From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f72.google.com (mail-pj1-f72.google.com [209.85.216.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 853364718D9 for ; Thu, 10 Sep 2026 21:39:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789076358; cv=none; b=r0RKE28hwQG/sHPBmHGWQPiSwLEVfU7mZR+q5KWEWRphBU1Py0u9dfk0f3nyG/b0zc/oVsZ/s5BQmYzh/YdvuQOYpz3e8p0luAwjN+mL8RDQQYJcaajAC+AvNZaFXfELeRQq3aRpKJtwAhZ5+ePj/NNN0w1WI5Re0zvefY1HRT4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789076358; c=relaxed/simple; bh=VZ7i9g/d+H47coYO3Xc9M1wiqaAKR5dvjmJyK4FiQPk=; h=Date:Mime-Version:Message-ID:Subject:From:To:Content-Type; b=Mc4fseOFrFJqosE4V0wOdHdfFfSILrm0ZKl2LjyluADaDonAeCXKNrh2GapXeq7OvmAdF0JGiRDx7Q0VIZgdg11yM/QvqvwA+Hz99TNkqiqVf8yzAxvIAy4OV70IGocJMu/QUotxFivaRQN4/2XExyBhGly/SNcYzCYTFjAKOJk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=psf1nRm8; arc=none smtp.client-ip=209.85.216.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="psf1nRm8" Received: by mail-pj1-f72.google.com with SMTP id 98e67ed59e1d1-38f97b3f853so327924a91.3 for ; Thu, 10 Sep 2026 14:39:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1789076355; x=1789681155; darn=vger.kernel.org; h=content-type:to:from:subject:message-id:mime-version:date:from:to :cc:subject:date:message-id:reply-to:content-type; bh=6fbf9eOsE32d1ZOxCGBZBdmKD77pEwD9k19mpGO+TR8=; b=psf1nRm8pyZ5OcEswNdDl0zaYmyEuhYApnmTgbLffPHub5TfTThZtLyvuUMbDc9zIk FAIkxnHKlYQLbdGs/BXNcqHoFEVScS9yR3RMzEOPoRizKNHogmGoMlwNph6h8N+r6BS2 3UxXIddPQPrwadzGSTHcR3jwTlbH7sXcka+pr9lOq/sn5hI4sDP6ffVLs7fjZF1KT9jV 5kOXasWCt11pEOPr2uuX5DUwRl5Pli4v2VSsBuPYhikNafzeTV0iGbxjxmhLeXyAcSzT tmjEewAe+MYR7MOhZnrJ6Pg2Bb/T69PEFH+07Ccx2M5v0otGVlPMdqXyv+GPRatjmnRs VWeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789076355; x=1789681155; h=content-type:to:from:subject:message-id:mime-version:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=6fbf9eOsE32d1ZOxCGBZBdmKD77pEwD9k19mpGO+TR8=; b=eYChllsjf2Fu7RG+SPQTpLyGc9vt1V8kz+R18+/dDdd4GYAJG61vOJh7G+ZSF1L5pV ao1IM9lXkIgy7NZSXlxnPEBCZWMfk9bMh6TXhoNkVUFTPTuX7LyVRroHrCaAQ77lY6FS zOAOK2emsdyr0MRKaMIkx/9b0jy7rSnLy3v/PpNoIqPJl8ATJL+/XoGJQlNfeJ4089Qz WVtss/uI9ha4XW/gbPpnOtjVjyNlnI0D4Qw/X+wVjLrDuz2Ix7FdkMzH16im+PJrCwqT 5Bz5tRVM+flFjoKQ5e4CxO+1z8a+Xo64lyMktil1m/bxxuVDuz2urAUAO9l38XsHUDaD SeSg== X-Forwarded-Encrypted: i=1; AKwUvBwU8ohp9Syzr6tNh1ExAQo4m7IGIYul68dHCmqrS0mh0ktRSnSCYQogSHqI8tmK4glkEpAQZoquGPy/n2mhNhv3@vger.kernel.org X-Gm-Message-State: AFuF++kNFIISPbgQ8vzxryIY+8u4rc5G8sDinKoT4wvFAzXae13m7RPa MOEShpwh4VDElVwfl2/lX2BKmLwasyBao1bKZZ/t4JtjdPIFU+qUWm7AsxQ5KdhTdq9jMplXc4X CwRniM8KniQ== X-Received: from dlbbq8.prod.google.com ([2002:a05:7022:6708:b0:143:65eb:f1ec]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:1c8b:b0:398:9c00:29ee with SMTP id 98e67ed59e1d1-39d9c38fa48mr1037351a91.22.1789076355117; Thu, 10 Sep 2026 14:39:15 -0700 (PDT) Date: Thu, 10 Sep 2026 14:39:07 -0700 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.55.0.1007.g17ff1f9808-goog Message-ID: <20260910213907.3206529-1-irogers@google.com> Subject: [PATCH v1] tools build: Fix timerfd feature detection with clang From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , llvm@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Clang's uninitialized-const-pointer warning causes a feature test to fail when building perf with clang. This disables support for 'perf kvm stat live'. Add default initialization to new_value as a workaround. test-timerfd.c:15:30: error: variable 'new_value' is uninitialized when passed as a const pointer argument here [-Werror,-Wuninitialized-const-pointer] 15 | if (timerfd_settime(fd, 0, &new_value, NULL) != 0) | ^~~~~~~~~ 1 error generated. Signed-off-by: Ian Rogers --- tools/build/feature/test-timerfd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/build/feature/test-timerfd.c b/tools/build/feature/test-timerfd.c index 9c72c697a9df..f88e8cc63ef3 100644 --- a/tools/build/feature/test-timerfd.c +++ b/tools/build/feature/test-timerfd.c @@ -6,7 +6,7 @@ int main(void) { - struct itimerspec new_value; + struct itimerspec new_value = {}; int fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK); if (fd < 0) -- 2.55.0.1007.g17ff1f9808-goog