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[2620:137:e000::1:20]) by mx.google.com with ESMTP id e14-20020a056a0000ce00b00627e9b0d5d7si3252225pfj.354.2023.04.17.04.01.12; Mon, 17 Apr 2023 04:01:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=GuEnpVc1; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229804AbjDQKsl (ORCPT + 99 others); Mon, 17 Apr 2023 06:48:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48476 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229892AbjDQKsh (ORCPT ); Mon, 17 Apr 2023 06:48:37 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E978173B; Mon, 17 Apr 2023 03:47:45 -0700 (PDT) Date: Mon, 17 Apr 2023 10:46:01 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1681728363; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cFRW2SVBpn4JPRQad5zXICoDbiGeWJ9NlLHtm2Zg4EU=; b=GuEnpVc1UNz4NN69Dm2X2JzRgxb77q3owdlonRIDRAQm+WZW66+413mi0sLv8P5AintSNQ BX4Cvr5UqI4ibmpZ/rAsIEcCp5wJpuRJg8F4dDLV80G3aRZhRIDuB5mxk8BrsED7L0YHvg HvhlTkWwaBe9U96sVW8cpTmddtEIMUYDTFOxSswSSb4VIO3oVR51iVHkWckllJ4hF2nU+s KDRBN0bP55auDSxL9Nibx+uHalul1bhJ4QCgGoYXH9Su/6u+ABt0KvpBJyLdU8DZf8c72b S7i1JXShW23YvtgauGkXIzdNiKpSQGI+wAuwJcaMF0S3i+aMf9HqSQ0B2Ft8/Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1681728363; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cFRW2SVBpn4JPRQad5zXICoDbiGeWJ9NlLHtm2Zg4EU=; b=t73RahbkYxp/3nI0JDNWadBnrAA9xLPIYwkG/rT4jTnth4StyePALj+nFWWY4mWPLVdsva kprswnaT/Y0iGCCw== From: "tip-bot2 for Mark Rutland" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: locking/core] locking/atomic: Correct (cmp)xhcg instrumentation Cc: Mark Rutland , "Peter Zijlstra (Intel)" , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230413160644.490976-1-mark.rutland@arm.com> References: <20230413160644.490976-1-mark.rutland@arm.com> MIME-Version: 1.0 Message-ID: <168172836181.404.9626666760344612481.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763420969737052905?= X-GMAIL-MSGID: =?utf-8?q?1763420969737052905?= The following commit has been merged into the locking/core branch of tip: Commit-ID: 93eff603d6a2bc1895eeb7063dbd0661bb760b74 Gitweb: https://git.kernel.org/tip/93eff603d6a2bc1895eeb7063dbd0661bb760b74 Author: Mark Rutland AuthorDate: Thu, 13 Apr 2023 17:06:44 +01:00 Committer: Peter Zijlstra CommitterDate: Fri, 14 Apr 2023 16:08:24 +02:00 locking/atomic: Correct (cmp)xhcg instrumentation All xchg() and cmpxchg() ops are atomic RMWs, but currently we instrument these with instrument_atomic_write() rather than instrument_atomic_read_write(), missing the read aspect. Similarly, all try_cmpxchg() ops are non-atomic RMWs on *oldp, but we instrument these accesses with instrument_atomic_write() rather than instrument_read_write(), missing the read aspect and erroneously marking these as atomic. Fix the instrumentation for both points. Signed-off-by: Mark Rutland Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20230413160644.490976-1-mark.rutland@arm.com --- include/linux/atomic/atomic-instrumented.h | 76 ++++++++++----------- scripts/atomic/gen-atomic-instrumented.sh | 6 +- 2 files changed, 41 insertions(+), 41 deletions(-) diff --git a/include/linux/atomic/atomic-instrumented.h b/include/linux/atomic/atomic-instrumented.h index 245ba66..03a232a 100644 --- a/include/linux/atomic/atomic-instrumented.h +++ b/include/linux/atomic/atomic-instrumented.h @@ -1948,14 +1948,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_xchg(__ai_ptr, __VA_ARGS__); \ }) #define xchg_acquire(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_xchg_acquire(__ai_ptr, __VA_ARGS__); \ }) @@ -1963,14 +1963,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_release(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_xchg_release(__ai_ptr, __VA_ARGS__); \ }) #define xchg_relaxed(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_xchg_relaxed(__ai_ptr, __VA_ARGS__); \ }) @@ -1978,14 +1978,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg(__ai_ptr, __VA_ARGS__); \ }) #define cmpxchg_acquire(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg_acquire(__ai_ptr, __VA_ARGS__); \ }) @@ -1993,14 +1993,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_release(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg_release(__ai_ptr, __VA_ARGS__); \ }) #define cmpxchg_relaxed(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg_relaxed(__ai_ptr, __VA_ARGS__); \ }) @@ -2008,14 +2008,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg64(__ai_ptr, __VA_ARGS__); \ }) #define cmpxchg64_acquire(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg64_acquire(__ai_ptr, __VA_ARGS__); \ }) @@ -2023,14 +2023,14 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_release(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg64_release(__ai_ptr, __VA_ARGS__); \ }) #define cmpxchg64_relaxed(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg64_relaxed(__ai_ptr, __VA_ARGS__); \ }) @@ -2039,8 +2039,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2048,8 +2048,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2058,8 +2058,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ kcsan_release(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2067,8 +2067,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg_relaxed(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2077,8 +2077,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg64(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2086,8 +2086,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg64_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2096,8 +2096,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ kcsan_release(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg64_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2105,22 +2105,22 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg64_relaxed(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) #define cmpxchg_local(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg_local(__ai_ptr, __VA_ARGS__); \ }) #define cmpxchg64_local(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_cmpxchg64_local(__ai_ptr, __VA_ARGS__); \ }) @@ -2128,7 +2128,7 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ arch_sync_cmpxchg(__ai_ptr, __VA_ARGS__); \ }) @@ -2136,8 +2136,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2145,8 +2145,8 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ typeof(oldp) __ai_oldp = (oldp); \ - instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \ - instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \ + instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \ + instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \ arch_try_cmpxchg64_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \ }) @@ -2154,7 +2154,7 @@ atomic_long_dec_if_positive(atomic_long_t *v) ({ \ typeof(ptr) __ai_ptr = (ptr); \ kcsan_mb(); \ - instrument_atomic_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ arch_cmpxchg_double(__ai_ptr, __VA_ARGS__); \ }) @@ -2162,9 +2162,9 @@ atomic_long_dec_if_positive(atomic_long_t *v) #define cmpxchg_double_local(ptr, ...) \ ({ \ typeof(ptr) __ai_ptr = (ptr); \ - instrument_atomic_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ + instrument_atomic_read_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \ arch_cmpxchg_double_local(__ai_ptr, __VA_ARGS__); \ }) #endif /* _LINUX_ATOMIC_INSTRUMENTED_H */ -// 97fe4d79aa058d2164df824632cbc4f716d2a407 +// 6b513a42e1a1b5962532a019b7fc91eaa044ad5e diff --git a/scripts/atomic/gen-atomic-instrumented.sh b/scripts/atomic/gen-atomic-instrumented.sh index c8165e9..d9ffd74 100755 --- a/scripts/atomic/gen-atomic-instrumented.sh +++ b/scripts/atomic/gen-atomic-instrumented.sh @@ -104,8 +104,8 @@ cat <