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AJvYcCWUAXlG5PV/3LHElY4LtO21ZTmH9KiUN57vwsGkmnlhLThVFz0tDP5WDObpxZEHGLx1WQ2FSadtOPEPU1U=@vger.kernel.org X-Gm-Message-State: AOJu0YzyLx21okZY8BCVBErwy5YrNbFaVQns4vsVuvUoEY7GTUvxCSGj hKZgtqiGVF0jh80mrNKu7RwTwTGp8zHucRvqnofOwRxRCRj2bh4FdTb3exsXRAtfK7EWFaoN/RL D4COECg== X-Google-Smtp-Source: AGHT+IEC0XntAVPhP46YCuSQR8aucy2yFpAV1NdYsaqT4OqN5P4FGt9h/5E8WgDvwC6hNZc/JS/GJoayAtne X-Received: from plgl19.prod.google.com ([2002:a17:902:f693:b0:226:3efa:da86]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:2308:b0:223:5ca8:5ecb with SMTP id d9443c01a7336-2292f9f2b5cmr222952555ad.42.1743531963640; Tue, 01 Apr 2025 11:26:03 -0700 (PDT) Date: Tue, 1 Apr 2025 11:23:41 -0700 In-Reply-To: <20250401182347.3422199-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250401182347.3422199-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.504.g3bcea36a83-goog Message-ID: <20250401182347.3422199-44-irogers@google.com> Subject: [PATCH v1 43/48] perf daemon: Silence -Wshorten-64-to-32 warnings From: Ian Rogers To: Yury Norov , Rasmus Villemoes , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , Thomas Gleixner , Darren Hart , Davidlohr Bueso , "=?UTF-8?q?Andr=C3=A9=20Almeida?=" , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , Yicong Yang , Jonathan Cameron , Nathan Chancellor , Bill Wendling , Justin Stitt , Josh Poimboeuf , Al Viro , Kyle Meyer , Ben Gainey , Athira Rajeev , Kajol Jain , Aditya Gupta , Eder Zulian , Dapeng Mi , Kuan-Wei Chiu , He Zhe , Dirk Gouders , Brian Geffon , Ravi Bangoria , Howard Chu , Charlie Jenkins , Colin Ian King , Dominique Martinet , Jann Horn , Masahiro Yamada , Arnd Bergmann , Yang Jihong , Dmitry Vyukov , Andi Kleen , Graham Woodward , Ilkka Koskinen , Anshuman Khandual , Zhongqiu Han , Hao Ge , Tengda Wu , Gabriele Monaco , Chun-Tse Shao , Casey Chen , "Dr. David Alan Gilbert" , Li Huafei , "Steinar H. Gunderson" , Levi Yun , Weilin Wang , Thomas Falcon , Thomas Richter , Andrew Kreimer , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , Christophe Leroy , Jean-Philippe Romain , Junhao He , "Masami Hiramatsu (Google)" , Xu Yang , Steve Clevenger , Zixian Cai , Stephen Brennan , Yujie Liu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The clang warning -Wshorten-64-to-32 can be useful to catch inadvertent truncation. In some instances this truncation can lead to changing the sign of a result, for example, truncation to return an int to fit a sort routine. Silence the warning by making the implicit truncation explicit. Signed-off-by: Ian Rogers --- tools/perf/builtin-daemon.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c index f0568431fbd5..640ba8191083 100644 --- a/tools/perf/builtin-daemon.c +++ b/tools/perf/builtin-daemon.c @@ -514,7 +514,8 @@ static int daemon_session__control(struct daemon_sessio= n *session, struct pollfd pollfd =3D { .events =3D POLLIN, }; char control_path[PATH_MAX]; char ack_path[PATH_MAX]; - int control, ack =3D -1, len; + int control, ack =3D -1; + size_t len; char buf[20]; int ret =3D -1; ssize_t err; @@ -543,7 +544,7 @@ static int daemon_session__control(struct daemon_sessio= n *session, len =3D strlen(msg); =20 err =3D writen(control, msg, len); - if (err !=3D len) { + if (err !=3D (ssize_t)len) { pr_err("failed: write to control pipe: %d (%s)\n", errno, control_path); goto out; --=20 2.49.0.504.g3bcea36a83-goog