From patchwork Tue Jun 28 09:01:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 9202341 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 730666075F for ; Tue, 28 Jun 2016 09:21:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6146A28558 for ; Tue, 28 Jun 2016 09:21:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 541D6285D1; Tue, 28 Jun 2016 09:21:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D774C28558 for ; Tue, 28 Jun 2016 09:21:15 +0000 (UTC) Received: from localhost ([::1]:35266 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHpCk-0003Yt-VK for patchwork-qemu-devel@patchwork.kernel.org; Tue, 28 Jun 2016 05:21:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34740) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHouH-0006mQ-6d for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bHouE-0003Ms-2t for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:09 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:59462 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bHouD-0003Mb-Pe for qemu-devel@nongnu.org; Tue, 28 Jun 2016 05:02:06 -0400 Received: (qmail 26778 invoked by uid 89); 28 Jun 2016 09:02:04 -0000 Received: from [195.62.97.28] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.99.2/21804. hbedv: 8.3.40.44/7.12.99.34. avast: 1.2.2/16062800. spamassassin: 3.4.1. Clear:RC:1(195.62.97.28):. Processed in 0.215306 secs); 28 Jun 2016 09:02:04 -0000 Received: from smtp.kamp.de (HELO submission.kamp.de) ([195.62.97.28]) by mx01.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted); 28 Jun 2016 09:02:01 -0000 X-GL_Whitelist: yes Received: (qmail 29672 invoked from network); 28 Jun 2016 09:01:47 -0000 Received: from lieven-pc.kamp-intra.net (HELO lieven-pc) (relay@kamp.de@::ffff:172.21.12.60) by submission.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted) ESMTPA; 28 Jun 2016 09:01:47 -0000 Received: by lieven-pc (Postfix, from userid 1000) id 6071C2084B; Tue, 28 Jun 2016 11:01:46 +0200 (CEST) From: Peter Lieven To: qemu-devel@nongnu.org Date: Tue, 28 Jun 2016 11:01:36 +0200 Message-Id: <1467104499-27517-13-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1467104499-27517-1-git-send-email-pl@kamp.de> References: <1467104499-27517-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a02:248:0:51::16 Subject: [Qemu-devel] [PATCH 12/15] util: add a function to realloc mmapped memory X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, mst@redhat.com, Peter Lieven , dgilbert@redhat.com, mreitz@redhat.com, kraxel@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Peter Lieven --- include/qemu/mmap-alloc.h | 1 + util/mmap-alloc.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/include/qemu/mmap-alloc.h b/include/qemu/mmap-alloc.h index a457721..935a907 100644 --- a/include/qemu/mmap-alloc.h +++ b/include/qemu/mmap-alloc.h @@ -14,5 +14,6 @@ void qemu_ram_munmap(void *ptr, size_t size); * for g_malloc0 and friends. */ void *qemu_anon_ram_mmap(size_t size); void qemu_anon_ram_munmap(void *ptr, size_t size); +void *qemu_anon_ram_remap(void *old_ptr, size_t old_size, size_t new_size); #endif diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c index c099858..5cbe1c5 100644 --- a/util/mmap-alloc.c +++ b/util/mmap-alloc.c @@ -124,3 +124,13 @@ void qemu_anon_ram_munmap(void *ptr, size_t size) munmap(ptr, size); } } + +void *qemu_anon_ram_remap(void *old_ptr, size_t old_size, size_t new_size) +{ + void *ptr = qemu_anon_ram_mmap(new_size); + if (old_ptr) { + memcpy(ptr, old_ptr, old_size); + qemu_anon_ram_munmap(old_ptr, old_size); + } + return ptr; +}