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Mon, 15 Jun 2026 12:45:35 -0700 From: Nicolin Chen To: Will Deacon CC: Robin Murphy , , Jason Gunthorpe , Shuai Xue , , , Subject: [PATCH] iommu/arm-smmu-v3: Declare eats_s1chk and eats_trans as host-endian u64 Date: Mon, 15 Jun 2026 12:45:33 -0700 Message-ID: <20260615194533.3290010-1-nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF00003441:EE_|SA3PR12MB8439:EE_ X-MS-Office365-Filtering-Correlation-Id: 5630b9a8-e62b-4e6f-aad5-08decb16b834 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700016|82310400026|376014|23010399003|18002099003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(1800799024)(36860700016)(82310400026)(376014)(23010399003)(18002099003)(11063799006)(56012099006);DIR:OUT;SFP:1101; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org arm_smmu_get_ste_update_safe() declares the eats_s1chk and eats_trans locals as __le64, but initializes them from FIELD_PREP(), which returns a host-endian value, and passes them through cpu_to_le64() at the use sites. Sparse reports the following warnings: >> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:1122:38: sparse: sparse: cast from restricted __le64 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:1124:33: sparse: sparse: cast from restricted __le64 Declare both locals as u64 so the type matches FIELD_PREP() and the existing cpu_to_le64() at the use sites performs the host-to-little-endian conversion. No functional change. Fixes: 7cad80048595 ("iommu/arm-smmu-v3: Mark EATS_TRANS safe when computing the update sequence") Reported-by: kernel test robot Closes: https://lore.kernel.org/all/202606151017.QU0evpH9-lkp@intel.com/ Assisted-by: Claude:claude-opus-4-8 Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 8ce3e801eda3b..4c0f7b17b1f37 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -1240,9 +1240,9 @@ VISIBLE_IF_KUNIT void arm_smmu_get_ste_update_safe(const __le64 *cur, const __le64 *target, __le64 *safe_bits) { - const __le64 eats_s1chk = + const u64 eats_s1chk = FIELD_PREP(STRTAB_STE_1_EATS, STRTAB_STE_1_EATS_S1CHK); - const __le64 eats_trans = + const u64 eats_trans = FIELD_PREP(STRTAB_STE_1_EATS, STRTAB_STE_1_EATS_TRANS); /* -- 2.43.0