From patchwork Fri Aug 22 09:26:06 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 382120 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id EF8261400B2 for ; Fri, 22 Aug 2014 19:27:27 +1000 (EST) Received: from localhost ([::1]:35892 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XKl82-0005tX-20 for incoming@patchwork.ozlabs.org; Fri, 22 Aug 2014 05:27:26 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40485) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XKl7T-00057C-ER for qemu-devel@nongnu.org; Fri, 22 Aug 2014 05:26:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XKl7N-00031b-7H for qemu-devel@nongnu.org; Fri, 22 Aug 2014 05:26:51 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:49072 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XKl7M-00031K-S2 for qemu-devel@nongnu.org; Fri, 22 Aug 2014 05:26:45 -0400 Received: (qmail 4807 invoked by uid 89); 22 Aug 2014 09:26:43 -0000 Received: from [82.141.1.145] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.98.4/19300. hbedv: 8.3.24.18/7.11.168.158. spamassassin: 3.4.0. Clear:RC:1(82.141.1.145):SA:0(-1.2/4.0):. Processed in 1.791067 secs); 22 Aug 2014 09:26:43 -0000 Received: from ns.kamp-intra.net (HELO dns.kamp-intra.net) ([82.141.1.145]) by mx01.kamp.de with SMTP; 22 Aug 2014 09:26:41 -0000 X-GL_Whitelist: yes Received: from lieven-pc.kamp-intra.net (lieven-pc.kamp-intra.net [172.21.12.60]) by dns.kamp-intra.net (Postfix) with ESMTP id 8FA632068F; Fri, 22 Aug 2014 11:26:11 +0200 (CEST) Received: by lieven-pc.kamp-intra.net (Postfix, from userid 1000) id 869045FE2A; Fri, 22 Aug 2014 11:26:11 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Fri, 22 Aug 2014 11:26:06 +0200 Message-Id: <1408699567-6940-2-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1408699567-6940-1-git-send-email-pl@kamp.de> References: <1408699567-6940-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2a02:248:0:51::16 Cc: kwolf@redhat.com, pbonzini@redhat.com, Peter Lieven , stefanha@redhat.com Subject: [Qemu-devel] [PATCH 1/2] util: introduce bitmap_try_new X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org regular bitmap_new simply aborts if the memory allocation fails. bitmap_try_new returns NULL on failure and allows for proper error handling. Signed-off-by: Peter Lieven --- include/qemu/bitmap.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h index 1babd5d..51b430f 100644 --- a/include/qemu/bitmap.h +++ b/include/qemu/bitmap.h @@ -94,6 +94,12 @@ static inline unsigned long *bitmap_new(long nbits) return g_malloc0(len); } +static inline unsigned long *bitmap_try_new(long nbits) +{ + long len = BITS_TO_LONGS(nbits) * sizeof(unsigned long); + return g_try_malloc0(len); +} + static inline void bitmap_zero(unsigned long *dst, long nbits) { if (small_nbits(nbits)) {