From nobody Mon Mar 2 11:01:42 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1772230914; cv=none; d=zohomail.com; s=zohoarc; b=hYmfmFXk+9cwJjWZDZFfsN26U0A8fCtEw/jpvmfdPErCnavKBigVAtPS+Bcz1RtmBIW5rzW/s6sWEw8KEjd8oV+mpE2K1+MT0wmtdSOy75kllCTupYg0Tw5G6ssfoTsTfbg6RyPKxy+jVDqboGsTU5HVgHDLBIAcmoxzghp4lnw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1772230914; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=fEylY4HeRrQg4z7pkuEupgOpmZpN1pRXlYvFVufBQPI=; b=mRF3/QZ0v0T1sylpW8T2DlW+fWWszRkP+DqHUDysY2q+J1ndTjZZtqWLqtwHfe0eG99TgE2Z4/tk4fX04UZy1bE0HsKJbIJcOmXpGOB4I+lSHyQF3aFe59ntGA4Lk8fTEIKRLDt2Xxijx8JR1fwlCYb98IQrdGhXsd6Zcs9E8Sc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=@intel.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1772230914942255.64390585377475; Fri, 27 Feb 2026 14:21:54 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vw6Be-000651-3Q; Fri, 27 Feb 2026 17:19:54 -0500 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 1vw6Bc-000644-I3 for qemu-devel@nongnu.org; Fri, 27 Feb 2026 17:19:52 -0500 Received: from mgamail.intel.com ([198.175.65.16]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vw6Bb-0007m5-2a for qemu-devel@nongnu.org; Fri, 27 Feb 2026 17:19:52 -0500 Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2026 14:19:40 -0800 Received: from vkasired-desk2.fm.intel.com ([10.105.128.132]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Feb 2026 14:19:40 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1772230791; x=1803766791; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8DjDopZg0XVik4k1ICxjRmt2mb1IxbLdY763BFKsh0Y=; b=GFOvOX5t9ILhFmSCCEpAXG/UlE9zzX8xeW4mgtnXA+nhxii7bYV7pNVH 35ee4BN51NI7/vPEkpex1RIHYl9wfBwnFhhhuaX2D1NFLMirq/uw1vXJA U8eY7TI0Bbf9wib5e152Tzdcb8BTDGoWERRhAVnra2iYYSQmxG5E5OCoz Q2Z2ig4XEx9o4JQ+jRBLXmFFfjBe2i/E+ej3gq6QeE5BllarKyl6EelFB k4pfRykyZoGNTKvuvsBdR5Y2sV2i3m9mHkjl7uHRWEMlqaM8wo+Bf4+hC JxpwVEShv/Us3T1QNKRRK23J23bZBOS4gbxroPfwulbrvkjEaxqdAt78j w==; X-CSE-ConnectionGUID: xEZF07GpQaC6k20A+/lX5g== X-CSE-MsgGUID: WXjyDTtJSyaxz0Otfetrbw== X-IronPort-AV: E=McAfee;i="6800,10657,11714"; a="73509344" X-IronPort-AV: E=Sophos;i="6.21,314,1763452800"; d="scan'208";a="73509344" X-CSE-ConnectionGUID: okJsn4+YToqCAgw12g/62A== X-CSE-MsgGUID: wpJ4YRuUSy+JL801cgQEbA== X-ExtLoop1: 1 From: Vivek Kasireddy To: qemu-devel@nongnu.org Cc: Vivek Kasireddy , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Akihiko Odaki , Dmitry Osipenko , Alex Williamson , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PATCH v8 04/10] virtio-gpu-dmabuf: Remove rcu_read_lock/unlock from virtio_gpu_create_udmabuf() Date: Fri, 27 Feb 2026 14:13:50 -0800 Message-ID: <20260227221632.827046-5-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260227221632.827046-1-vivek.kasireddy@intel.com> References: <20260227221632.827046-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.16; envelope-from=vivek.kasireddy@intel.com; helo=mgamail.intel.com X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.706, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.401, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1772230916527158500 There is no need to wrap the call to qemu_ram_block_from_host() with rcu_read_lock/unlock as we already hold a reference to the memory region that owns the ram block. Note that, the reference was obtained via dma_memory_map() while creating the mapping. Cc: Marc-Andr=C3=A9 Lureau Cc: Alex Benn=C3=A9e Cc: Akihiko Odaki Cc: Dmitry Osipenko Cc: Alex Williamson Cc: C=C3=A9dric Le Goater Reviewed-by: Akihiko Odaki Signed-off-by: Vivek Kasireddy --- hw/display/virtio-gpu-dmabuf.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/hw/display/virtio-gpu-dmabuf.c b/hw/display/virtio-gpu-dmabuf.c index c34d4c85bc..0782bcf3a1 100644 --- a/hw/display/virtio-gpu-dmabuf.c +++ b/hw/display/virtio-gpu-dmabuf.c @@ -43,10 +43,7 @@ static void virtio_gpu_create_udmabuf(struct virtio_gpu_= simple_resource *res) sizeof(struct udmabuf_create_item) * res->iov_cnt); =20 for (i =3D 0; i < res->iov_cnt; i++) { - rcu_read_lock(); rb =3D qemu_ram_block_from_host(res->iov[i].iov_base, false, &offs= et); - rcu_read_unlock(); - if (!rb || rb->fd < 0) { g_free(list); return; --=20 2.53.0