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([49.43.162.199]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7068c719371sm3324620b3a.102.2024.06.25.08.21.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Jun 2024 08:21:51 -0700 (PDT) From: Abhinav Jain To: shuah@kernel.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: skhan@linuxfoundation.org, jain.abhinav177@gmail.com, javier.carrasco.cruz@gmail.com Subject: [PATCH] selftests/proc: fix unused result warning during test compilation Date: Tue, 25 Jun 2024 15:21:39 +0000 Message-Id: <20240625152139.16412-1-jain.abhinav177@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Check the return value from write function to get rid of the warning during test compilation, shared below. Tested by compiling after the change, the warning disappears. proc-empty-vm.c:385:17: warning: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Wunused-result] 385 | write(1, buf, rv); Signed-off-by: Abhinav Jain --- tools/testing/selftests/proc/proc-empty-vm.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c index 56198d4ca2bf..510ab4a5330a 100644 --- a/tools/testing/selftests/proc/proc-empty-vm.c +++ b/tools/testing/selftests/proc/proc-empty-vm.c @@ -382,7 +382,12 @@ static int test_proc_pid_statm(pid_t pid) assert(rv >= 0); assert(rv <= sizeof(buf)); if (0) { - write(1, buf, rv); + ssize_t bytes_written = write(1, buf, rv); + + if (bytes_written != rv) { + perror("write"); + return EXIT_FAILURE; + } } const char *p = buf;