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=?us-ascii?Q?/VGVR8Fi9d8ilSt3+NRDMvZPb+/Q80Sba0/2yltN+CyGuRuFrLXgorUeylL5?= =?us-ascii?Q?inp4SpzareL0yWAXk8+cJmQl3+mlmdwonvIrdjvwETA8g03STu56HYi8evIl?= =?us-ascii?Q?bIeJxIFZHgK2mhB0s9ODjjXjRL16xkVEIwLYyNl3Wp3+8Bwq04zv268s/bh8?= =?us-ascii?Q?bXK4WDR7N9kheCSJ4W/KZlx4?= x-ms-exchange-transport-forked: True Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: synopsys.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BY5PR12MB4131.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f89ae65-3a3c-43ba-713f-08d908aa1f36 X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Apr 2021 11:55:00.9485 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: c33c9f88-1eb7-4099-9700-16013fd9e8aa X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: zLLTFj380K+O8mIwkbEn0XIEhAoGWwCk7n2D6LQyjIiuUkJHc+t+lwDQMx74T5Ot5jQeF3IPmsHsG/yDR2M39Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4292 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mike, On Mon, April 26, 2021 2:29 PM, Mike Rapoport wrote: > On Mon, Apr 26, 2021 at 01:10:04PM +0300, Vladimir Isaev wrote: > > - max_zone_pfn[ZONE_HIGHMEM] =3D min_low_pfn; > > + max_zone_pfn[ZONE_HIGHMEM] =3D max_high_pfn; >=20 > This is correct with PAE40, but it will break !PAE40 when "highmem" has l= ower > addresses than lowmem. >=20 > It rather should be something like: >=20 > if (IS_ENABLED(CONFIG_ARC_HAS_PAE40)) > max_zone_pfn[ZONE_HIGHMEM] =3D max_high_pfn; > else > max_zone_pfn[ZONE_HIGHMEM] =3D min_low_pfn; >=20 Not sure if I understand why we should have min_low_pfn here. In !PAE40 cas= e max_high_pfn just will be smaller than min_low_pfn. Thank you, Vladimir Isaev