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[2620:137:e000::1:20]) by mx.google.com with ESMTP id e20-20020a656794000000b0047880f866aasi4519302pgr.149.2022.12.02.19.06.48; Fri, 02 Dec 2022 19:07:01 -0800 (PST) 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=@rivosinc-com.20210112.gappssmtp.com header.s=20210112 header.b=izvAm0VD; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231446AbiLCDFo (ORCPT + 99 others); Fri, 2 Dec 2022 22:05:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56860 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230176AbiLCDFn (ORCPT ); Fri, 2 Dec 2022 22:05:43 -0500 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84239F7A09 for ; Fri, 2 Dec 2022 19:05:42 -0800 (PST) Received: by mail-pf1-x436.google.com with SMTP id z14so2665331pfr.11 for ; Fri, 02 Dec 2022 19:05:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20210112.gappssmtp.com; s=20210112; h=to:from:content-transfer-encoding:mime-version:message-id:date :subject:from:to:cc:subject:date:message-id:reply-to; bh=MlD/Jt4lEh7hCsdG4GrZC5S+VkhD7NzUj5refRzoYlM=; b=izvAm0VDDUI8l/g0FySHjcna49MAYiOl2i2nsHUCSKpwH56Ir0FhArtL4lxajgpkXU q1iMarjU2+4l78dL0ag6d1NvQOqww04i5UnypzOB7uiJNMdv6ZNzb7EMxtmw5MZyE7FS bThPfxkT785nXJba2CClXZ8fuV2fw9cigmtlu8HPoTnQiyjsAVLVsY+Z6ZgI5QpnZlNS ohghGfzoUn9u90kZ6rVg/9evUP6bC3tPDT6pLi+TdYbrAm2TFz5GcZZc1u/bdGibPp/B 2n2b2AfXkggu33bWgZZ5liaNgIt/NwMzjqmw4UnUUdoXbVq6av/nJ7otAE/nEGEaYUqj 79LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:content-transfer-encoding:mime-version:message-id:date :subject:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=MlD/Jt4lEh7hCsdG4GrZC5S+VkhD7NzUj5refRzoYlM=; b=NEJaHO30m4VfC4VGujx338Tz1JcDm3708XNTm1BMosEkKHDey1duuh+BtY0EqKT1MZ H3FeZq62NxNEyVUxORrXbgQyQ8jcpZ6Y6YKrcJddl0WEmszlnK0OsQvcIwVk6cdWx7XY KgfZ0WXYAJ9u0unixBtwUmZgxc3QVak2fBxUTNYNIj3JxwiWo06OfrdX7xSPYZNWUFk2 /qty2ktc+1tvS7YL+e465Kk7jjOqO9tZlEx9nFH1ll1Dps0KWDe7srCHKGCBi/r0sYQH +isZH8acrNAkuZjOutZQSwFiw0gAz4WKQdkek5JmQ3WJ1XnV2CKzsjXzIjYKU5Mt5mxp KE2Q== X-Gm-Message-State: ANoB5plkEgAPpKjXhpkWKkD3VvqymJvOMq88FO9Rhk12X9eGcmj1b/cY l1Xu4Zt9z3NXDddO6yX2Wwy/7So7P+Qpa+/2 X-Received: by 2002:a63:d34e:0:b0:477:650a:705c with SMTP id u14-20020a63d34e000000b00477650a705cmr46384100pgi.588.1670036741697; Fri, 02 Dec 2022 19:05:41 -0800 (PST) Received: from localhost ([50.221.140.188]) by smtp.gmail.com with ESMTPSA id q24-20020aa78438000000b00576984617b1sm287450pfn.60.2022.12.02.19.05.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Dec 2022 19:05:41 -0800 (PST) Subject: [PATCH 0/5] mm: Stop alaising VM_FAULT_HINDEX_MASK in arch code Date: Fri, 2 Dec 2022 19:03:51 -0800 Message-Id: <20221203030356.3917-1-palmer@rivosinc.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 From: Palmer Dabbelt To: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS 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?1751160529613718677?= X-GMAIL-MSGID: =?utf-8?q?1751160529613718677?= When reviewing I noticed that the arch-specific VM_FAULT flags used by arm and s390 alias with VM_FAULT_HINDEX_MASK. I'm not sure if it's possible to manifest this as a bug, but it certainly seems fragile. The RISC-V patch is on top of the linked patch above, which isn't in any proper tree yet. Everything else should apply to 6.1-rc1, but I'm in no particular rush to get that cleanup in so rush on my end for 6.2. That said I figured it would be easier to send along this now, just in case someone who knows the MM code better thinks it can manifest as a bug.