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;
From:   Christophe Leroy <christophe.leroy@csgroup.eu>
To:     Jim Quinlan <james.quinlan@broadcom.com>,
        Christoph Hellwig <hch@lst.de>,
        "bcm-kernel-feedback-list@broadcom.com" 
        <bcm-kernel-feedback-list@broadcom.com>,
        "jim2101024@gmail.com" <jim2101024@gmail.com>
CC:     Russell King <linux@armlinux.org.uk>,
        Arnd Bergmann <arnd@arndb.de>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
        Linus Walleij <linus.walleij@linaro.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Sebastian Reichel <sebastian.reichel@collabora.com>,
        "Mike Rapoport (IBM)" <rppt@kernel.org>,
        Eric DeVolder <eric.devolder@oracle.com>,
        Nathan Chancellor <nathan@kernel.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "moderated list:ARM PORT" <linux-arm-kernel@lists.infradead.org>,
        open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 1/1] ARM: Select DMA_DIRECT_REMAP to fix restricted DMA
Thread-Topic: [PATCH v1 1/1] ARM: Select DMA_DIRECT_REMAP to fix restricted
 DMA
Thread-Index: AQHZ8KIwkC6gffJFVEWantWEKIz6ZrAwbyqA
Date:   Thu, 28 Sep 2023 16:24:16 +0000
Message-ID: <f63dc670-1fed-26e0-ea60-aa19e6c87843@csgroup.eu>
References: <20230926175208.9298-1-james.quinlan@broadcom.com>
 <20230926175208.9298-2-james.quinlan@broadcom.com>
In-Reply-To: <20230926175208.9298-2-james.quinlan@broadcom.com>
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?MExWb2FXUE1EbXpKQldYRDIwS3NLR0MzYnVkcmFaZXlrUkFHZEZTcFhxdkVB?=
 =?utf-8?B?OWNOeUVPWmVTbGVGcHhpYzArUVIzd2dFSmhpTCtoMjFzS3BNcHF4dElQSlNq?=
 =?utf-8?B?UmUreGZERHMvLzNxNTVGMlN6Wk41bDVkRWtyZkYzdjRkVjRuUldMSDJFMGRL?=
 =?utf-8?B?cDhHcitmQzVlT0xSMGN4MkdtQWdVYktnczJpWlZjTTlpdUdNVVpaTzRsUUtV?=
 =?utf-8?B?SFVSeTBESVhUZHV5SGxnMUFHancrV0tZdXdVbWJGLzNHVG1iUmxVbnB4Ym1u?=
 =?utf-8?B?R2huSlBlY1AzU2REOHhaL0c3dkYvdFF1V1IxVnJPdEc2OVhWYzlpd0U5Zmpy?=
 =?utf-8?B?QjhuZUw5Ungxb21zREV2RHFONnhaVlN1bDEwVTNlaUlxd2V2dFVXQWIwbWdH?=
 =?utf-8?B?cEgyY2w4VWVyRzd3VjZSczFETlFFdFNiRGY1OXdOM1lHR0J0bHRMM2lIREFz?=
 =?utf-8?B?Qnc0ZmVqMzA1MUY1eDhPSFZwS0hpbm1OSVNubkpPeUZkWlBkV3VFNS9mZTlu?=
 =?utf-8?B?QTR3TURCYWtlaUJuMExnSFlMZGlYY0dyL3hYQkFEQ05PK1QwSHlGeHpybmZ0?=
 =?utf-8?B?NUptREltWlVhVUFwa1ZyaUJycDU2QUxjMlVIV1lDMVFJSmNYN1hDK2hYSldQ?=
 =?utf-8?B?NHlXd0tYN0pPd0JWQ3QxRG1Mc1lNak1GaTlEVEZkSDBNN2JJaVNySXZFdUZK?=
 =?utf-8?B?aE9UbkEybmQzOGNJQXhjbkJpTWIzMlRmU2xqT0pWbUJzT0k3ZnpjZTBtNnFY?=
 =?utf-8?B?dDNIcjNmMGNTUzlsLzBidm95ZGZoMVUyTFAwM25CK3RYT0czS0pkN01iWmNE?=
 =?utf-8?B?NFpzQ2NiRVE5M2RUTXVkRWhySU9tQWNjb29aeWpTMFBBd1BINFpjazNLRUMy?=
 =?utf-8?B?SmIySmdVQ2psb2haS3BncVJ6amFwcFFXR2xxN0dKMjNmVElOK25SVlhveHFh?=
 =?utf-8?B?M3RFeHIvZVk1MHVpS2M3OGkxMFdVVWNlY2YvY3hrNy81OGlwanlvbExYZUhq?=
 =?utf-8?B?U0o3RkFpaG1uN2Y1QjI1QmpGRDFQOUNhdy9HL01XMHg5OW5rV0lMSkdVMTUz?=
 =?utf-8?B?MWd4RWpuQWNidDhaZVl5empuNlBNOFlnS0pqM2R4SC8zVzBNQXg2elQ3UFVN?=
 =?utf-8?B?SmM1M3V2dUIzaDVlQzZOZkJJV0xVcHJKeVNUL0p1OGo3bXNqUUhiaEF4YnBp?=
 =?utf-8?B?dGk5N1RNdklVRkloak1XdGRoaDR5dHl6UjNqdFVYcTdtaVBEU2w3Y0VKRDVM?=
 =?utf-8?B?andML0ZYdXNKN1cwRmpNcnVvWGtzdmUwS05saHFVWW51bklON0UyZFpnUDFa?=
 =?utf-8?B?YUlTT0JOejV0YkorSDYzVWsyUnJPVVF1bUdsSENZVHRZeTByR0Rzb2t0bFl6?=
 =?utf-8?B?ZlNXcEZxT0EzdEhOU3p2UFZEUWZ1VXFkUEhzRlFhUmZlOFZJOWNOcVV6UzZp?=
 =?utf-8?B?QUNMQ3hjNE9MRUxjb3B2SW1kT1pCSDB4Vk41ZEJUdVd3dFZoYUNzZks1TVJa?=
 =?utf-8?B?Vk45aTc1QmxUNmJQZmxPeWY2a0g4K2tqZVBKaTliWGRwbXdxem5wbEd4bkkr?=
 =?utf-8?B?OHNKS1Y2RC9Lc0FXWFpoeE41M0xiUkhOZFNMNXJFUlVqUENPSXNkbWhZQ3Rz?=
 =?utf-8?B?OFdmY2RhWXRwaU0rWCtPaXNpWkU0RHU0MjBlRlo4a2EvWkg5T2NCVzVkaVdi?=
 =?utf-8?B?K3VGZmtCcHlJcGFBbDQ1VGF6SGRCZ0RiS0FPaGx1SWJtZk9YZ3NBU0xUaEpY?=
 =?utf-8?B?STBHZktiOUlhNUFrempGdDY1MHh4U1YvdXRXOElYcWJKTGJHTXZYdndvejYx?=
 =?utf-8?B?cUVvYTVWT2k4TG5EWU1EMWFCTkpGKzNOd1FxRVlqUWZ4MGdKeTM4bVMvdmVP?=
 =?utf-8?B?VnpHS2JtbjBsemkwTXVMQjJvdFBUOGpJS1l2Y3ZiQlZUQ1d0RDZpbnI4VjVB?=
 =?utf-8?B?NEVTdExjcjhVZ3lEOUFHOXVSYUZnakIyWWxGSVZSbHoxVGI1TjZIeEZXa3Y1?=
 =?utf-8?B?U3RiZU9nSlFYM2l0U0JWNkkxeGdKaFBqNFpoaGw2d1hKdzUxczdSUGhjNkpo?=
 =?utf-8?B?cmJ3RHdCTGZjajhYeDdVSU9CaEVoalFDQ1UzMmM2TldWQzN3YWRsS0hhOGEv?=
 =?utf-8?B?SXRZRytRZkNIa2Q2bzRTYVB1SVFGVG1HSGZXM2t1czU0QjkwdW9YMGlMcnMw?=
 =?utf-8?B?MlE9PQ==?=
Content-Type: text/plain; charset="utf-8"
Content-ID: <D2519EE056E5934788EAECE3CAC4289E@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: 0cbfe922-7f32-41d0-384f-08dbc03f5c1c
X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Sep 2023 16:24:16.3433
 (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: mYP5E6d9lW6eGkOQYVK0sIJQQStbpGGZZ8zNf6Nt8cSoj+prE1YlaBfWNTuIfSCB7i99xOLgJZSAOdIcXufmef2hTjaVWCN9sweqi1G4V3U=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MRZP264MB1607
X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,
        RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,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: <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 (snail.vger.email [0.0.0.0]); Thu, 28 Sep 2023 09:24:32 -0700 (PDT)
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