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=-9.5 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,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 49A6CC433E0 for ; Wed, 10 Jun 2020 20:16:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 196CC2065C for ; Wed, 10 Jun 2020 20:16:42 +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="kzXLN9R5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730902AbgFJUQk (ORCPT ); Wed, 10 Jun 2020 16:16:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730549AbgFJUNu (ORCPT ); Wed, 10 Jun 2020 16:13:50 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 557C8C00862D; Wed, 10 Jun 2020 13:13:48 -0700 (PDT) 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=ZdmHI6xA8It9U2TlgFLx4kPuqY4+rF2vVFre5EFi3Ak=; b=kzXLN9R5EqQ0rOFb3IvKNQFB95 gcRS4OD44bdayszrjbTk5VR2un4Ss2fUTtW86fPimwIsWyHg9S8wTmoag/6dtNpsyaBfBRgVnuZEv VVevEOiXoa1RCDIuimQ7iOalqNeUusacHTopUoDke0oCtn/XDQkk9zDB4d4bWZDnEWxyQDV/PqNlo dZGOScNRnJpoyKJWYoSeakEOz2CQ03uOWGE+ZXJE+MW3iGv/pI2KqfA1DAbQQn5E3s7PjtXvFMqSl OvH/poDMCVaIQB/DZa3mOYICYxSbiH+e3zsvgr43516uZdgqTE+ZZMRAUWXkOFKPC/Qhn7KYnvg/T E2AE87Ng==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jj76Z-0003U6-NE; Wed, 10 Jun 2020 20:13:47 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Hildenbrand Subject: [PATCH v6 12/51] mm: Introduce offset_in_thp Date: Wed, 10 Jun 2020 13:13:06 -0700 Message-Id: <20200610201345.13273-13-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200610201345.13273-1-willy@infradead.org> References: <20200610201345.13273-1-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)" Mirroring offset_in_page(), this gives you the offset within this particular page, no matter what size page it is. It optimises down to offset_in_page() if CONFIG_TRANSPARENT_HUGEPAGE is not set. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Hildenbrand --- include/linux/mm.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 6c29b663135f..3fc7e8121216 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1583,6 +1583,7 @@ static inline void clear_page_pfmemalloc(struct page *page) extern void pagefault_out_of_memory(void); #define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK) +#define offset_in_thp(page, p) ((unsigned long)(p) & (thp_size(page) - 1)) /* * Flags passed to show_mem() and show_free_areas() to suppress output in -- 2.26.2