From patchwork Tue Nov 26 17:21:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Uros Bizjak X-Patchwork-Id: 13886264 Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) (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 6609A1DD894; Tue, 26 Nov 2024 17:23:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732641839; cv=none; b=itKSidX8luTIg9N6j+muFV+b0uBHY6jQq4w2o9BBCorOxrVGMu3hB4nKX2whErDrRR6i8ox+NunZzebVimhXQgTd+V0iNz9J3bAQnoa34kmKfXyrgBiSr68vvqkLar4ORQk3AOL8AQr3EJ0aVjAU7HCutJF6LP7nbngaYDb8GAs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732641839; c=relaxed/simple; bh=VvmlP5AH+fUUSyvPi8wqWT4LAcAAvQBDSvVszq80Jb4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uFpt1ZD+zRBbHm56iKPBI6RZb+Q1JKhIENYOiitJYO/uO4TFV6ei54wvV5GPm5o5TOQ8nujWH9UZlvOVWamtvoXhnE613KSzVETyZ8H9KlGt9eICPC0C4HmV9tMsA5pYRfnE3nWWeX4nONDeHI9jM5YB1X+mmvFEayU0GMW3U9o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=PasuyTDP; arc=none smtp.client-ip=209.85.218.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="PasuyTDP" Received: by mail-ej1-f42.google.com with SMTP id a640c23a62f3a-aa549f2f9d2so357243466b.3; Tue, 26 Nov 2024 09:23:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1732641835; x=1733246635; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=scK7sUlNwfpZu+VLLnedXLuF+xaa2OfJ8eCpocRXk/o=; b=PasuyTDPIk+o30QbnbRZ9C/o5ajDIAxXS9t9r6TDH1csdPiywxtBIkL+z2PSImqoqI 0M4E2YVOI/Q345nbId3Q4KXJmLAWaLFvfmdYZlXuIuRi2H1pNIHu6gJfcC9CHxM/jSg0 CS8yjlbQ4KNvLFAEhGIx6uR9xl7X2G/Qekve27tSAmlOmid8E8kJ64RHnXJSGwHTVQlI zxxV+Wl0yfccnYKu6XUtbXfxXw/DVSJBSTKPyPLbi4RIf5Xr2TpckZfwy+kW+XDhGG4p DfLc54eglsxNp2gzdl5MRAW1bDvrSL1eU0dQlsQUaUqzYW0NtyYzinCXtA4X0WnxtLei 9+mw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732641835; x=1733246635; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=scK7sUlNwfpZu+VLLnedXLuF+xaa2OfJ8eCpocRXk/o=; b=sLX+anlf57r8e3f7v9BVC8waDSLChRywlsMR24k+kIbJs14N9RjLFYqXX0DksQnHoT Yab4kEhmTJ7TUt5s7iXnoyIuRGHzJKALOGYVs+4Uc9sDKBNDi6EYPyKPiRRtZ6hqxcr2 zpbSW1Zn0iDRIqqDT1eAWEn9omszb8uvSIZZduSScHRHc/hYxdQVcMeKzT/UYgLEIs3n 0nV/EldJPsaC+WSTku/6SAq8kM0uUJGFBvpKHRcBuFO2FzQ9LxzSd82psQ6TjYJkmpDV e549UtdWdw+GZT946AiScAg4m9+I05qbteUqIpJJGnfHOToVL6gHp7W+CHR1kR0vQCaC R+5Q== X-Forwarded-Encrypted: i=1; AJvYcCU06t6cUSSKuC6YxloIGulxr+g3Uk8In5d64H0VmhsnhxHMYtVnQA9CyCMoFqN2kDKPgidD7O+n@vger.kernel.org, AJvYcCU43YYm0UelqpVDDl2rFLCctfllCWEL6W3QmCB3ral+COdqSPMEEzCVCA5XHFBp2Sp7xB83Th4qBNOiBgOh@vger.kernel.org, AJvYcCVkwuOFHtBem1gKZ50dXyYnFk+VREDaYlRqfDolg7KalSm9aGYhq88stifNr7ofdPw2Qorf18gaE3QH@vger.kernel.org, AJvYcCWXwwEDwrxnxWhvyY1X05QcjFTGP2dQrmBlmPBIwCxoP36yaIvgZH8XEkR5o8LNyhc157HPmEZn31z+poV7@vger.kernel.org, AJvYcCWYJX0XCOuLAlf1yXOCpJcDVdDcKjEIUsLKhhSXeZHsDoKG/KVSgHepKm3mjL8HPKP1CwkPx+eV2DGEo0hD6uA=@vger.kernel.org X-Gm-Message-State: AOJu0YyFe/DPxLZsOcibMlS+NS2//0DTiOCDdm1mDXRBmJ8DPltrXdpB 90gzp39lj9ZZJOKoOVvhhK5mQoTjgIqIfa48pqdJWcx37E+gu8+EYzBtHp3H7yk= X-Gm-Gg: ASbGnctzco8PwIGw85XzpKKPy4lCzmRXBkH6bp4miLAm5kgSgMlE1GSrLZa8EXhGJ0f AbHeHh6YUMxzjdvURQYW66rAUPxeA8v63tE+c7/A8YGdD/0rZ8k+JM/mDf3dFLAMEp+QZfgoq+G GFuSmwFBkJIgz+2CX6lwEGqapB3bxyxHtwiiF/Bavd+7ZVfsAUdqVqiaDT1wOlNQhsb1BN80HST /wSax31qh6OSUYh4iZPgesZMKOKcGrtbJmIJnkKbhAi7qib1cQ5s2Qxs8c= X-Google-Smtp-Source: AGHT+IFUI0YUp1+RBJSqcGYBOc1FhgIJEm5xni8unk9E56g4XY//7qbTg95Zcg5DcOFquH1FM+TtEQ== X-Received: by 2002:a17:906:1daa:b0:aa5:3748:2ee3 with SMTP id a640c23a62f3a-aa537483463mr1076090466b.50.1732641835429; Tue, 26 Nov 2024 09:23:55 -0800 (PST) Received: from localhost.localdomain ([46.248.82.114]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aa534232086sm473832866b.42.2024.11.26.09.23.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Nov 2024 09:23:55 -0800 (PST) From: Uros Bizjak To: x86@kernel.org, linux-sparse@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-bcachefs@vger.kernel.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org Cc: Uros Bizjak , Luc Van Oostenryck , Thomas Gleixner , Dennis Zhou , Tejun Heo , Christoph Lameter , Linus Torvalds , Andy Lutomirski , Ingo Molnar , Nadav Amit , Brian Gerst , Denys Vlasenko , "H. Peter Anvin" Subject: [PATCH 2/6] compiler.h: Introduce TYPEOF_UNQUAL() macro Date: Tue, 26 Nov 2024 18:21:19 +0100 Message-ID: <20241126172332.112212-3-ubizjak@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20241126172332.112212-1-ubizjak@gmail.com> References: <20241126172332.112212-1-ubizjak@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Define TYPEOF_UNQUAL() to use __typeof_unqual__() as typeof operator when available, to return unqualified type of the expression. Current version of sparse doesn't know anything about __typeof_unqual__() operator. Avoid the usage of __typeof_unqual__() when sparse checking is active to prevent sparse errors with unknowing keyword. Signed-off-by: Uros Bizjak Cc: Luc Van Oostenryck Cc: Thomas Gleixner Cc: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: Linus Torvalds Cc: Andy Lutomirski Cc: Ingo Molnar Cc: Nadav Amit Cc: Brian Gerst Cc: Denys Vlasenko Cc: "H. Peter Anvin" Cc: Peter Zijlstra #endif /* __LINUX_COMPILER_H */ diff --git a/init/Kconfig b/init/Kconfig index a20e6efd3f0f..c1f9eb3d5f2e 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -894,6 +894,9 @@ config ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH config CC_HAS_INT128 def_bool !$(cc-option,$(m64-flag) -D__SIZEOF_INT128__=0) && 64BIT +config CC_HAS_TYPEOF_UNQUAL + def_bool $(success,echo 'int foo (int a) { __typeof_unqual__(a) b = a; return b; }' | $(CC) -x c - -S -o /dev/null) + config CC_IMPLICIT_FALLTHROUGH string default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)