From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793188890; b=SDQv6cskBml8yVMRNzMFYAD+Zqd3gT8mfxggoVxgfdINho54/1vWfiwXwmA5EA5vOSkI 2WjhxLNgSy4qxOlcpdNeFO3On2YKGZq3BXvO/AOYmytzUy6/aktXULAk2Ckt0i8Vwes2O xdEmWVhFfEt7YXyXraRm1pUhjwfaK4QtQTTPDhjYdqibzP+R8ys63nRLC5UK25mNrnmjp 0U/XHA7SSLz7vi0Aa9+eV2WVVo5GjYQZ5RGtZe6cmUEuHlrEjLHnDPlA1KB5mtThkwNB9 xOVREh75gI+NK/esHQzjvQysCPEzp5Z298cuiBpFMNcOGFkBQxhjCvD6Mse0AFEY2JQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793188890; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=uxccL6q+3ml/NhUFxZF9z4TZe/C5k0ibIGYFrtRTsV4=; b=NOmd/sXJdE7S2M6ikhuHC7msHrgKUIif9wrJ9JSuYoyy7PhIWAHo9kTdKaG0PBFl3KZX JXibxXKEZq2NXTfY8l59uiFqULyBAWQDNqoGFgyozB3R8f+9JoKCWKuiZNHcWKFDpkjgt 7sSHgnUftWbdsP6Q17Yo2K/T/vQkpAGTYjr0+H0BzgWbl9IlBhY9bhA5QeAbIMwIvrJxk H9+vHIzwmwHfvmqq2jsijpt6m44ZxkiDUzlkjgSaCM9kkeVHJ34yIWjDDGMuIHzehNNfS lbCRuYDSsvBas8aRBGte9yGQX/lVF1Wv7IZCpxfw1EjO1/L4cO6xNS4t5N+Vxl5f1JA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=by9OLef7; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0D61760A262E; Wed, 28 Oct 2026 12:01:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=by9OLef7 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CB001F031E5; Wed, 28 Oct 2026 12:01:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793188889; bh=uxccL6q+3ml/NhUFxZF9z4TZe/C5k0ibIGYFrtRTsV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=by9OLef7Wg1yLp9jCTCiVqjBlH7DKHghM3k8z5arZN5D0H8yz0vdhtTPQmM6b/2GN AUUrmzJQlR1pZdzapg52OyMsEXs+xNHFPWXDd7Fz1GBrpch8wUv7QTzZ/daE/rgoC0 Yv8zY0qcDdlJv7xU+joniVr9WbcbKr0iTF8enh1Djiveoup4Ky+3BltKn9dGFAnSL1 8p6j/cmP89bJgrsB8znrNxXgQzGHCIs2koKd0YLm0ThfLDfJ29NknQKQzMA1UA6/FG ooeGGpXk/07JHGvDnoavZkD6NIoh7pr4jhsW6HVxeP4E3toa3x3Jn/T+UL4p2zs8rh 2l4D/G813QzHw== From: Sasha Levin To: linux-kernel@vger.kernel.org Cc: Chuck Wolber , Julian Braha , linux-kbuild@vger.kernel.org, Marco Elver , Masami Hiramatsu , Nathan Chancellor , Nicolas Schier , Peter Zijlstra , Thomas Gleixner Subject: [RFC PATCH 18/20] kconfig: add CC_HAS_CONDITION_COVERAGE for MC/DC support detection Date: Wed, 28 Oct 2026 07:59:42 -0400 Message-ID: <20261028120034.871983-19-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261028120034.871983-1-sashal@kernel.org> References: <20261028120034.871983-1-sashal@kernel.org> X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a Kconfig symbol to detect compiler support for -fcondition-coverage, which enables MC/DC (Modified Condition/Decision Coverage) instrumentation. This flag is available since GCC 14. Signed-off-by: Sasha Levin --- scripts/Kconfig.toolchain | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scripts/Kconfig.toolchain b/scripts/Kconfig.toolchain index 4b962831d62af..f66b6efacee6c 100644 --- a/scripts/Kconfig.toolchain +++ b/scripts/Kconfig.toolchain @@ -144,6 +144,9 @@ config CC_HAS_ASSUME config CC_HAS_NO_PROFILE_FN_ATTR def_bool $(success,echo '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror) +config CC_HAS_CONDITION_COVERAGE + def_bool $(cc-option,-fcondition-coverage) + config CC_OPT_ZERO_INIT_PADDING_BITS def_string "$(cc-option-str,-fzero-init-padding-bits=all)" -- 2.53.0