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Wed, 04 Dec 2024 18:53:39 -0800 (PST) Received: from charlie.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-215f8e62c36sm2468565ad.65.2024.12.04.18.53.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Dec 2024 18:53:38 -0800 (PST) From: Charlie Jenkins Date: Wed, 04 Dec 2024 18:53:28 -0800 Subject: [PATCH] riscv: selftests: Fix warnings pointer masking test Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241204-fix_warnings_pointer_masking_tests-v1-1-ea1e9665ce7a@rivosinc.com> X-B4-Tracking: v=1; b=H4sIAKcVUWcC/x2N0QrCMAxFf2Xk2ULXVVF/RaSULa1BzEZSVBj79 4U9ngvnnhUUhVDh3q0g+CWlmQ36UwfjK3NFR5MxBB9iH3x0hf7pl4WJq6ZlJm4o6ZP1bUNqqE3 dcL14jGU4x3ADO1oEzToij+e27SDGsaZ0AAAA To: Shuah Khan , Paul Walmsley , Palmer Dabbelt , Albert Ou , Samuel Holland Cc: linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Palmer Dabbelt , Charlie Jenkins X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2409; i=charlie@rivosinc.com; h=from:subject:message-id; bh=h5pkF7WFsF6QKVOZr0OZCA6MCXRJdUGJ2thXdNkkSus=; b=owGbwMvMwCHWx5hUnlvL8Y3xtFoSQ3qg6MoFCz3CMjK6WW9+Xj7vzKoNdvv6WxY//7S91L3LQ fve+dW6HaUsDGIcDLJiiiw81xqYW+/olx0VLZsAM4eVCWQIAxenAEyk3ozhf7klwyeXpJcfj+S0 X121KjA9Lpf1y9ZW3ZyL5p3/Tj6bas7IcEDHblf3zqw9WfE7GXaWXpL7s/DgNf7JpQ5ejlbvv31 7ywUA X-Developer-Key: i=charlie@rivosinc.com; a=openpgp; fpr=7D834FF11B1D8387E61C776FFB10D1F27D6B1354 When compiling the pointer masking tests with -Wall this warning is present: pointer_masking.c: In function ‘test_tagged_addr_abi_sysctl’: pointer_masking.c:203:9: warning: ignoring return value of ‘pwrite’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 203 | pwrite(fd, &value, 1, 0); | ^~~~~~~~~~~~~~~~~~~~~~~~ pointer_masking.c:208:9: warning: ignoring return value of ‘pwrite’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 208 | pwrite(fd, &value, 1, 0); I came across this on riscv64-linux-gnu-gcc (Ubuntu 11.4.0-1ubuntu1~22.04). Fix this by checking that the number of bytes written equal the expected number of bytes written. Fixes: 7470b5afd150 ("riscv: selftests: Add a pointer masking test") Signed-off-by: Charlie Jenkins --- tools/testing/selftests/riscv/abi/pointer_masking.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) --- base-commit: 40384c840ea1944d7c5a392e8975ed088ecf0b37 change-id: 20241204-fix_warnings_pointer_masking_tests-3860e4f35429 diff --git a/tools/testing/selftests/riscv/abi/pointer_masking.c b/tools/testing/selftests/riscv/abi/pointer_masking.c index dee41b7ee3e3..5ae941e9ac73 100644 --- a/tools/testing/selftests/riscv/abi/pointer_masking.c +++ b/tools/testing/selftests/riscv/abi/pointer_masking.c @@ -189,6 +189,7 @@ static void test_tagged_addr_abi_sysctl(void) { char value; int fd; + int ret; ksft_print_msg("Testing tagged address ABI sysctl\n"); @@ -200,14 +201,24 @@ static void test_tagged_addr_abi_sysctl(void) } value = '1'; - pwrite(fd, &value, 1, 0); + ret = pwrite(fd, &value, 1, 0); + if (ret != 1) { + ksft_test_result_fail("Write to /proc/sys/abi/tagged_addr_disabled failed.\n"); + return; + } + ksft_test_result(set_tagged_addr_ctrl(min_pmlen, true) == -EINVAL, "sysctl disabled\n"); value = '0'; - pwrite(fd, &value, 1, 0); - ksft_test_result(set_tagged_addr_ctrl(min_pmlen, true) == 0, - "sysctl enabled\n"); + ret = pwrite(fd, &value, 1, 0); + if (ret != 2) { + ksft_test_result_fail("Write to /proc/sys/abi/tagged_addr_disabled failed.\n"); + return; + } + + ksft_test_result(set_tagged_addr_ctrl(min_pmlen, true) == -EINVAL, + "sysctl disabled\n"); set_tagged_addr_ctrl(0, false);