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[79.139.233.37]) by smtp.googlemail.com with ESMTPSA id 21sm1055977ljv.19.2020.01.29.06.21.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 29 Jan 2020 06:21:58 -0800 (PST) Subject: Re: [PATCH 3/5] mm/mremap: use pmd_addr_end to calculate next in move_page_tables() To: Russell King - ARM Linux admin References: <20200117232254.2792-1-richardw.yang@linux.intel.com> <20200117232254.2792-4-richardw.yang@linux.intel.com> <7147774a-14e9-4ff3-1548-4565f0d214d5@gmail.com> <20200129094738.GE25745@shell.armlinux.org.uk> From: Dmitry Osipenko Message-ID: <2791a187-ec3e-6b78-515f-25e7559a3749@gmail.com> Date: Wed, 29 Jan 2020 17:21:55 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <20200129094738.GE25745@shell.armlinux.org.uk> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200129_062205_247516_EE44BF03 X-CRM114-Status: GOOD ( 21.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thellstrom@vmware.com, yang.shi@linux.alibaba.com, aneesh.kumar@linux.ibm.com, linux-kernel@vger.kernel.org, Jon Hunter , linux-mm@kvack.org, Thierry Reding , Wei Yang , "linux-tegra@vger.kernel.org" , kirill@shutemov.name, akpm@linux-foundation.org, dan.j.williams@intel.com, "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org MjkuMDEuMjAyMCAxMjo0NywgUnVzc2VsbCBLaW5nIC0gQVJNIExpbnV4IGFkbWluINC/0LjRiNC1 0YI6Cj4gT24gU3VuLCBKYW4gMjYsIDIwMjAgYXQgMDU6NDc6NTdQTSArMDMwMCwgRG1pdHJ5IE9z aXBlbmtvIHdyb3RlOgo+PiAxOC4wMS4yMDIwIDAyOjIyLCBXZWkgWWFuZyDQv9C40YjQtdGCOgo+ Pj4gVXNlIHRoZSBnZW5lcmFsIGhlbHBlciBpbnN0ZWFkIG9mIGRvIGl0IGJ5IGhhbmQuCj4+Pgo+ Pj4gU2lnbmVkLW9mZi1ieTogV2VpIFlhbmcgPHJpY2hhcmR3LnlhbmdAbGludXguaW50ZWwuY29t Pgo+Pj4gLS0tCj4+PiAgbW0vbXJlbWFwLmMgfCA3ICsrLS0tLS0KPj4+ICAxIGZpbGUgY2hhbmdl ZCwgMiBpbnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygtKQo+Pj4KPj4+IGRpZmYgLS1naXQgYS9t bS9tcmVtYXAuYyBiL21tL21yZW1hcC5jCj4+PiBpbmRleCBjMmFmOGJhNGJhNDMuLmEyNTg5MTRm M2VlMSAxMDA2NDQKPj4+IC0tLSBhL21tL21yZW1hcC5jCj4+PiArKysgYi9tbS9tcmVtYXAuYwo+ Pj4gQEAgLTI1MywxMSArMjUzLDggQEAgdW5zaWduZWQgbG9uZyBtb3ZlX3BhZ2VfdGFibGVzKHN0 cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hLAo+Pj4gIAo+Pj4gIAlmb3IgKDsgb2xkX2FkZHIgPCBv bGRfZW5kOyBvbGRfYWRkciArPSBleHRlbnQsIG5ld19hZGRyICs9IGV4dGVudCkgewo+Pj4gIAkJ Y29uZF9yZXNjaGVkKCk7Cj4+PiAtCQluZXh0ID0gKG9sZF9hZGRyICsgUE1EX1NJWkUpICYgUE1E X01BU0s7Cj4+PiAtCQkvKiBldmVuIGlmIG5leHQgb3ZlcmZsb3dlZCwgZXh0ZW50IGJlbG93IHdp bGwgYmUgb2sgKi8KPj4+ICsJCW5leHQgPSBwbWRfYWRkcl9lbmQob2xkX2FkZHIsIG9sZF9lbmQp Owo+Pj4gIAkJZXh0ZW50ID0gbmV4dCAtIG9sZF9hZGRyOwo+Pj4gLQkJaWYgKGV4dGVudCA+IG9s ZF9lbmQgLSBvbGRfYWRkcikKPj4+IC0JCQlleHRlbnQgPSBvbGRfZW5kIC0gb2xkX2FkZHI7Cj4+ PiAgCQlvbGRfcG1kID0gZ2V0X29sZF9wbWQodm1hLT52bV9tbSwgb2xkX2FkZHIpOwo+Pj4gIAkJ aWYgKCFvbGRfcG1kKQo+Pj4gIAkJCWNvbnRpbnVlOwo+Pj4gQEAgLTMwMSw3ICsyOTgsNyBAQCB1 bnNpZ25lZCBsb25nIG1vdmVfcGFnZV90YWJsZXMoc3RydWN0IHZtX2FyZWFfc3RydWN0ICp2bWEs Cj4+PiAgCj4+PiAgCQlpZiAocHRlX2FsbG9jKG5ld192bWEtPnZtX21tLCBuZXdfcG1kKSkKPj4+ ICAJCQlicmVhazsKPj4+IC0JCW5leHQgPSAobmV3X2FkZHIgKyBQTURfU0laRSkgJiBQTURfTUFT SzsKPj4+ICsJCW5leHQgPSBwbWRfYWRkcl9lbmQobmV3X2FkZHIsIG5ld19hZGRyICsgbGVuKTsK Pj4+ICAJCWlmIChleHRlbnQgPiBuZXh0IC0gbmV3X2FkZHIpCj4+PiAgCQkJZXh0ZW50ID0gbmV4 dCAtIG5ld19hZGRyOwo+Pj4gIAkJbW92ZV9wdGVzKHZtYSwgb2xkX3BtZCwgb2xkX2FkZHIsIG9s ZF9hZGRyICsgZXh0ZW50LCBuZXdfdm1hLAo+Pj4KPj4KPj4gSGVsbG8gV2VpLAo+Pgo+PiBTdGFy dGluZyB3aXRoIG5leHQtMjAyMDAxMjIsIEknbSBzZWVpbmcgdGhlIGZvbGxvd2luZyBpbiBLTVNH IG9uIE5WSURJQQo+PiBUZWdyYSAoQVJNMzIpOgo+Pgo+PiAgIEJVRzogQmFkIHJzcy1jb3VudGVy IHN0YXRlIG1tOihwdHJ2YWwpIHR5cGU6TU1fQU5PTlBBR0VTIHZhbDoxOTAKPj4KPj4gYW5kIGV2 ZW50dWFsbHkga2VybmVsIGhhbmdzLgo+Pgo+PiBHaXQncyBiaXNlY3Rpb24gcG9pbnRzIHRvIHRo aXMgcGF0Y2ggYW5kIHJldmVydGluZyBpdCBoZWxwcy4gUGxlYXNlIGZpeCwKPj4gdGhhbmtzIGlu IGFkdmFuY2UuCj4gCj4gVGhlIGFib3ZlIGlzIGRlZmluaXRlbHkgd3JvbmcgLSBwWFhfYWRkcl9l bmQoKSBhcmUgZGVzaWduZWQgdG8gYmUgdXNlZAo+IHdpdGggYW4gYWRkcmVzcyBpbmRleCB3aXRo aW4gdGhlIHBYWCB0YWJsZSB0YWJsZSBhbmQgdGhlIGFkZHJlc3MgaW5kZXgKPiBvZiBlaXRoZXIg dGhlIGxhc3QgZW50cnkgaW4gdGhlIHNhbWUgcFhYIHRhYmxlIG9yIHRoZSBiZWdpbm5pbmcgb2Yg dGhlCj4gX25leHRfIHBYWCB0YWJsZS4gIEFyYml0YXJ5IGVuZCBhZGRyZXNzIGluZGljaWVzIGFy ZSBub3QgYWxsb3dlZC4KPiAKPiBXaGVuIHBhZ2UgdGFibGVzIGFyZSAicm9sbGVkIHVwIiB3aGVu IGxldmVscyBkb24ndCBleGlzdCwgaXQgaXMgY29tbW9uCj4gcHJhY3RpY2UgZm9yIHRoZXNlIG1h Y3JvcyB0byBqdXN0IHJldHVybiB0aGVpciBlbmQgYWRkcmVzcyBpbmRleC4KPiBIZW5jZSwgaWYg dGhleSBhcmUgdXNlZCB3aXRoIGFyYml0YXJ5IGVuZCBhZGRyZXNzIGluZGljaWVzLCB0aGVuIHRo ZQo+IGl0ZXJhdGlvbiB3aWxsIGZhaWwuCj4gCj4gVGhlIG9ubHkgd2F5IHRvIGRvIHRoaXMgaXM6 Cj4gCj4gCW5leHQgPSBwbWRfYWRkcl9lbmQob2xkX2FkZHIsCj4gCQkJcHVkX2FkZHJfZW5kKG9s ZF9hZGRyLAo+IAkJCQlwNGRfYWRkcl9lbmQob2xkX2FkZHIsCj4gCQkJCQlwZ2RfYWRkcl9lbmQo b2xkX2FkZHIsIG9sZF9lbmQpKSkpOwo+IAo+IHdoaWNoIGdpdmVzIHBtZF9hZGRyX2VuZCgpIChh bmQgZWFjaCBvZiB0aGUgaW50ZXJtZWRpYXRlIHBYWF9hZGRyX2VuZCgpKQo+IHRoZSBjb3JyZWN0 IGVuZCBhcmd1bWVudC4gIEhvd2V2ZXIsIHRoYXQncyBhIG1vcmUgY29tcGxleCBhbmQgdmVyYm9z ZSwKPiBhbmQgbGlrZWx5IGxlc3MgZWZmaWNpZW50IHRoYW4gdGhlIGN1cnJlbnQgY29kZS4KPiAK PiBJJ2Qgc3VnZ2VzdCB0aGF0IHRoZXJlJ3Mgbm90aGluZyB0byAiZml4IiBpbiB0aGUgdjUuNSBj b2RlIHdydCB0aGlzLAo+IGFuZCB0cnlpbmcgdG8gImNsZWFuIGl0IHVwIiB3aWxsIGp1c3QgcmVz dWx0IGluIGxlc3MgZWZmaWNpZW50IG9yCj4gYnJva2VuIGNvZGUuCj4gCgpIZWxsbyBSdXNzZWxs LAoKVGhhbmsgeW91IHZlcnkgbXVjaCBmb3IgdGhlIGV4dHJhIGNsYXJpZmljYXRpb24hCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2Vy bmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0 cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVs Cg==