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[23.128.96.37]) by mx.google.com with ESMTPS id e12-20020a65688c000000b005af44ed3148si4407101pgt.367.2023.11.18.07.55.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Nov 2023 07:55:29 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=X7pc2AVj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 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 snail.vger.email (Postfix) with ESMTP id 42A66803E7AA; Sat, 18 Nov 2023 07:55:28 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231356AbjKRPzQ (ORCPT + 29 others); Sat, 18 Nov 2023 10:55:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230518AbjKRPxl (ORCPT ); Sat, 18 Nov 2023 10:53:41 -0500 Received: from mail-yw1-x112d.google.com (mail-yw1-x112d.google.com [IPv6:2607:f8b0:4864:20::112d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E867B2107 for ; Sat, 18 Nov 2023 07:51:58 -0800 (PST) Received: by mail-yw1-x112d.google.com with SMTP id 00721157ae682-5b383b4184fso33543527b3.1 for ; Sat, 18 Nov 2023 07:51:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700322717; x=1700927517; 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=+JD5ffTGpk93tg8AkoESy4I0f3LaG6FeAVUaBjQtKP0=; b=X7pc2AVj+gHCUODSfMJQ1CCULuF++OsKUTMOHebHVYuvR+MvRn6nhotkGpU/kxXh/2 aZJ3Xya7gtFHfEbh4wBKK0E/UATRnEdwk80UWlQdUgJazARP+qCKUetQ5aLNkNquEdcU 0+XCzfzH74i9o5L9kDnBssrtP3Z3QSykWlwJv0oi9MEexSkaGku06cELfiogK2kISFeB DuU23LUY58LkVlgdEc4+13umvrYG9zK7eaxlAvKs39+PjzuGM0qRPU5HZ7r14rXMnNac jZx9whY3yYAx9Ru1flPMZll5kbS4rTK5kiGUHblS+MtLtbMveV4r67k+cMg8tSvbGln7 Yz0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700322717; x=1700927517; 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=+JD5ffTGpk93tg8AkoESy4I0f3LaG6FeAVUaBjQtKP0=; b=WST0Rg6KKynh3QjteS6LJaCH11OKgfkcb125CGWp061Y4E2TV+j6oB79BVeX3Ddhe/ x+1uiKYQ2cRnCV5tmoELwONiJIU2WANGAMS4xkIghywK50SiwB4bS1gITbwtj3m1a439 yccK5hAcnpfiuwmGdi4G/MqWIiLNTobxGMS3fOdchG2tHLG1I4CV7pwAaXJd4kbhbb48 HQNUYPsJHFX0V4lmps1hEvxKX/mRFMZhzgU0W6yrq55jIWdWNZ5Fahy7TUg8kgCl59co MKNOo7q8an0yMA6Z51Dn7asgJpkfF2VJKz6I+WFT0pEv+6Ijhe8b84azH8xQJfCCzum5 1SQg== X-Gm-Message-State: AOJu0YwvB03sE9aRrwBoasc808s53Yf/KPxM0quuxhEdVP4LIfARlAxW JC0u/SJ+2zerM/83M2RxaT206N4UTO6an+TO X-Received: by 2002:a81:4f13:0:b0:5a5:65e:b847 with SMTP id d19-20020a814f13000000b005a5065eb847mr2911182ywb.34.1700322717124; Sat, 18 Nov 2023 07:51:57 -0800 (PST) Received: from localhost ([2601:344:8301:57f0:48a9:bd4c:868d:dc97]) by smtp.gmail.com with ESMTPSA id w184-20020a0dd4c1000000b0059f650f46b2sm1172057ywd.7.2023.11.18.07.51.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Nov 2023 07:51:56 -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 Subject: [PATCH 33/34] microblaze: rework get_mmu_context() Date: Sat, 18 Nov 2023 07:51:04 -0800 Message-Id: <20231118155105.25678-34-yury.norov@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231118155105.25678-1-yury.norov@gmail.com> References: <20231118155105.25678-1-yury.norov@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,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-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Sat, 18 Nov 2023 07:55:28 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1782917815264370564 X-GMAIL-MSGID: 1782917815264370564 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;