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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 6D127C433B4 for ; Fri, 30 Apr 2021 15:06:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E735B6142A for ; Fri, 30 Apr 2021 15:06:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E735B6142A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 59DEF6B006C; Fri, 30 Apr 2021 11:06:05 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 561D56B006E; Fri, 30 Apr 2021 11:06:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 42A0B6B0070; Fri, 30 Apr 2021 11:06:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0110.hostedemail.com [216.40.44.110]) by kanga.kvack.org (Postfix) with ESMTP id 27CDA6B006C for ; Fri, 30 Apr 2021 11:06:05 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D5BD312E7 for ; Fri, 30 Apr 2021 15:06:04 +0000 (UTC) X-FDA: 78089358648.27.90255DC Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf26.hostedemail.com (Postfix) with ESMTP id DA57540002D7 for ; Fri, 30 Apr 2021 15:05:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=27fvFe0ryVXLSHC2zpPkvk9Wh4j4iIi9y7tCdwHH8bI=; b=bCgiIdKZfp8hXijO5K4VjhQ28z tTQSVyYOncTCLiLNpnXnX0OzkI2qxbG1JPGV+qDLPEc4LrJ6cOdEK94+EsWsz5JWlsrqLj3XNZvT9 mzlI0+Gy6xogrBpja/O3M0wCbnYTtJctrJeVjI3Puocw4WDH5aCeNFM0B3xiN8QODLE/TrU31165p J5zFbfQ4BB9ssEVO5AIx00ppKIMBoKzUTfYTA4Go7oVEDyBqixdxB+LX0o6dhyFuy5DnyhG0bUPZB Qyb31kio9TMyimzvJwWzTc+XKZXd0SZktx4Z5i1H/ztGpLDCBYXrzDDs5u/9eAkHLDtENd+FKkpmF byJqO0iQ==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lcUgc-00BBFh-KU; Fri, 30 Apr 2021 15:04:40 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, akpm@linux-foundation.org Cc: "Matthew Wilcox (Oracle)" , William Kucharski , Vlastimil Babka , Anshuman Khandual Subject: [PATCH 7/8] mm: Constify page_count and page_ref_count Date: Fri, 30 Apr 2021 15:55:48 +0100 Message-Id: <20210430145549.2662354-8-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210430145549.2662354-1-willy@infradead.org> References: <20210430145549.2662354-1-willy@infradead.org> MIME-Version: 1.0 X-Stat-Signature: y3zhprjcs3ic7cpi6h5dzsosbkcnf8yp X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: DA57540002D7 Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=bCgiIdKZ; spf=none (imf26.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none Received-SPF: none (infradead.org>: No applicable sender policy available) receiver=imf26; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1619795154-154367 Content-Transfer-Encoding: quoted-printable 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 compound_head() accepts a const struct page pointer, these two functions can be marked as not modifying the page pointer they are passed= . Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: William Kucharski Reviewed-by: Vlastimil Babka Reviewed-by: Anshuman Khandual --- include/linux/page_ref.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h index f3318f34fc54..7ad46f45df39 100644 --- a/include/linux/page_ref.h +++ b/include/linux/page_ref.h @@ -62,12 +62,12 @@ static inline void __page_ref_unfreeze(struct page *p= age, int v) =20 #endif =20 -static inline int page_ref_count(struct page *page) +static inline int page_ref_count(const struct page *page) { return atomic_read(&page->_refcount); } =20 -static inline int page_count(struct page *page) +static inline int page_count(const struct page *page) { return atomic_read(&compound_head(page)->_refcount); } --=20 2.30.2