From patchwork Thu Sep 10 23:47:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 11769583 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 AD52B92C for ; Thu, 10 Sep 2020 23:47:36 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 810AD221E3 for ; Thu, 10 Sep 2020 23:47:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="U05Aqtga" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 810AD221E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 0E8EB13DCF680; Thu, 10 Sep 2020 16:47:31 -0700 (PDT) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=2001:8b0:10b:1236::1; helo=casper.infradead.org; envelope-from=willy@infradead.org; receiver= Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 9154D13DCF669 for ; Thu, 10 Sep 2020 16:47:19 -0700 (PDT) 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=vqqJRR6FGWwEroRGJxb8U5uLILmsH4BqITcpCA5DevA=; b=U05AqtgaCYnJ76YXpy5uvatIUO 4gsJez3Lmv2YIHzqVvkH55hL0T9ou3I8kpp/oXTKy6kU1LlqgfWtHRftn7h0ITzie7TKczKs6kbWQ YP0Ujt1BCeF7KJJYHCKP29QBx8qH9MCaMOf2Na/DsB4Uz4hqDdRr0fC03NbJKrHuLy09HQgm++d9P uj6bkjm7lAJLFlIl/0HwAO0ZAKXaMbsVmts0U2ukubGjV00JVuq5yaV12E/6TLK3TRb/gkeN0VXUK Ynfmlt15Gc/vj++h8kBVnQvlbnr/B1w4L+ZZsfluR9264QpjbfAzdI6f1BFlfY+8XiJfjJqDdf/hF 4CPSdwHQ==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kGWHV-0001Rh-Pn; Thu, 10 Sep 2020 23:47:10 +0000 From: "Matthew Wilcox (Oracle)" To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v2 3/9] iomap: Use kzalloc to allocate iomap_page Date: Fri, 11 Sep 2020 00:47:01 +0100 Message-Id: <20200910234707.5504-4-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200910234707.5504-1-willy@infradead.org> References: <20200910234707.5504-1-willy@infradead.org> MIME-Version: 1.0 Message-ID-Hash: HSIKFUQCW5EGG5OZUKK3XPTOEYXCCAZW X-Message-ID-Hash: HSIKFUQCW5EGG5OZUKK3XPTOEYXCCAZW X-MailFrom: willy@infradead.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: "Matthew Wilcox (Oracle)" , "Darrick J . Wong" , Christoph Hellwig , linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Dave Kleikamp , jfs-discussion@lists.sourceforge.net, Christoph Hellwig , Dave Chinner X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: We can skip most of the initialisation, although spinlocks still need explicit initialisation as architectures may use a non-zero value to indicate unlocked. The comment is no longer useful as attach_page_private() handles the refcount now. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Dave Chinner Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 330f86b825d7..58a1fd83f2a4 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -49,16 +49,8 @@ iomap_page_create(struct inode *inode, struct page *page) if (iop || i_blocks_per_page(inode, page) <= 1) return iop; - iop = kmalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL); - atomic_set(&iop->read_count, 0); - atomic_set(&iop->write_count, 0); + iop = kzalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL); spin_lock_init(&iop->uptodate_lock); - bitmap_zero(iop->uptodate, PAGE_SIZE / SECTOR_SIZE); - - /* - * migrate_page_move_mapping() assumes that pages with private data have - * their count elevated by 1. - */ attach_page_private(page, iop); return iop; }