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=-17.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham 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 ED96FC43603 for ; Sun, 8 Dec 2019 18:36:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C4D2620663 for ; Sun, 8 Dec 2019 18:36:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="X8LjnoaR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726562AbfLHSfU (ORCPT ); Sun, 8 Dec 2019 13:35:20 -0500 Received: from mail-pg1-f201.google.com ([209.85.215.201]:55529 "EHLO mail-pg1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726505AbfLHSfT (ORCPT ); Sun, 8 Dec 2019 13:35:19 -0500 Received: by mail-pg1-f201.google.com with SMTP id v30so7180694pga.22 for ; Sun, 08 Dec 2019 10:35:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=ixWIA9Xc+ETFQTzqRrRYkwHRDWzy5HKinpXuACLsz9s=; b=X8LjnoaR7GpaoOPBGLL4k3WuIlrf8FLlHQkZ9XafcLIvGj8BeyML+sx8jG7mBCR2oH /UV9k8l9nffa3wGxrpHvPgyE8/wQrUm/0pAlDXHmHhLlyxwCZ3mYSypOmqYLPV8w7K3j MRSkdR7QZ7VfwYpbHPgQyBi01pcdVbZjuhmWVp2x1zkXo0YOTh04wkF7wP0vBtzXqJ0X YE8hDo5nt7ortxZQJZS8crVJXU8h+NKeG3hjaKC2NxPH7ORoglXxXmuxRhIGE8p+bRtF iUAvRJXgy1MX4mxbgiYbXhcssEYmrobZXdY7fo4MPxo/kry/W7qje7lDx46zUofdTIuS 3BNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=ixWIA9Xc+ETFQTzqRrRYkwHRDWzy5HKinpXuACLsz9s=; b=uO8PGKycZ7SgncIVIih0bs6FGLi9Do1uvcouTz9z8j2b7u2AfTTJKhSuEEcVymItIq 1/IazymNQDpF0KHqh5M/IP9D8BYvhvCQ1lxhwCgkXkVo4aRjYbGp2ImEQMTsJcc6PhOs 7sFqTxsWYHTtie5UnZgB+44CtA6FV9Ng+wEvtItMzwyJ9cmyPebZyFbyk0ATmGBGbMn0 3rCmkGEXIplQd4P+UtsW+h2sMPJTYhg0g5SYQjOeXC0tFU8z5od2i9n3i5cpvrpM7BhI ZLkWlYcOzEa/HxzL8BlZhqvR6qKfT4p3T/QNUjso4/OuukH4kcAozn8eI7zGZ0GnW0xS hihA== X-Gm-Message-State: APjAAAUlfFPIHM9rQ36uFyTFbD3HSPfgoDMFRp0kjgUhlUA/Vpscrwid vDYM0+WZTLAQqVZ4cjXewoB4pkcCwmI= X-Google-Smtp-Source: APXvYqxJDXiMqtoqT89fWhET1T4Uha1d/oTBLwOyi1Od4C660mnuOKD/jnEMMYHWk8RdBuDq/Y/d37eF1/E= X-Received: by 2002:a63:3756:: with SMTP id g22mr14745071pgn.375.1575830118968; Sun, 08 Dec 2019 10:35:18 -0800 (PST) Date: Sun, 8 Dec 2019 11:35:07 -0700 Message-Id: <20191208183508.89177-1-yuzhao@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH] mm: clean up obsolete check on space in page->flags From: Yu Zhao To: Andrew Morton , Arnd Bergmann Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Yu Zhao Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The check in linux/mm.h 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). Signed-off-by: Yu Zhao --- include/linux/mm.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index c97ea3b694e6..2e7596cce9d8 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -921,10 +921,6 @@ vm_fault_t finish_mkwrite_fault(struct vm_fault *vmf); #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) -- 2.24.0.393.g34dc348eaf-goog