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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 C8DD2C18E5A for ; Tue, 10 Mar 2020 14:54:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9F473222C3 for ; Tue, 10 Mar 2020 14:54:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Q/LVM0A1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727547AbgCJOyb (ORCPT ); Tue, 10 Mar 2020 10:54:31 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:35158 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727390AbgCJOyb (ORCPT ); Tue, 10 Mar 2020 10:54:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583852070; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jUPGPmIvaDDGzVaAE49y1ve21avwQxlD6sBJrt5aqiw=; b=Q/LVM0A1oLXRTHC2mSy9VDDF9lwajnvN3DdyO+ZXiIs90JWJHUFHeeuKBbptnfaAql69nU aBUsItwToPH8mNKBsCzV5TDToHX29C6S4YUG1G8Kdmh5el47h/6NGZU3xbtqMA/yk0VsW4 mktbCPe6QJId7PiLy0m1pDoH1cQoI3M= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-363-X2jbR5sjN_-1IeYNAHOm9Q-1; Tue, 10 Mar 2020 10:54:29 -0400 X-MC-Unique: X2jbR5sjN_-1IeYNAHOm9Q-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 78519800D4E; Tue, 10 Mar 2020 14:54:27 +0000 (UTC) Received: from laptop.redhat.com (ovpn-117-85.ams2.redhat.com [10.36.117.85]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0C67660FC1; Tue, 10 Mar 2020 14:54:23 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, maz@kernel.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org Cc: drjones@redhat.com, andre.przywara@arm.com, peter.maydell@linaro.org, yuzenghui@huawei.com, alexandru.elisei@arm.com, thuth@redhat.com Subject: [kvm-unit-tests PATCH v5 02/13] page_alloc: Introduce get_order() Date: Tue, 10 Mar 2020 15:53:59 +0100 Message-Id: <20200310145410.26308-3-eric.auger@redhat.com> In-Reply-To: <20200310145410.26308-1-eric.auger@redhat.com> References: <20200310145410.26308-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Content-Transfer-Encoding: quoted-printable Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Compute the power of 2 order of a size. Use it in page_memalign. Other users are looming. Signed-off-by: Eric Auger --- lib/alloc_page.c | 7 ++++++- lib/alloc_page.h | 1 + 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/lib/alloc_page.c b/lib/alloc_page.c index ed23638..7c8461a 100644 --- a/lib/alloc_page.c +++ b/lib/alloc_page.c @@ -155,7 +155,7 @@ static void *page_memalign(size_t alignment, size_t s= ize) if (!size) return NULL; =20 - order =3D is_power_of_2(n) ? fls(n) : fls(n) + 1; + order =3D get_order(n); =20 return alloc_pages(order); } @@ -175,3 +175,8 @@ void page_alloc_ops_enable(void) { alloc_ops =3D &page_alloc_ops; } + +int get_order(size_t size) +{ + return is_power_of_2(size) ? fls(size) : fls(size) + 1; +} diff --git a/lib/alloc_page.h b/lib/alloc_page.h index 739a91d..e6a51d2 100644 --- a/lib/alloc_page.h +++ b/lib/alloc_page.h @@ -15,5 +15,6 @@ void *alloc_pages(unsigned long order); void free_page(void *page); void free_pages(void *mem, unsigned long size); void free_pages_by_order(void *mem, unsigned long order); +int get_order(size_t size); =20 #endif --=20 2.20.1