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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 85BCBC3B187 for ; Wed, 12 Feb 2020 04:19:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 50C132082F for ; Wed, 12 Feb 2020 04:19:52 +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="rW9y0pa0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728318AbgBLETo (ORCPT ); Tue, 11 Feb 2020 23:19:44 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:53964 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727999AbgBLESr (ORCPT ); Tue, 11 Feb 2020 23:18:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=ANdAmaI1jIMT7Kwn6UD2dfCdUamGTMd6IuFM7yo8vDk=; b=rW9y0pa0OQFs6gEXOFm+WZ7xoP 5IcA4fr74GkQErjTNoTojWCu6XC1fZGO2XlfB24Lj/WkRXWUHrg78jdigHj21Zy6E6yb1Vn8CYYM7 hFOvs8CgYis/6cUWwendKQCRbsv5WAEeswEP10V4HWjCKjlVS9uTdrvezHOQpbxDiP7snhLAYxPiL UcO/W0Tbt5EzhntD1alLZv5XUsmt0BuoFlO8uf7OtMkvzs+r729MqD4PQP0UPBilNrcdFuqQpS1UH o/+6pZ4hXSumJS+ET+UKTkyAn1/YO1T2aLKmwRFarmeX3zCjkk4WyxLMvDjdXX3aVf+B6g5qoB5I4 Qncws1VA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1jU7-0006oS-8C; Wed, 12 Feb 2020 04:18:47 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Subject: [PATCH v2 18/25] iomap: Inline data shouldn't see large pages Date: Tue, 11 Feb 2020 20:18:38 -0800 Message-Id: <20200212041845.25879-19-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200212041845.25879-1-willy@infradead.org> References: <20200212041845.25879-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Matthew Wilcox (Oracle)" Assert that we're not seeing large pages in functions that read/write inline data, rather than zeroing out the tail. Signed-off-by: Matthew Wilcox (Oracle) --- fs/iomap/buffered-io.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index af1f56408fcd..a7a21b99b3a0 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -224,6 +224,7 @@ iomap_read_inline_data(struct inode *inode, struct page *page, return; BUG_ON(page->index); + BUG_ON(PageCompound(page)); BUG_ON(size > PAGE_SIZE - offset_in_page(iomap->inline_data)); addr = kmap_atomic(page); @@ -710,6 +711,7 @@ iomap_write_end_inline(struct inode *inode, struct page *page, void *addr; WARN_ON_ONCE(!PageUptodate(page)); + BUG_ON(PageCompound(page)); BUG_ON(pos + copied > PAGE_SIZE - offset_in_page(iomap->inline_data)); addr = kmap_atomic(page); -- 2.25.0