From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E54DC3A5A2 for ; Sun, 22 Sep 2019 19:19:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6274B206C2 for ; Sun, 22 Sep 2019 19:19:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569179957; bh=jeAwG5DvojQw9dZVWLINsbGV4NvCVcWHrUWxlGkkLUs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=b63CAOc+HWLaI7ffpvIcHfof91I03LYXQzHEJuzfR5ECkP12T1S0y/nDSi4s+YQrh MYAJ3UzXVsAxxEZVqrUPZsFiL6BLMOonirfPXkg41TiX/cvXQfw7skGEZT/abR/Gib t0rNTWURVmlNz1JQ4FL23Tie0aN0v6KdcbkX/f5c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437381AbfIVTTQ (ORCPT ); Sun, 22 Sep 2019 15:19:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:55784 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408054AbfIVSy6 (ORCPT ); Sun, 22 Sep 2019 14:54:58 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 96B1E21D6C; Sun, 22 Sep 2019 18:54:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178497; bh=jeAwG5DvojQw9dZVWLINsbGV4NvCVcWHrUWxlGkkLUs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TSzNmNEDTkzebcD4GgYQUGaHE1YxP7WS2XRDAy24sHtzr8LjchcWOMFvftTA6QAuA u2+/pQI38kPL32/gmgmjUQEV5OxatbAVPenAlCRxiIbgIi+mEwFwl5cHlPGOvojczi uZazXPH0C1cdbNKBxCNmbSRoAQ/LJShjoKLMtJK0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Qian Cai , Will Deacon , Sasha Levin Subject: [PATCH AUTOSEL 4.19 030/128] arm64/prefetch: fix a -Wtype-limits warning Date: Sun, 22 Sep 2019 14:52:40 -0400 Message-Id: <20190922185418.2158-30-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922185418.2158-1-sashal@kernel.org> References: <20190922185418.2158-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Qian Cai [ Upstream commit b99286b088ea843b935dcfb29f187697359fe5cd ] The commit d5370f754875 ("arm64: prefetch: add alternative pattern for CPUs without a prefetcher") introduced MIDR_IS_CPU_MODEL_RANGE() to be used in has_no_hw_prefetch() with rv_min=0 which generates a compilation warning from GCC, In file included from ./arch/arm64/include/asm/cache.h:8, from ./include/linux/cache.h:6, from ./include/linux/printk.h:9, from ./include/linux/kernel.h:15, from ./include/linux/cpumask.h:10, from arch/arm64/kernel/cpufeature.c:11: arch/arm64/kernel/cpufeature.c: In function 'has_no_hw_prefetch': ./arch/arm64/include/asm/cputype.h:59:26: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] _model == (model) && rv >= (rv_min) && rv <= (rv_max); \ ^~ arch/arm64/kernel/cpufeature.c:889:9: note: in expansion of macro 'MIDR_IS_CPU_MODEL_RANGE' return MIDR_IS_CPU_MODEL_RANGE(midr, MIDR_THUNDERX, ^~~~~~~~~~~~~~~~~~~~~~~ Fix it by converting MIDR_IS_CPU_MODEL_RANGE to a static inline function. Signed-off-by: Qian Cai Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/include/asm/cputype.h | 21 +++++++++++---------- arch/arm64/kernel/cpufeature.c | 2 +- 2 files changed, 12 insertions(+), 11 deletions(-) diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index b4a48419769f2..9b7d5abd04afd 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -62,14 +62,6 @@ #define MIDR_CPU_MODEL_MASK (MIDR_IMPLEMENTOR_MASK | MIDR_PARTNUM_MASK | \ MIDR_ARCHITECTURE_MASK) -#define MIDR_IS_CPU_MODEL_RANGE(midr, model, rv_min, rv_max) \ -({ \ - u32 _model = (midr) & MIDR_CPU_MODEL_MASK; \ - u32 rv = (midr) & (MIDR_REVISION_MASK | MIDR_VARIANT_MASK); \ - \ - _model == (model) && rv >= (rv_min) && rv <= (rv_max); \ - }) - #define ARM_CPU_IMP_ARM 0x41 #define ARM_CPU_IMP_APM 0x50 #define ARM_CPU_IMP_CAVIUM 0x43 @@ -153,10 +145,19 @@ struct midr_range { #define MIDR_ALL_VERSIONS(m) MIDR_RANGE(m, 0, 0, 0xf, 0xf) +static inline bool midr_is_cpu_model_range(u32 midr, u32 model, u32 rv_min, + u32 rv_max) +{ + u32 _model = midr & MIDR_CPU_MODEL_MASK; + u32 rv = midr & (MIDR_REVISION_MASK | MIDR_VARIANT_MASK); + + return _model == model && rv >= rv_min && rv <= rv_max; +} + static inline bool is_midr_in_range(u32 midr, struct midr_range const *range) { - return MIDR_IS_CPU_MODEL_RANGE(midr, range->model, - range->rv_min, range->rv_max); + return midr_is_cpu_model_range(midr, range->model, + range->rv_min, range->rv_max); } static inline bool diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 94babc3d0ec2c..069545cb922ce 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -846,7 +846,7 @@ static bool has_no_hw_prefetch(const struct arm64_cpu_capabilities *entry, int _ u32 midr = read_cpuid_id(); /* Cavium ThunderX pass 1.x and 2.x */ - return MIDR_IS_CPU_MODEL_RANGE(midr, MIDR_THUNDERX, + return midr_is_cpu_model_range(midr, MIDR_THUNDERX, MIDR_CPU_VAR_REV(0, 0), MIDR_CPU_VAR_REV(1, MIDR_REVISION_MASK)); } -- 2.20.1