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Sat, 6 Aug 2022 10:29:04 +0800 Message-ID: <832b38ca-064e-0ab8-cd62-337d0d83d471@huawei.com> Date: Sat, 6 Aug 2022 10:29:03 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH 01/11] mm/ioremap: change the return value of io[re|un]map_allowed Content-Language: en-US To: Alexander Gordeev , Baoquan He CC: , , , , References: <20220801144029.57829-1-bhe@redhat.com> <20220801144029.57829-2-bhe@redhat.com> From: Kefeng Wang In-Reply-To: X-Originating-IP: [10.174.177.243] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220805_192919_255332_7785EDC9 X-CRM114-Status: GOOD ( 15.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Ck9uIDIwMjIvOC80IDIzOjQyLCBBbGV4YW5kZXIgR29yZGVldiB3cm90ZToKPiBPbiBNb24sIEF1 ZyAwMSwgMjAyMiBhdCAxMDo0MDoxOVBNICswODAwLCBCYW9xdWFuIEhlIHdyb3RlOgo+Cj4gSGkg QmFvcXVhbiwKPgo+PiAtLS0gYS9hcmNoL2FybTY0L21tL2lvcmVtYXAuYwo+PiArKysgYi9hcmNo L2FybTY0L21tL2lvcmVtYXAuYwo+PiBAQCAtMywxOSArMywyMCBAQAo+PiAgICNpbmNsdWRlIDxs aW51eC9tbS5oPgo+PiAgICNpbmNsdWRlIDxsaW51eC9pby5oPgo+PiAgIAo+PiAtYm9vbCBpb3Jl bWFwX2FsbG93ZWQocGh5c19hZGRyX3QgcGh5c19hZGRyLCBzaXplX3Qgc2l6ZSwgdW5zaWduZWQg bG9uZyBwcm90KQo+PiArdm9pZCBfX2lvbWVtICppb3JlbWFwX2FsbG93ZWQocGh5c19hZGRyX3Qg cGh5c19hZGRyLCBzaXplX3Qgc2l6ZSwgdW5zaWduZWQgbG9uZyBwcm90KQo+PiAgIHsKPj4gICAJ dW5zaWduZWQgbG9uZyBsYXN0X2FkZHIgPSBwaHlzX2FkZHIgKyBzaXplIC0gMTsKPj4gKwlpbnQg cmV0ID0gLUVJTlZBTDsKPiBJZiByZXQgdmFyaWFibGUgaXMgcmVhbGx5IG5lZWRlZD8KPgo+PiBk aWZmIC0tZ2l0IGEvaW5jbHVkZS9hc20tZ2VuZXJpYy9pby5oIGIvaW5jbHVkZS9hc20tZ2VuZXJp Yy9pby5oCj4+IGluZGV4IDcyOTc0Y2I4MTM0My4uZDcyZWIzMTBmYjNjIDEwMDY0NAo+PiAtLS0g YS9pbmNsdWRlL2FzbS1nZW5lcmljL2lvLmgKPj4gKysrIGIvaW5jbHVkZS9hc20tZ2VuZXJpYy9p by5oCj4+IEBAIC05NjcsMjYgKzk2NywyNyBAQCBzdGF0aWMgaW5saW5lIHZvaWQgaW91bm1hcCh2 b2xhdGlsZSB2b2lkIF9faW9tZW0gKmFkZHIpCj4+ICAgLyoKPj4gICAgKiBBcmNoIGNvZGUgY2Fu IGltcGxlbWVudCB0aGUgZm9sbG93aW5nIHR3byBob29rcyB3aGVuIHVzaW5nIEdFTkVSSUNfSU9S RU1BUAo+PiAgICAqIGlvcmVtYXBfYWxsb3dlZCgpIHJldHVybiBhIGJvb2wsCj4+IC0gKiAgIC0g dHJ1ZSBtZWFucyBjb250aW51ZSB0byByZW1hcAo+PiAtICogICAtIGZhbHNlIG1lYW5zIHNraXAg cmVtYXAgYW5kIHJldHVybiBkaXJlY3RseQo+PiArICogICAtIElTX0VSUiBtZWFucyByZXR1cm4g YW4gZXJyb3IKPj4gKyAqICAgLSBOVUxMIG1lYW5zIGNvbnRpbnVlIHRvIHJlbWFwCj4+ICsgKiAg IC0gYSBub24tTlVMTCwgbm9uLUlTX0VSUiBwb2ludGVyIGlzIHJldHVybmVkIGRpcmVjdGx5Cj4g SWYgaW9yZW1hcF9hbGxvd2VkKCkgcmV0dXJucyBhIHZhbGlkIHBvaW50ZXIsIHRoZW4gdGhlIGZ1 bmN0aW9uIG5hbWUKPiBpcyBub3QgYXMgcHJlY2lzZSBhbnltb3JlLgoKTWF5YmUgdXNlIGFyY2hf aW9yZW1hcC91bm1hcCBhcyBiZWZvcmUsIG9yIHNvbWUgYmV0dGVyIG5hbWUuCgo+Cj4+IEBAIC0y OCw4ICsyOSwxMSBAQCB2b2lkIF9faW9tZW0gKmlvcmVtYXBfcHJvdChwaHlzX2FkZHJfdCBwaHlz X2FkZHIsIHNpemVfdCBzaXplLAo+PiAgIAlwaHlzX2FkZHIgLT0gb2Zmc2V0Owo+PiAgIAlzaXpl ID0gUEFHRV9BTElHTihzaXplICsgb2Zmc2V0KTsKPj4gICAKPj4gLQlpZiAoIWlvcmVtYXBfYWxs b3dlZChwaHlzX2FkZHIsIHNpemUsIHByb3QpKQo+PiArCWJhc2UgPSBpb3JlbWFwX2FsbG93ZWQo cGh5c19hZGRyLCBzaXplLCBwcm90KTsKPj4gKwlpZiAoSVNfRVJSKGJhc2UpKQo+PiAgIAkJcmV0 dXJuIE5VTEw7Cj4+ICsJZWxzZSBpZiAoYmFzZSkKPj4gKwkJcmV0dXJuIGJhc2U7Cj4gSXQgaXMg cHJvYmFibHkganVzdCBtZSwgYnV0IHRoZSBiYXNlIG5hbWUgYml0IG1pc2xlYWRpbmcgaGVyZS4K V2UgY291bGQgcmV1c2UgdmFkZHIsIG5vdCBhZGQgbmV3IGJhc2UuCj4KPj4gQEAgLTUwLDkgKzU0 LDkgQEAgRVhQT1JUX1NZTUJPTChpb3JlbWFwX3Byb3QpOwo+PiAgIAo+PiAgIHZvaWQgaW91bm1h cCh2b2xhdGlsZSB2b2lkIF9faW9tZW0gKmFkZHIpCj4+ICAgewo+PiAtCXZvaWQgKnZhZGRyID0g KHZvaWQgKikoKHVuc2lnbmVkIGxvbmcpYWRkciAmIFBBR0VfTUFTSyk7Cj4+ICsJdm9pZCBfX2lv bWVtICp2YWRkciA9ICh2b2lkIF9faW9tZW0gKikoKHVuc2lnbmVkIGxvbmcpYWRkciAmIFBBR0Vf TUFTSyk7Cj4+ICAgCj4+IC0JaWYgKCFpb3VubWFwX2FsbG93ZWQodmFkZHIpKQo+PiArCWlmIChp b3VubWFwX2FsbG93ZWQodmFkZHIpKQo+IEkgZ3Vlc3MsIGlvdW5tYXBfYWxsb3dlZCgpIHNob3Vs ZCBhY2NlcHQgdm9pZCBfX2lvbWVtICosIG5vdCB2b2lkICouCj4gVGhlbiBhZGRyIG5lZWRzIHRv IGJlIHBhc3NlZCB0byBpb3VubWFwX2FsbG93ZWQoKSBub3QgdmFkZHIuCgpUaGUgZm9sbG93aW5n IGlzX3ZtYWxsb2NfYWRkcigpwqAgYW5kIHZ1bm1hcCgpIGluIGlvdW5tYXAoKSB1c2Ugdm9pZCAq LAoKc28gd2UgY291bGQgc2ltcGx5IHVzZSB2b2lkKiBmb3IgaW91bm1hcF9hbGxvd2VkKCkuCgo+ Cj4+ICAgCQlyZXR1cm47Cj4gLgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5l bEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4v bGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=