From patchwork Fri Jan 31 06:15:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11359275 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A612A92A for ; Fri, 31 Jan 2020 06:15:19 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 72B652082E for ; Fri, 31 Jan 2020 06:15:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="qrf1DZ+/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 72B652082E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 45E866B0551; Fri, 31 Jan 2020 01:15:12 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 3E5E56B0553; Fri, 31 Jan 2020 01:15:12 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 212DA6B0554; Fri, 31 Jan 2020 01:15:12 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0212.hostedemail.com [216.40.44.212]) by kanga.kvack.org (Postfix) with ESMTP id EC8896B0551 for ; Fri, 31 Jan 2020 01:15:11 -0500 (EST) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 9DC7D181AEF09 for ; Fri, 31 Jan 2020 06:15:11 +0000 (UTC) X-FDA: 76436916822.17.ghost90_2d51c79e4b220 X-Spam-Summary: 2,0,0,9ac41891c6e51f55,d41d8cd98f00b204,akpm@linux-foundation.org,:akpm@linux-foundation.org:arnd@arndb.de:david@redhat.com::mm-commits@vger.kernel.org:torvalds@linux-foundation.org:yuzhao@google.com,RULES_HIT:41:355:379:800:960:967:968:973:988:989:1260:1263:1345:1359:1381:1431:1437:1534:1541:1711:1730:1747:1777:1792:2198:2199:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3352:3865:3866:3867:3870:3872:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4321:5007:6261:6653:7576:8599:9025:9545:9592:10004:10913:11026:11473:11658:11914:12043:12048:12296:12297:12438:12517:12519:12555:12679:12783:12986:13069:13161:13229:13255:13311:13357:13846:14181:14384:14721:14849:21080:21451:21627:21939:30054:30070,0,RBL:error,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:1,LUA_SUMMARY:none X-HE-Tag: ghost90_2d51c79e4b220 X-Filterd-Recvd-Size: 2653 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf37.hostedemail.com (Postfix) with ESMTP for ; Fri, 31 Jan 2020 06:15:11 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8CB2F21734; Fri, 31 Jan 2020 06:15:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580451310; bh=4SttZdj4ggV5V605QMJUmnUWrHBAPiOs1bm1XY2+euA=; h=Date:From:To:Subject:In-Reply-To:From; b=qrf1DZ+/qBj+pxdtuxgVPnTVyB4tRNjnaLGr1SeFFDpyIXqcCwh2NqDg+X7+4f+ts dXPwuj1Ihz3+cVx/5X62ZR99KBHRMuwZaXQ3PpFR5pF+pyxq+DsUq/bKvMNhVhaFwe a1Avyn88FINPBq6W4PD+Rc0PemPiAIYeG/W6MQp8= Date: Thu, 30 Jan 2020 22:15:10 -0800 From: Andrew Morton To: akpm@linux-foundation.org, arnd@arndb.de, david@redhat.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, yuzhao@google.com Subject: [patch 075/118] include/linux/mm.h: clean up obsolete check on space in page->flags Message-ID: <20200131061510.AX4sUc5J4%akpm@linux-foundation.org> In-Reply-To: <20200130221021.5f0211c56346d5485af07923@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: Yu Zhao Subject: include/linux/mm.h: clean up obsolete check on space in page->flags The check was intended to make sure we don't overrun page flags. But it's obsolete because it doesn't include LAST_CPUPID_WIDTH nor KASAN_TAG_WIDTH. Just remove check since we already have it covered in linux/page-flags-layout.h (near the end of the file). Link: http://lkml.kernel.org/r/20191208183508.89177-1-yuzhao@google.com Signed-off-by: Yu Zhao Reviewed-by: David Hildenbrand Cc: Arnd Bergmann Signed-off-by: Andrew Morton --- include/linux/mm.h | 4 ---- 1 file changed, 4 deletions(-) --- a/include/linux/mm.h~mm-clean-up-obsolete-check-on-space-in-page-flags +++ a/include/linux/mm.h @@ -916,10 +916,6 @@ vm_fault_t finish_mkwrite_fault(struct v #define ZONEID_PGSHIFT (ZONEID_PGOFF * (ZONEID_SHIFT != 0)) -#if SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS -#error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS -#endif - #define ZONES_MASK ((1UL << ZONES_WIDTH) - 1) #define NODES_MASK ((1UL << NODES_WIDTH) - 1) #define SECTIONS_MASK ((1UL << SECTIONS_WIDTH) - 1)