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[23.128.96.34]) by mx.google.com with ESMTPS id r2-20020aa78442000000b006cd82b3585esi1177431pfn.287.2023.12.03.11.35.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Dec 2023 11:35:46 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.34 as permitted sender) client-ip=23.128.96.34; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=JAuSRV8U; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.34 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by howler.vger.email (Postfix) with ESMTP id 9605B805FD59; Sun, 3 Dec 2023 11:35:43 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at howler.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234320AbjLCTfU (ORCPT + 99 others); Sun, 3 Dec 2023 14:35:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234033AbjLCTeg (ORCPT ); Sun, 3 Dec 2023 14:34:36 -0500 Received: from mail-yb1-xb32.google.com (mail-yb1-xb32.google.com [IPv6:2607:f8b0:4864:20::b32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B99610FC for ; Sun, 3 Dec 2023 11:34:10 -0800 (PST) Received: by mail-yb1-xb32.google.com with SMTP id 3f1490d57ef6-db5e5647c24so1621144276.1 for ; Sun, 03 Dec 2023 11:34:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1701632049; x=1702236849; 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=+ONlIH00MiYhYGoBsEhokNEtUTm7vUieJjeG6NEodPg=; b=JAuSRV8UL64Bcgb9S2QAMIyfAeGsChnDH0aLot298hiqZoSfpkmaWEXvXal2oZ7qu3 sacUuNDiCdvj55/6RC18Br6ndwKMaHXQ7mcLG1a9exqt/soHyX+qtjLruDPG0EXAMJnz t+369EpIfq2JcG0pkz5HrW3N86Tc+tJjtvLUnjc7Mm+zFdgB92eoYwT7v7Tq/r3849nn I3GlFnakdFHM2IYtVVIGwDszRDmUje8vZ9UBhRcu8smUeZcDtj+9a20crgmZmXhjoZxA vJudBiGK1xUCo0FzIEA0C/UCWvw5CuciKIZ4QS4sYR4tEy1ZTjp2O6ZnuGhnPlhV1im1 xcKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701632049; x=1702236849; 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=+ONlIH00MiYhYGoBsEhokNEtUTm7vUieJjeG6NEodPg=; b=QP+uBFOB3dwNOC3b4uZJAF4nwy51ugjt5RIXwsXapFAtByjXKwJ3cM3BFeC9IwtJGR VSSuRE0lMoHzTLhQyO00Dsfw183lpIiwdX+RpD1CoH+enhDXz/YRn06oZYLy0jRWxMce mwkmHWsuluEeIk8mbLxMmA+TX36FRbRVV6aHmLtWM/EctdM3YxV3bP9w1SSwnp4PrC52 2fbEP+NZS4lqzJisLzI9EZZ4bVH6a3PU5CpHIiWc0qTiRVV739jXmtmIZ5ro5aDMCYQP 93Wr2i9SRzlDkk+aEf8XeSSG2JWF+yymSSpfZJ+fQTzm/asexBS+MjiLMT5/8Mvt9N4+ PH0A== X-Gm-Message-State: AOJu0YzgQ6CM+dlcVsmDdetVyPgVxA1QmboKOTqy9AbyFmQX68VdseCF UDwmeFvvkkeZG9V0Wip2f7L1oJXM3ipaIQ== X-Received: by 2002:a81:a1c7:0:b0:5d7:1940:3efd with SMTP id y190-20020a81a1c7000000b005d719403efdmr1651357ywg.46.1701632048410; Sun, 03 Dec 2023 11:34:08 -0800 (PST) Received: from localhost ([2601:344:8301:57f0:cb98:c3e:57c:8191]) by smtp.gmail.com with ESMTPSA id a85-20020a0dd858000000b005ce039bf1ecsm2099376ywe.7.2023.12.03.11.34.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Dec 2023 11:34:08 -0800 (PST) From: Yury Norov To: linux-kernel@vger.kernel.org, Michal Simek , Yury Norov Cc: Jan Kara , Mirsad Todorovac , Matthew Wilcox , Rasmus Villemoes , Andy Shevchenko , Maxim Kuvyrkov , Alexey Klimov , Bart Van Assche , Sergey Shtylyov Subject: [PATCH v2 34/35] microblaze: rework get_mmu_context() Date: Sun, 3 Dec 2023 11:33:06 -0800 Message-Id: <20231203193307.542794-33-yury.norov@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231203193307.542794-1-yury.norov@gmail.com> References: <20231203192422.539300-1-yury.norov@gmail.com> <20231203193307.542794-1-yury.norov@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on howler.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (howler.vger.email [0.0.0.0]); Sun, 03 Dec 2023 11:35:43 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1784290629072734490 X-GMAIL-MSGID: 1784290629072734490 Fix opencoded find_and_set_bit_wrap(), which also suppresses potential KCSAN warning. Signed-off-by: Yury Norov --- arch/microblaze/include/asm/mmu_context_mm.h | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/microblaze/include/asm/mmu_context_mm.h b/arch/microblaze/include/asm/mmu_context_mm.h index c2c77f708455..209c3a62353a 100644 --- a/arch/microblaze/include/asm/mmu_context_mm.h +++ b/arch/microblaze/include/asm/mmu_context_mm.h @@ -82,12 +82,11 @@ static inline void get_mmu_context(struct mm_struct *mm) return; while (atomic_dec_if_positive(&nr_free_contexts) < 0) steal_context(); - ctx = next_mmu_context; - while (test_and_set_bit(ctx, context_map)) { - ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx); - if (ctx > LAST_CONTEXT) - ctx = 0; - } + + do { + ctx = find_and_set_bit_wrap(context_map, LAST_CONTEXT + 1, next_mmu_context); + } while (ctx > LAST_CONTEXT); + next_mmu_context = (ctx + 1) & LAST_CONTEXT; mm->context = ctx; context_mm[ctx] = mm;