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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3A66C433EF for ; Tue, 14 Dec 2021 22:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234832AbhLNWFk (ORCPT ); Tue, 14 Dec 2021 17:05:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237955AbhLNWEs (ORCPT ); Tue, 14 Dec 2021 17:04:48 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9FD8C061756 for ; Tue, 14 Dec 2021 14:04:47 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 3B1C5CE1AF8 for ; Tue, 14 Dec 2021 22:04:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 454C6C34605; Tue, 14 Dec 2021 22:04:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639519482; bh=ZcDcjArNCM1Zq31P0Rm5yiXWDHNC3chp8Nh5IPW4cyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bmrs7gGXfOW0PJsWlZ0QZOq2GWAVmsuv4qXjhxYSOW3L7+SEm4NFUNSYI7YYaL89Z Z9YA/w8Rh9WQLj/3uq82xqCyg44S+GFJN2f7tcCXtf3VQdeWFdN8db9TbEK8U7SXbs ghppcxNuv7iukbsV1VHn2jDFCann+ZXf2MWIW9MuShqoLutNSxTrM4ms08c6wHYVux d1h2FhYWVdyLSfW03ZaywXOc6KZGap2DR8/Ovp5IFxntVnVyYn+Jgjicq/cEV9nOom ORPP8LSMZaCnWxp9dHrW9AI8zFJ2OojLAULoEFCocqjiUGA+bHXWtHlP3ZqN8zk+ok 9DpG6h9sAVfKA== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 9216B5C2C8E; Tue, 14 Dec 2021 14:04:41 -0800 (PST) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, kernel-team@fb.com, mingo@kernel.org Cc: elver@google.com, andreyknvl@google.com, glider@google.com, dvyukov@google.com, cai@lca.pw, boqun.feng@gmail.com, kernel test robot , "Paul E . McKenney" Subject: [PATCH kcsan 29/29] kcsan: Only test clear_bit_unlock_is_negative_byte if arch defines it Date: Tue, 14 Dec 2021 14:04:39 -0800 Message-Id: <20211214220439.2236564-29-paulmck@kernel.org> X-Mailer: git-send-email 2.31.1.189.g2e36527f23 In-Reply-To: <20211214220356.GA2236323@paulmck-ThinkPad-P17-Gen-1> References: <20211214220356.GA2236323@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marco Elver Some architectures do not define clear_bit_unlock_is_negative_byte(). Only test it when it is actually defined (similar to other usage, such as in lib/test_kasan.c). Link: https://lkml.kernel.org/r/202112050757.x67rHnFU-lkp@intel.com Reported-by: kernel test robot Signed-off-by: Marco Elver Signed-off-by: Paul E. McKenney --- kernel/kcsan/kcsan_test.c | 8 +++++--- kernel/kcsan/selftest.c | 8 +++++--- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c index 2bad0820f73ad..a36fca063a73a 100644 --- a/kernel/kcsan/kcsan_test.c +++ b/kernel/kcsan/kcsan_test.c @@ -598,7 +598,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_READ_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_READ_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_READ_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_READ_BARRIER(spin_lock(&test_spinlock), false); @@ -644,7 +643,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_WRITE_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_WRITE_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_WRITE_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_WRITE_BARRIER(spin_lock(&test_spinlock), false); @@ -690,7 +688,6 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_RW_BARRIER(test_and_change_bit(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(__clear_bit_unlock(0, &test_var), true); - KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); KCSAN_EXPECT_RW_BARRIER(arch_spin_lock(&arch_spinlock), false); KCSAN_EXPECT_RW_BARRIER(arch_spin_unlock(&arch_spinlock), true); KCSAN_EXPECT_RW_BARRIER(spin_lock(&test_spinlock), false); @@ -698,6 +695,11 @@ static void test_barrier_nothreads(struct kunit *test) KCSAN_EXPECT_RW_BARRIER(mutex_lock(&test_mutex), false); KCSAN_EXPECT_RW_BARRIER(mutex_unlock(&test_mutex), true); +#ifdef clear_bit_unlock_is_negative_byte + KCSAN_EXPECT_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); + KCSAN_EXPECT_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); + KCSAN_EXPECT_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var), true); +#endif kcsan_nestable_atomic_end(); } diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c index b6d4da07d80a1..75712959c84e0 100644 --- a/kernel/kcsan/selftest.c +++ b/kernel/kcsan/selftest.c @@ -169,7 +169,6 @@ static bool __init test_barrier(void) KCSAN_CHECK_READ_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_READ_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_READ_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_READ_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); @@ -199,7 +198,6 @@ static bool __init test_barrier(void) KCSAN_CHECK_WRITE_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_WRITE_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_WRITE_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); @@ -232,12 +230,16 @@ static bool __init test_barrier(void) KCSAN_CHECK_RW_BARRIER(test_and_change_bit(0, &test_var)); KCSAN_CHECK_RW_BARRIER(clear_bit_unlock(0, &test_var)); KCSAN_CHECK_RW_BARRIER(__clear_bit_unlock(0, &test_var)); - KCSAN_CHECK_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); arch_spin_lock(&arch_spinlock); KCSAN_CHECK_RW_BARRIER(arch_spin_unlock(&arch_spinlock)); spin_lock(&test_spinlock); KCSAN_CHECK_RW_BARRIER(spin_unlock(&test_spinlock)); +#ifdef clear_bit_unlock_is_negative_byte + KCSAN_CHECK_RW_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); + KCSAN_CHECK_READ_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); + KCSAN_CHECK_WRITE_BARRIER(clear_bit_unlock_is_negative_byte(0, &test_var)); +#endif kcsan_nestable_atomic_end(); return ret; -- 2.31.1.189.g2e36527f23