; Sat, 28 Mar 2020 16:43:32 +0000 (UTC) X-FDA: 76645341864.22.low96_76324e121c20c X-HE-Tag: low96_76324e121c20c X-Filterd-Recvd-Size: 1867 Received: from mx.sdf.org (mx.sdf.org [205.166.94.20]) by imf27.hostedemail.com (Postfix) with ESMTP for ; Sat, 28 Mar 2020 16:43:32 +0000 (UTC) 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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