Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2;
From:   Christophe Leroy <christophe.leroy@csgroup.eu>
To:     "paulmck@kernel.org" <paulmck@kernel.org>,
        "Liam R. Howlett" <Liam.Howlett@oracle.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-renesas-soc@vger.kernel.org" 
        <linux-renesas-soc@vger.kernel.org>,
        Shanker Donthineni <sdonthineni@nvidia.com>
Subject: Re: [PATCH v2 1/2] maple_tree: Disable mas_wr_append() when other
 readers are possible
Thread-Topic: [PATCH v2 1/2] maple_tree: Disable mas_wr_append() when other
 readers are possible
Thread-Index: AQHZ0jZLGonsLT7psk6V57DL3sI7p7ABi0MAgAx8eICAACGXAIAAAcAAgAAJOoCACD39AIAAi4MAgABrJYCAAAgIAA==
Date:   Tue, 12 Sep 2023 15:06:27 +0000
Message-ID: <2a0657bf-2585-4b98-bbdb-dd38502c8555@csgroup.eu>
References: <20230819004356.1454718-1-Liam.Howlett@oracle.com>
 <20230819004356.1454718-2-Liam.Howlett@oracle.com>
 <3f86d58e-7f36-c6b4-c43a-2a7bcffd3bd@linux-m68k.org>
 <20230906152325.dblzauybyoq5kd35@revolver>
 <ad298077-fca8-437e-b9e3-66e31424afb1@paulmck-laptop>
 <20230906172954.oq4vogeuco25zam7@revolver>
 <495849d6-1dc6-4f38-bce7-23c50df3a99f@paulmck-laptop>
 <20230911235452.xhtnt7ply7ayr53x@revolver>
 <33150b55-970c-4607-9015-af0e50e4112d@paulmck-laptop>
 <3e75add4-4d51-eab9-7029-25660e02b082@csgroup.eu>
In-Reply-To: <3e75add4-4d51-eab9-7029-25660e02b082@csgroup.eu>
Accept-Language: fr-FR, en-US
Content-Language: fr-FR
user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.13.0
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?utf-8?B?YjVJeW1XMldIN0JtWTZzdlVHV0lwOXB4aEovaGxRVlZHZDN6bjNrUC9KcEpG?=
 =?utf-8?B?MjArWWR6TlZ1b2Q4YkMybmppTm9ocVVjbEZTS3V2OVhlTERnQ0owRGd0Zlhh?=
 =?utf-8?B?dUgrSVVkbU5aQnVsVURXbUxHMDA2U3VoNnF6V0NpQnpzV1RiY2xXVXRTZ0xz?=
 =?utf-8?B?SEtoMHN5NmlhRjN3SXR6OTNXeFlRNFJWdWNkK2NJdDlWRStJOFphbjZWNG9q?=
 =?utf-8?B?RW5Kb05uSmJuTWE5LysxWEVzQytqYVprZHhNd0p2UUZiS3JaTkx6UDRRdWpo?=
 =?utf-8?B?ZktqN1BxSGNlRnVvK3ZpTUFvRXUzdWhlRmNaVEhwajE0YkRDYkt6MGJRWU1v?=
 =?utf-8?B?WEJUVWFJR28wSStQL2lWVVFFQmJqaks0cXN5TzNnck9Seng4cnlFaDBHSFk3?=
 =?utf-8?B?WXRqTVNrcGpuSDBPUmtJYTJZbjdkdjRpYk5oeWxmcjNCNGhaNXdJMzJkOWtW?=
 =?utf-8?B?OWpNdDhvdDhPT0c3UytaU0pQYmp3NkYyd2Y3RGFEVEpkazRHcGZYeFowV2FD?=
 =?utf-8?B?alNTb0JJaUpiWDkwSmpENG4ra0htR0x4YU5FMWRzN1ArbTJEcUQzYTRhRldj?=
 =?utf-8?B?V0w3K05sZ01tRnJ4dnNaeDRBQ0lpTXR5MFo0eHFZRDRaaXRMR21yOXhWOU9x?=
 =?utf-8?B?d2lEVncwNXNuS29kRFRRVEkydDdObnpyeUVORGd2b3pvclNIMEJpWTlYbmxL?=
 =?utf-8?B?aTJVbmhkWUgxbjZ4dUxOQlY5MVdHWmhybldSTk9pdzhWY2NPQVhyYS9WUVE0?=
 =?utf-8?B?aTNOSmtzckxQNllhaGJFKzVpcTBhcUp6Z0IyOUY5QzZiOVZUdDdERzRKSDNl?=
 =?utf-8?B?bjYzMlFMVlZLZ2o2V3VQR3dadXN3bEIrWGlLRmdmUGpNSFEzWmhramtRU2dS?=
 =?utf-8?B?eVNFbHV2V3czTWIwdi9NTzhKNnlab21MNnNJZ2VSYmQyTlFWbVJTcVQzS3hh?=
 =?utf-8?B?Z1FLd0F0aHpzaXlLRnV5TVBiR1QzN0N4SGRBL0NtWFNQMlZYMXJZd2FCdEdU?=
 =?utf-8?B?NmlxOVlDb1NkSWthTWVRVnhSb0JSa0ZVV0Z5dFNZVE1HUHJVb1pMYmpxdlpR?=
 =?utf-8?B?TU9FQ2N4TUVhN0pYenlJUStObTVVT0gxeTg4QzlhZ3ZMa1Fpc1lTMmZXWlJw?=
 =?utf-8?B?dlJZbmtxVTJTRkNlUTlzNXBUNWRnMkEzNjhaQVBVc01FOGtOcUs1SXljWlJP?=
 =?utf-8?B?RzhrLzJXTWFaazNrOXVpVzY5ZkRpNGZqb0V1VjRNWE5vV0dOWG1SSjExaDVP?=
 =?utf-8?B?VXNGR3drTk5Ma0dIcG13N1ROM0sva1lqQlB0TDRBVXd3bUZ4SXdVQkhXZGRJ?=
 =?utf-8?B?MXZxUHdKdlFmNTZLN2thZnJhRkp1dlcvWk5qYmtGbWtzNUMwV1ptVGt4ZHpR?=
 =?utf-8?B?VUY0SlE3QUQ2cUt6bWJlcWRwZ1FicXg0Sy9McUtYVnppc2crazIrTGFxWjRm?=
 =?utf-8?B?VEtkVXMzVkNRMzFPYWZkbytQQVlJTVVCME9qR0dqMDJQSkNWcVFPejAxTWZL?=
 =?utf-8?B?bmdPRFVyai9NOEhFajNNclowVXQ0VHgyMkg3dHVPMi8yRW9VRk9HS1N3Um0x?=
 =?utf-8?B?VjFiWFJqci9sblZDOUxxbmdDa0V3cDZ1bWRQaC9INndQb2k1QWhZNjhuWUI1?=
 =?utf-8?B?YWdBT1BZZ3N2VC9VbnlkYm9YLy9ydkI5eDRWN2puNTVjaGxNU21xK3FhSVBj?=
 =?utf-8?B?SDlRN2ZjdEdJT3czREczK1c0SU4zT29RMVFDMWUzbFVBb1N4dllyLzBzTkZV?=
 =?utf-8?B?TGMyTVY2MVc3U2ZNZkduWmpBK1NEM3Q4ZVRCU1ErcmhJMkk5Ym5BdnFEVzRN?=
 =?utf-8?B?Q052VVFUZ0hKakdBd1Npc2c0K21HNHp5WFBFMzlTcVV1Y0VHWVlHNCtrbS9u?=
 =?utf-8?B?c2hBQ3Y2cXQ4MEtiUmdRd1VXN29tdzJNYWpnbU5keEZZaXdYZnlpQU1TU1Z4?=
 =?utf-8?B?VFBCQkZtQThUblpTRld3M1h0dFNEMjM3K2NmQ2h5VkxIcVlBdXFFZ1NkQ1NQ?=
 =?utf-8?B?UHBmNWZyMkpCc21aZWFDSFlCaDNDWUsvRDcwZ3JJMTlPb1N4T3pKR2dRb0hn?=
 =?utf-8?B?cE9McUtQWkk1QXIvbGFERSs2VnM0Z0l4c3ZnMHZZRTB1UTRScnJZSS9VTjhi?=
 =?utf-8?B?YzkyWVhrMTJXalY4WDREZjBYeTIxUWk2Q3A4Q2s2RnNDMUtOR2J3Zis1dUxK?=
 =?utf-8?B?a1E9PQ==?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <38A262238E6CEA428AC7AC0C4C0B1D37@FRAP264.PROD.OUTLOOK.COM>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-OriginatorOrg: csgroup.eu
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: MRZP264MB2988.FRAP264.PROD.OUTLOOK.COM
X-MS-Exchange-CrossTenant-Network-Message-Id: ced4c003-0267-4d0b-936c-08dbb3a1d6e9
X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Sep 2023 15:06:27.9705
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 9914def7-b676-4fda-8815-5d49fb3b45c8
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: vnD41KCdyTNAmnDbWw55nANnO5AhYG+o8+vBbo1dCb2dL6MBzRbj/V6DdCONSyyWwFFN1eglRCJd8XW/PFCZAHF+IDQ3v/pQ39J5ontWgGM=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PR1P264MB2231
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Tue, 12 Sep 2023 08:07:05 -0700 (PDT)
X-Spam-Status: No, score=-2.3 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,
	NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS autolearn=unavailable
	autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email
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