From patchwork Thu Apr 2 14:52:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 11470943 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 451851668 for ; Thu, 2 Apr 2020 14:55:52 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 1A59120719 for ; Thu, 2 Apr 2020 14:55:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NjemHtGC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A59120719 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:41942 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jK1G3-0007a6-7y for patchwork-qemu-devel@patchwork.kernel.org; Thu, 02 Apr 2020 10:55:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39683) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jK1DR-0002Mm-EX for qemu-devel@nongnu.org; Thu, 02 Apr 2020 10:53:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jK1DQ-0000IW-Av for qemu-devel@nongnu.org; Thu, 02 Apr 2020 10:53:09 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:34949 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jK1DP-0000HY-N1 for qemu-devel@nongnu.org; Thu, 02 Apr 2020 10:53:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585839186; 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=NjemHtGC2xoy3nEf8YykpD34BT+u57PRx3kooCjpbXM5oMl0sHIsiW0nCVz/PwAtG4jO8n fWGl/JyFteprYRY0xx9YaN5BlMXQN4i8U/R0THM/nYG3MSAseaYpE9Vd2BjAi+GCaGc17s ps5kZKTz+FbIfko2nC1IwcegdHKSscc= 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-429-5QyVT9ZHPAKQZ97M2o1qqw-1; Thu, 02 Apr 2020 10:53:02 -0400 X-MC-Unique: 5QyVT9ZHPAKQZ97M2o1qqw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0AA5A8024DC; Thu, 2 Apr 2020 14:53:01 +0000 (UTC) Received: from laptop.redhat.com (ovpn-112-58.ams2.redhat.com [10.36.112.58]) by smtp.corp.redhat.com (Postfix) with ESMTP id 675655DA7C; Thu, 2 Apr 2020 14:52:49 +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 Subject: [kvm-unit-tests PATCH v8 02/13] page_alloc: Introduce get_order() Date: Thu, 2 Apr 2020 16:52:16 +0200 Message-Id: <20200402145227.20109-3-eric.auger@redhat.com> In-Reply-To: <20200402145227.20109-1-eric.auger@redhat.com> References: <20200402145227.20109-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, andre.przywara@arm.com, thuth@redhat.com, yuzenghui@huawei.com, alexandru.elisei@arm.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" 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 size) if (!size) return NULL; - order = is_power_of_2(n) ? fls(n) : fls(n) + 1; + order = get_order(n); return alloc_pages(order); } @@ -175,3 +175,8 @@ void page_alloc_ops_enable(void) { alloc_ops = &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); #endif