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[2003:ea:8f1f:bb00:9424:822a:45ae:b5bd]) by smtp.googlemail.com with ESMTPSA id y18sm34010488wrq.61.2021.03.30.03.54.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Mar 2021 03:54:59 -0700 (PDT) Subject: Re: [PATCH] dma-mapping: add unlikely hint to error path in dma_mapping_error To: Robin Murphy , Christoph Hellwig , Marek Szyprowski References: <78757abc-ef8f-9a29-9020-967370eec365@gmail.com> From: Heiner Kallweit Message-ID: <53eacdf4-5184-217b-81f4-fec9e5eeb400@gmail.com> Date: Tue, 30 Mar 2021 12:54:54 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: "open list:AMD IOMMU \(AMD-VI\)" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" T24gMzAuMDMuMjAyMSAxMjoyMSwgUm9iaW4gTXVycGh5IHdyb3RlOgo+IE9uIDIwMjEtMDMtMjYg MjE6MDMsIEhlaW5lciBLYWxsd2VpdCB3cm90ZToKPj4gWmlsbGlvbnMgb2YgZHJpdmVycyB1c2Ug dGhlIHVubGlrZWx5KCkgaGludCB3aGVuIGNoZWNraW5nIHRoZSByZXN1bHQgb2YKPj4gZG1hX21h cHBpbmdfZXJyb3IoKS4gVGhpcyBpcyBhbiBpbmxpbmUgZnVuY3Rpb24gYW55d2F5LCBzbyB3ZSBj YW4gbW92ZQo+PiB0aGUgaGludCBpbnRvIHRoZSBmdW5jdGlvbiBhbmQgcmVtb3ZlIGl0IGZyb20g ZHJpdmVycyBvdmVyIHRpbWUuCj4gCj4gSSdtIHByZXR0eSBzdXJlIEkgcmV2aWV3ZWQgdGhpcyBs YXN0IHRpbWUgLSBwbGVhc2UgcmVtZW1iZXIgdG8gcGljayB1cCB0YWdzIGZyb20gcHJldmlvdXMg dmVyc2lvbnMgd2hlbiByZXBvc3RpbmcuCj4gCgpSaWdodCwgeW91IGRpZC4gTXkgYmFkLgoKCj4g VGhhbmtzLAo+IFJvYmluLgo+IAo+PiBTaWduZWQtb2ZmLWJ5OiBIZWluZXIgS2FsbHdlaXQgPGhr YWxsd2VpdDFAZ21haWwuY29tPgo+PiAtLS0KPj4gVGhpcyBpcyBhIHJlc2VuZCBvZiBhIHBhdGNo IGZyb20gRGVjIDIwMjAgd2hlbiBJIHRyaWVkIHRvIGRvIGl0Cj4+IHRyZWUtd2lkZS4gTm93IHN0 YXJ0IHdpdGggdGhlIGFjdHVhbCBjaGFuZ2UsIGRyaXZlcnMgY2FuIGJlIGNoYW5nZWQKPj4gYWZ0 ZXJ3YXJkcywgbWF5YmUgcGVyIHN1YnN5c3RlbS4KPj4gLS0tCj4+IMKgIGluY2x1ZGUvbGludXgv ZG1hLW1hcHBpbmcuaCB8IDIgKy0KPj4gwqAgMSBmaWxlIGNoYW5nZWQsIDEgaW5zZXJ0aW9uKCsp LCAxIGRlbGV0aW9uKC0pCj4+Cj4+IGRpZmYgLS1naXQgYS9pbmNsdWRlL2xpbnV4L2RtYS1tYXBw aW5nLmggYi9pbmNsdWRlL2xpbnV4L2RtYS1tYXBwaW5nLmgKPj4gaW5kZXggZTlkMTliOTc0Li4x ODNlNzEwM2EgMTAwNjQ0Cj4+IC0tLSBhL2luY2x1ZGUvbGludXgvZG1hLW1hcHBpbmcuaAo+PiAr KysgYi9pbmNsdWRlL2xpbnV4L2RtYS1tYXBwaW5nLmgKPj4gQEAgLTk1LDcgKzk1LDcgQEAgc3Rh dGljIGlubGluZSBpbnQgZG1hX21hcHBpbmdfZXJyb3Ioc3RydWN0IGRldmljZSAqZGV2LCBkbWFf YWRkcl90IGRtYV9hZGRyKQo+PiDCoCB7Cj4+IMKgwqDCoMKgwqAgZGVidWdfZG1hX21hcHBpbmdf ZXJyb3IoZGV2LCBkbWFfYWRkcik7Cj4+IMKgIC3CoMKgwqAgaWYgKGRtYV9hZGRyID09IERNQV9N QVBQSU5HX0VSUk9SKQo+PiArwqDCoMKgIGlmICh1bmxpa2VseShkbWFfYWRkciA9PSBETUFfTUFQ UElOR19FUlJPUikpCj4+IMKgwqDCoMKgwqDCoMKgwqDCoCByZXR1cm4gLUVOT01FTTsKPj4gwqDC oMKgwqDCoCByZXR1cm4gMDsKPj4gwqAgfQo+PgoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4 LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2lvbW11