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Thu, 20 Dec 2018 15:32:53 +0100 From: Eugeniy Paltsev To: "hch@lst.de" , Vineet Gupta , "iommu@lists.linux-foundation.org" CC: "linux-kernel@vger.kernel.org" , "linux-s390@vger.kernel.org" , "linux-xtensa@linux-xtensa.org" , "linux-m68k@lists.linux-m68k.org" , "linux-alpha@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" , "openrisc@lists.librecores.org" , "ashutosh.dixit@intel.com" , "linux-parisc@vger.kernel.org" , "linux-c6x-dev@linux-c6x.org" , "monstr@monstr.eu" , "sparclinux@vger.kernel.org" Subject: Re: ensure dma_alloc_coherent always returns zeroed memory Thread-Topic: ensure dma_alloc_coherent always returns zeroed memory Thread-Index: AQHUk4aSEUXLnU4haEedcBZA0NDmW6WGQKSAgAFpToA= Date: Thu, 20 Dec 2018 14:32:52 +0000 Message-ID: <1545316369.14089.20.camel@synopsys.com> References: <20181214082515.14835-1-hch@lst.de> <20181219165939.GA26087@lst.de> In-Reply-To: <20181219165939.GA26087@lst.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.121.3.66] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SGkgQ2hyaXN0b3BoLA0KDQpJIHRlc3Qga2VybmVsIGZyb20geW91ciAnZG1hLWFsbG9jLWFsd2F5 cy16ZXJvJyBicmFuY2gsIGFuZCBhcw0KSSBjYW4gc2VlIHdlIGhhdmUgRE1BIHBlcmlwaGVyYWxz IChsaWtlIFVTQikgYnJva2VuLg0KDQpUaGVyZSBhcmUgdGhlIGVycm9ycyBleGFtcGxlIEkgZ290 IGR1cmluZyBVU0IgaW5pdGlhbGl6aW5nOg0KLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t PjgtLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQ0KdXNiIDEtMTogZGV2aWNlIGRlc2Ny aXB0b3IgcmVhZC82NCwgZXJyb3IgLTExMA0KdXNiIHVzYjEtcG9ydDE6IGF0dGVtcHQgcG93ZXIg Y3ljbGUNCnVzYiAxLTE6IG5ldyBoaWdoLXNwZWVkIFVTQiBkZXZpY2UgbnVtYmVyIDQgdXNpbmcg ZWhjaS1wbGF0Zm9ybQ0KdXNiIDEtMTogZGV2aWNlIGRlc2NyaXB0b3IgcmVhZC82NCwgZXJyb3Ig LTExMA0KdXNiIDEtMTogZGV2aWNlIGRlc2NyaXB0b3IgcmVhZC82NCwgZXJyb3IgLTExMA0KdXNi IDEtMTogbmV3IGhpZ2gtc3BlZWQgVVNCIGRldmljZSBudW1iZXIgNSB1c2luZyBlaGNpLXBsYXRm b3JtDQp1c2IgMS0xOiBkZXZpY2UgZGVzY3JpcHRvciByZWFkLzY0LCBlcnJvciAtMTEwDQp1c2Ig MS0xOiBkZXZpY2UgZGVzY3JpcHRvciByZWFkLzY0LCBlcnJvciAtMTEwDQp1c2IgdXNiMS1wb3J0 MTogdW5hYmxlIHRvIGVudW1lcmF0ZSBVU0IgZGV2aWNlDQp1c2IgMi0xOiBuZXcgZnVsbC1zcGVl ZCBVU0IgZGV2aWNlIG51bWJlciAyIHVzaW5nIG9oY2ktcGxhdGZvcm0NCnVzYiAyLTE6IGRldmlj ZSBkZXNjcmlwdG9yIHJlYWQvYWxsLCBlcnJvciAtODQNCnVzYiAyLTE6IG5ldyBmdWxsLXNwZWVk IFVTQiBkZXZpY2UgbnVtYmVyIDMgdXNpbmcgb2hjaS1wbGF0Zm9ybQ0KdXNiIDItMTogZGV2aWNl IGRlc2NyaXB0b3IgcmVhZC9hbGwsIGVycm9yIC04NA0KdXNiIHVzYjItcG9ydDE6IGF0dGVtcHQg cG93ZXIgY3ljbGUNCnVzYiAyLTE6IG5ldyBmdWxsLXNwZWVkIFVTQiBkZXZpY2UgbnVtYmVyIDQg dXNpbmcgb2hjaS1wbGF0Zm9ybQ0KdXNiIDItMTogZGV2aWNlIGRlc2NyaXB0b3IgcmVhZC84LCBl cnJvciAtNjINCnVzYiAyLTE6IGRldmljZSBkZXNjcmlwdG9yIHJlYWQvOCwgZXJyb3IgLTYyDQp1 c2IgMi0xOiBuZXcgZnVsbC1zcGVlZCBVU0IgZGV2aWNlIG51bWJlciA1IHVzaW5nIG9oY2ktcGxh dGZvcm0NCnVzYiAyLTE6IGRldmljZSBkZXNjcmlwdG9yIHJlYWQvOCwgZXJyb3IgLTg0DQp1c2Ig Mi0xOiBkZXZpY2UgZGVzY3JpcHRvciByZWFkLzgsIGVycm9yIC04NA0KdXNiIHVzYjItcG9ydDE6 IHVuYWJsZSB0byBlbnVtZXJhdGUgVVNCIGRldmljZQ0KIFtzbmlwXQ0KLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tODwtLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQ0KDQoNCk9u IFdlZCwgMjAxOC0xMi0xOSBhdCAxNzo1OSArMDEwMCwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6 DQo+IEZZSSwgSSd2ZSBwaWNrZWQgdGhpcyB1cCBmb3IgZG1hLW1hcHBpbmcgZm9yLW5leHQgbm93 Lg0KPiANCj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18N Cj4gbGludXgtc25wcy1hcmMgbWFpbGluZyBsaXN0DQo+IGxpbnV4LXNucHMtYXJjQGxpc3RzLmlu ZnJhZGVhZC5vcmcNCj4gaHR0cHM6Ly91cmxkZWZlbnNlLnByb29mcG9pbnQuY29tL3YyL3VybD91 PWh0dHAtM0FfX2xpc3RzLmluZnJhZGVhZC5vcmdfbWFpbG1hbl9saXN0aW5mb19saW51eC0yRHNu cHMtMkRhcmMmZD1Ed0lDQWcmYz1EUEw2X1hfNkprWEZ4N0FYV3FCMHRnJnI9WmxKTg0KPiAxTXJp UFVUa0JLQ3JQU3g2N0dtYXBsRVVHY0FFazl5UHRDTGRVWEkmbT1uYUJDVDk2QTRSU1FKTHpCV3p1 Q2NtcHRGR2lRRGZGVE9XSnBwcnFESVZrJnM9Y0hGODR2YTg5b2ZQNlZsclY2ODNld0VOVVhkYUxX N29wYW1MWlNrWkJnayZlPQ0KLS0gDQogRXVnZW5peSBQYWx0c2V2