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Mon, 29 Sep 2025 04:54:56 -0700 (PDT) Received: from y740.local ([2401:4900:1f30:25ff:36cb:10ee:ba03:839f]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3341be384c5sm16983570a91.26.2025.09.29.04.54.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Sep 2025 04:54:56 -0700 (PDT) From: Sidharth Seela To: nphamcs@gmail.com, hannes@cmpxchg.org, nathan@kernel.org, shuah@kernel.org, morbo@google.com, justinstitt@google.com, nick.desaulniers+lkml@gmail.com Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, david.hunter.linux@gmail.com, Sidharth Seela Subject: [PATCH v1] selftests: cachestat: Fix warning on declaration under label Date: Mon, 29 Sep 2025 17:24:06 +0530 Message-ID: <20250929115405.25695-2-sidharthseela@gmail.com> X-Mailer: git-send-email 2.47.3 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" Fix warning caused from declaration under a case label. The proper way is to declare variable at the beginning of the function. The warning came from running clang using LLVM=3D1; and is as follows: -- -test_cachestat.c:260:3: warning: label followed by a declaration is a C23 = extension [-Wc23-extensions] 260 | char *map =3D mmap(NULL, filesize, PROT_READ | PROT= _WRITE, | Signed-off-by: Sidharth Seela Reviewed-by: Dev Jain Reviewed-by: SeongJae Park Reviewed-by: wang lian --- diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/tes= ting/selftests/cachestat/test_cachestat.c index c952640f163b..0305e736f2b8 100644 --- a/tools/testing/selftests/cachestat/test_cachestat.c +++ b/tools/testing/selftests/cachestat/test_cachestat.c @@ -226,7 +226,7 @@ bool run_cachestat_test(enum file_type type) int syscall_ret; size_t compute_len =3D PS * 512; struct cachestat_range cs_range =3D { PS, compute_len }; - char *filename =3D "tmpshmcstat"; + char *filename =3D "tmpshmcstat", *map; struct cachestat cs; bool ret =3D true; int fd; @@ -257,7 +257,7 @@ bool run_cachestat_test(enum file_type type) } break; case FILE_MMAP: - char *map =3D mmap(NULL, filesize, PROT_READ | PROT_WRITE, + map =3D mmap(NULL, filesize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); =20 if (map =3D=3D MAP_FAILED) { --=20 2.47.3