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([2405:201:6803:30b3:43ae:d83d:a773:c8db]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-710e5a8b508sm1314532b3a.177.2024.08.10.06.53.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Aug 2024 06:53:40 -0700 (PDT) From: Abhinav Jain To: shuah@kernel.org, brauner@kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: skhan@linuxfoundation.org, javier.carrasco.cruz@gmail.com, Abhinav Jain Subject: [PATCH] selftests: filesystems: fix warn_unused_result build warnings Date: Sat, 10 Aug 2024 19:23:33 +0530 Message-Id: <20240810135333.672845-1-jain.abhinav177@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Add return value checks for read & write calls in test_listmount_ns function. This patch resolves below compilation warnings: ``` statmount_test_ns.c: In function =E2=80=98test_listmount_ns=E2=80=99: statmount_test_ns.c:322:17: warning: ignoring return value of =E2=80=98writ= e=E2=80=99 declared with attribute =E2=80=98warn_unused_result=E2=80=99 [-Wunused-resu= lt] statmount_test_ns.c:323:17: warning: ignoring return value of =E2=80=98read= =E2=80=99 declared with attribute =E2=80=98warn_unused_result=E2=80=99 [-Wunused-resu= lt] ``` Signed-off-by: Abhinav Jain --- .../selftests/filesystems/statmount/statmount_test_ns.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test_n= s.c b/tools/testing/selftests/filesystems/statmount/statmount_test_ns.c index e044f5fc57fd..70cb0c8b21cf 100644 --- a/tools/testing/selftests/filesystems/statmount/statmount_test_ns.c +++ b/tools/testing/selftests/filesystems/statmount/statmount_test_ns.c @@ -319,8 +319,11 @@ static void test_listmount_ns(void) * Tell our parent how many mounts we have, and then wait for it * to tell us we're done. */ - write(child_ready_pipe[1], &nr_mounts, sizeof(nr_mounts)); - read(parent_ready_pipe[0], &cval, sizeof(cval)); + if (write(child_ready_pipe[1], &nr_mounts, sizeof(nr_mounts)) !=3D + sizeof(nr_mounts)) + ret =3D NSID_ERROR; + if (read(parent_ready_pipe[0], &cval, sizeof(cval)) !=3D sizeof(cval)) + ret =3D NSID_ERROR; exit(NSID_PASS); } =20 --=20 2.34.1