From patchwork Mon Jul 8 06:55:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 13726224 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 1DEC6C3DA42 for ; Mon, 8 Jul 2024 06:57:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sQiIq-0002IU-II; Mon, 08 Jul 2024 02:56:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sQiIk-0001hn-0v for qemu-devel@nongnu.org; Mon, 08 Jul 2024 02:56:45 -0400 Received: from mail-pl1-x635.google.com ([2607:f8b0:4864:20::635]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sQiIg-0001vR-8F for qemu-devel@nongnu.org; Mon, 08 Jul 2024 02:56:41 -0400 Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-1fb0d88fd25so22347455ad.0 for ; Sun, 07 Jul 2024 23:56:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1720421794; x=1721026594; darn=nongnu.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=qHDn+thxMw3Ig31uqjhcKUOYvBIP2g0Rv0XxZxkAcRk=; b=O4pOfXWL8hN7msyyNnqEvOs1mQuA/Z+LKsIIRCbTXFrhbFHXDRbaTQ+jKmu0oTv9Zh yQ1emaP7n20aSphm5LfTHfbLOPveEClm9u4w9ZhGvGqZ/HGpFwCGPoDB7SXc2KDZY3N3 GqOdnkv39J+eaAY9hieX5kj/ODJX+VzSVjhF0X23QTGW7ga9Mf2VA8gdTZZO8NpZGa/R hl4TskKTWXcHqA8GErcRnjFgdNZOiTu2U7lxl6I9Nzi38t3YK1Mw7WFH2Ag9L+gyDA03 kGcWeN328wvefQSuyVoVy7RO2t4ZIrQzT2PHwClqyKThs3+Viglb9brmdA4WRoXHYUx1 N+dQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720421794; x=1721026594; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qHDn+thxMw3Ig31uqjhcKUOYvBIP2g0Rv0XxZxkAcRk=; b=hPPJAUi41WRvCQkP/6JCV8IUs+XVHK2CW4rxDhuTXaHP5KPwNG4eu5yXeVQZaYT5Pj rBVcBX3MXplP0EH8uS1gRiz0si2bKOBbPLbQTbuhH5QbSsxlHUpKxrY+PTWdZliKBEK7 fXAOMxKHl6apThSJ/WfR30m9lBsHBdb5oUfwF1XPTwxUAgjXzkfpLwMHwX3PNTWQ7uxA UlpbCfaZjhLDhJhuHYnHaL0pf9x/4A7xmwClyM7gKS+cAt+Ws6N/XO03rFpUF9hy5SrO 88oWq4KwSnuw8LX+OV55NnUdiqVO5ZM6J6ohkBIgtIX5NFAgiiQqKhs1Yj7A5Knn1lQo cKzg== X-Gm-Message-State: AOJu0Yy5kvEFGGoOiAW9llBiwFsKwYlL+Yj2gEEDDv2GoUngF9rLQnP7 g1+4IoC/1zloTCVlwUjlT4AZqr+AelvmIoK93BolE2JX2yYK1lA5PKZQtcdBods= X-Google-Smtp-Source: AGHT+IFFXUzW/PXAi/sF+7aaq6lUaFYcUV7YW/MQrCOgfEn9qAauNV8DpVYWlT7DWjVM1fpKaopkMA== X-Received: by 2002:a17:902:ecc8:b0:1fb:6ea1:6e with SMTP id d9443c01a7336-1fb6ea1039dmr85708215ad.9.1720421793886; Sun, 07 Jul 2024 23:56:33 -0700 (PDT) Received: from localhost ([157.82.204.135]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-1fb67ee6f31sm34281675ad.292.2024.07.07.23.56.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 07 Jul 2024 23:56:33 -0700 (PDT) From: Akihiko Odaki Date: Mon, 08 Jul 2024 15:55:18 +0900 Subject: [PATCH v3 7/9] memory: Clarify owner must not call memory_region_ref() MIME-Version: 1.0 Message-Id: <20240708-san-v3-7-b03f671c40c6@daynix.com> References: <20240708-san-v3-0-b03f671c40c6@daynix.com> In-Reply-To: <20240708-san-v3-0-b03f671c40c6@daynix.com> To: Eduardo Habkost , Marcel Apfelbaum , =?utf-8?q?Philippe_Mathieu-?= =?utf-8?q?Daud=C3=A9?= , Yanan Wang , John Snow , BALATON Zoltan , Jiaxun Yang , Nicholas Piggin , Daniel Henrique Barboza , David Gibson , Harsh Prateek Bora , Alexey Kardashevskiy , "Michael S. Tsirkin" , =?utf-8?q?Alex_Benn=C3=A9e?= , Peter Xu , Fabiano Rosas , Paolo Bonzini , David Hildenbrand , Thomas Huth , Laurent Vivier Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, qemu-ppc@nongnu.org, Akihiko Odaki X-Mailer: b4 0.14-dev-fd6e3 Received-SPF: none client-ip=2607:f8b0:4864:20::635; envelope-from=akihiko.odaki@daynix.com; helo=mail-pl1-x635.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Akihiko Odaki --- include/exec/memory.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index 847c84c86db0..32bb430acdc4 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -1246,6 +1246,7 @@ void memory_region_init(MemoryRegion *mr, * memory_region_ref: Add a reference to a memory region * * This function adds a reference to the owner if present. + * The owner must not call this function as it results in a circular reference. * See docs/devel/memory.rst to know about owner. * * @mr: the #MemoryRegion