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=-6.5 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 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 1F972C4332D for ; Fri, 20 Mar 2020 09:24:58 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id CB59C20752 for ; Fri, 20 Mar 2020 09:24:57 +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="YkZnqURO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CB59C20752 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 8408F4B094; Fri, 20 Mar 2020 05:24:57 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@redhat.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WJKoOn+5pVu2; Fri, 20 Mar 2020 05:24:56 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 744944B08F; Fri, 20 Mar 2020 05:24:56 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3F20A4B08C for ; Fri, 20 Mar 2020 05:24:55 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kMdzJmAITu7m for ; Fri, 20 Mar 2020 05:24:54 -0400 (EDT) Received: from us-smtp-delivery-74.mimecast.com (us-smtp-delivery-74.mimecast.com [63.128.21.74]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 4B1084A5A0 for ; Fri, 20 Mar 2020 05:24:54 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1584696294; 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=YkZnqUROJXa6QMWLvuVu3JWIzN6xrCjFJdrHZXoYFoXf6Yf+Kn9cwDV7BPe0RSC7zzqdcE r9wgx5bKSQsBQq40CJnq3iDrPdu357PtXwZr6QHAkIQ9ijUGI4BpAwKaIfRf+O7+G9i9ny HDAGXaNaLqWOiY8Vbsh7XzA5zCu/Jww= 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-398-OsWFrT5gNDeelXWk7ftxug-1; Fri, 20 Mar 2020 05:24:50 -0400 X-MC-Unique: OsWFrT5gNDeelXWk7ftxug-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0F4311005514; Fri, 20 Mar 2020 09:24:49 +0000 (UTC) Received: from laptop.redhat.com (ovpn-113-142.ams2.redhat.com [10.36.113.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 240475C1D8; Fri, 20 Mar 2020 09:24:45 +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 v7 02/13] page_alloc: Introduce get_order() Date: Fri, 20 Mar 2020 10:24:17 +0100 Message-Id: <20200320092428.20880-3-eric.auger@redhat.com> In-Reply-To: <20200320092428.20880-1-eric.auger@redhat.com> References: <20200320092428.20880-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Cc: andre.przywara@arm.com, thuth@redhat.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm