From nobody Sun Feb 8 07:56:16 2026 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C5AC613D636 for ; Tue, 4 Jun 2024 01:55:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717466143; cv=none; b=gaU6+G74LlQ85zUiYx4nooX/otiEKeySrTa/WZQIGGO89+97YtruM6MyV2+K3ljW4bYCTqqCAOX7JJlm2pVuJX73ydvLV4L0FvvrfMxogsK54HimfHUndTvKw5T7L3qigxQciEGHBp2Wrx9lHhKT/QFIMtgd4DKd3rvlzdNoMKA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717466143; c=relaxed/simple; bh=w7xpZF6zFqfkcvZbi2eydbd2CTcSjXyT/TTFm+mMIv4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=qxIRwYkRMZMe1k/yKJeFYakjH8C76MFPgVUYYLo0Ju5Kevga2vh7hVzxl/kpzMDDOKhLKfxOk6mNJOKulg/9vl6KR0ugr85R+yicvv3CgvZRfxtjWmDA0ag/h5/ar/I9oJO/REqOUoy/4/CfYdJOZg7eE1eKpaYYtuXw8oFR4Cc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=A44Ut/5v; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="A44Ut/5v" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1717466142; x=1749002142; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=w7xpZF6zFqfkcvZbi2eydbd2CTcSjXyT/TTFm+mMIv4=; b=A44Ut/5v5EJQIzV5A+gAJUJuApNZT2i7q1HcSEPGdJaWOFj0nVRxRiAM NQ1yzjoHEjs4GDDOHIRxaJdiOKZou6ZzYKPmipVeh09lSGdDu5qm+mJCH Qeg0INszW3vuJv0sqQFBUhFL672+nK/dvWK0LW+Ifvxd+IisSs+rvouGN vm0srd/YIQnN6g2JceWnn+UPnON01l6xKB/tq5/sfr6IZqI6+4sRY35Hs gxHj3nXNs8YiJ2Z9fRxp0sKhBtq4RKS8fQunWjPO0TfH7+yPtQkjv0IUq MtaxPvgKwAwu55iSh4o49FitjdmGfnTBNwa7qPruEDXrMzxqlA2gUqDo9 Q==; X-CSE-ConnectionGUID: VLlXfY9URiucivWWtApBqw== X-CSE-MsgGUID: eGIgvggKSFSn2TDNJSJa2Q== X-IronPort-AV: E=McAfee;i="6600,9927,11092"; a="25385261" X-IronPort-AV: E=Sophos;i="6.08,212,1712646000"; d="scan'208";a="25385261" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Jun 2024 18:55:40 -0700 X-CSE-ConnectionGUID: UYTWYDDfT0qdTFCeWKMbag== X-CSE-MsgGUID: slPdM7OrRP2pa5uJS4C6wA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,212,1712646000"; d="scan'208";a="37662057" Received: from unknown (HELO allen-box.sh.intel.com) ([10.239.159.127]) by orviesa008.jf.intel.com with ESMTP; 03 Jun 2024 18:55:36 -0700 From: Lu Baolu To: Joerg Roedel , Will Deacon , Robin Murphy , Jason Gunthorpe , Kevin Tian Cc: Yi Liu , David Airlie , Daniel Vetter , Kalle Valo , Bjorn Andersson , Mathieu Poirier , Alex Williamson , mst@redhat.com, Jason Wang , Thierry Reding , Jonathan Hunter , Mikko Perttunen , iommu@lists.linux.dev, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Lu Baolu Subject: [PATCH v2 21/22] iommu: Remove iommu_present() Date: Tue, 4 Jun 2024 09:51:33 +0800 Message-Id: <20240604015134.164206-22-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240604015134.164206-1-baolu.lu@linux.intel.com> References: <20240604015134.164206-1-baolu.lu@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The iommu_present() interface is no longer used in the tree anymore. Remove it to avoid dead code. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 6 ------ drivers/iommu/iommu.c | 25 ------------------------- 2 files changed, 31 deletions(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 16401de7802d..b0bd16a7768e 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -776,7 +776,6 @@ static inline void iommu_iotlb_gather_init(struct iommu= _iotlb_gather *gather) } =20 extern int bus_iommu_probe(const struct bus_type *bus); -extern bool iommu_present(const struct bus_type *bus); extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap); extern bool iommu_group_has_isolated_msi(struct iommu_group *group); extern struct iommu_domain *iommu_domain_alloc(const struct bus_type *bus); @@ -1073,11 +1072,6 @@ struct iommu_iotlb_gather {}; struct iommu_dirty_bitmap {}; struct iommu_dirty_ops {}; =20 -static inline bool iommu_present(const struct bus_type *bus) -{ - return false; -} - static inline bool device_iommu_capable(struct device *dev, enum iommu_cap= cap) { return false; diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 7df4a021b040..3e4195c28e85 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1846,31 +1846,6 @@ int bus_iommu_probe(const struct bus_type *bus) return 0; } =20 -/** - * iommu_present() - make platform-specific assumptions about an IOMMU - * @bus: bus to check - * - * Do not use this function. You want device_iommu_mapped() instead. - * - * Return: true if some IOMMU is present and aware of devices on the given= bus; - * in general it may not be the only IOMMU, and it may not have anything t= o do - * with whatever device you are ultimately interested in. - */ -bool iommu_present(const struct bus_type *bus) -{ - bool ret =3D false; - - for (int i =3D 0; i < ARRAY_SIZE(iommu_buses); i++) { - if (iommu_buses[i] =3D=3D bus) { - spin_lock(&iommu_device_lock); - ret =3D !list_empty(&iommu_device_list); - spin_unlock(&iommu_device_lock); - } - } - return ret; -} -EXPORT_SYMBOL_GPL(iommu_present); - /** * device_iommu_capable() - check for a general IOMMU capability * @dev: device to which the capability would be relevant, if available --=20 2.34.1