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Received: from shell.armlinux.org.uk ([2002:4e20:1eda:1:5054:ff:fe00:4ec]:40686) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1iwjwo-0004cD-0g; Wed, 29 Jan 2020 09:47:46 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1iwjwg-0003Id-Df; Wed, 29 Jan 2020 09:47:38 +0000 Date: Wed, 29 Jan 2020 09:47:38 +0000 From: Russell King - ARM Linux admin To: Dmitry Osipenko Subject: Re: [PATCH 3/5] mm/mremap: use pmd_addr_end to calculate next in move_page_tables() Message-ID: <20200129094738.GE25745@shell.armlinux.org.uk> References: <20200117232254.2792-1-richardw.yang@linux.intel.com> <20200117232254.2792-4-richardw.yang@linux.intel.com> <7147774a-14e9-4ff3-1548-4565f0d214d5@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <7147774a-14e9-4ff3-1548-4565f0d214d5@gmail.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200129_014830_470245_1C804DC1 X-CRM114-Status: GOOD ( 18.28 ) 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 T24gU3VuLCBKYW4gMjYsIDIwMjAgYXQgMDU6NDc6NTdQTSArMDMwMCwgRG1pdHJ5IE9zaXBlbmtv IHdyb3RlOgo+IDE4LjAxLjIwMjAgMDI6MjIsIFdlaSBZYW5nINC/0LjRiNC10YI6Cj4gPiBVc2Ug dGhlIGdlbmVyYWwgaGVscGVyIGluc3RlYWQgb2YgZG8gaXQgYnkgaGFuZC4KPiA+IAo+ID4gU2ln bmVkLW9mZi1ieTogV2VpIFlhbmcgPHJpY2hhcmR3LnlhbmdAbGludXguaW50ZWwuY29tPgo+ID4g LS0tCj4gPiAgbW0vbXJlbWFwLmMgfCA3ICsrLS0tLS0KPiA+ICAxIGZpbGUgY2hhbmdlZCwgMiBp bnNlcnRpb25zKCspLCA1IGRlbGV0aW9ucygtKQo+ID4gCj4gPiBkaWZmIC0tZ2l0IGEvbW0vbXJl bWFwLmMgYi9tbS9tcmVtYXAuYwo+ID4gaW5kZXggYzJhZjhiYTRiYTQzLi5hMjU4OTE0ZjNlZTEg MTAwNjQ0Cj4gPiAtLS0gYS9tbS9tcmVtYXAuYwo+ID4gKysrIGIvbW0vbXJlbWFwLmMKPiA+IEBA IC0yNTMsMTEgKzI1Myw4IEBAIHVuc2lnbmVkIGxvbmcgbW92ZV9wYWdlX3RhYmxlcyhzdHJ1Y3Qg dm1fYXJlYV9zdHJ1Y3QgKnZtYSwKPiA+ICAKPiA+ICAJZm9yICg7IG9sZF9hZGRyIDwgb2xkX2Vu ZDsgb2xkX2FkZHIgKz0gZXh0ZW50LCBuZXdfYWRkciArPSBleHRlbnQpIHsKPiA+ICAJCWNvbmRf cmVzY2hlZCgpOwo+ID4gLQkJbmV4dCA9IChvbGRfYWRkciArIFBNRF9TSVpFKSAmIFBNRF9NQVNL Owo+ID4gLQkJLyogZXZlbiBpZiBuZXh0IG92ZXJmbG93ZWQsIGV4dGVudCBiZWxvdyB3aWxsIGJl IG9rICovCj4gPiArCQluZXh0ID0gcG1kX2FkZHJfZW5kKG9sZF9hZGRyLCBvbGRfZW5kKTsKPiA+ ICAJCWV4dGVudCA9IG5leHQgLSBvbGRfYWRkcjsKPiA+IC0JCWlmIChleHRlbnQgPiBvbGRfZW5k IC0gb2xkX2FkZHIpCj4gPiAtCQkJZXh0ZW50ID0gb2xkX2VuZCAtIG9sZF9hZGRyOwo+ID4gIAkJ b2xkX3BtZCA9IGdldF9vbGRfcG1kKHZtYS0+dm1fbW0sIG9sZF9hZGRyKTsKPiA+ICAJCWlmICgh b2xkX3BtZCkKPiA+ICAJCQljb250aW51ZTsKPiA+IEBAIC0zMDEsNyArMjk4LDcgQEAgdW5zaWdu ZWQgbG9uZyBtb3ZlX3BhZ2VfdGFibGVzKHN0cnVjdCB2bV9hcmVhX3N0cnVjdCAqdm1hLAo+ID4g IAo+ID4gIAkJaWYgKHB0ZV9hbGxvYyhuZXdfdm1hLT52bV9tbSwgbmV3X3BtZCkpCj4gPiAgCQkJ YnJlYWs7Cj4gPiAtCQluZXh0ID0gKG5ld19hZGRyICsgUE1EX1NJWkUpICYgUE1EX01BU0s7Cj4g PiArCQluZXh0ID0gcG1kX2FkZHJfZW5kKG5ld19hZGRyLCBuZXdfYWRkciArIGxlbik7Cj4gPiAg CQlpZiAoZXh0ZW50ID4gbmV4dCAtIG5ld19hZGRyKQo+ID4gIAkJCWV4dGVudCA9IG5leHQgLSBu ZXdfYWRkcjsKPiA+ICAJCW1vdmVfcHRlcyh2bWEsIG9sZF9wbWQsIG9sZF9hZGRyLCBvbGRfYWRk ciArIGV4dGVudCwgbmV3X3ZtYSwKPiA+IAo+IAo+IEhlbGxvIFdlaSwKPiAKPiBTdGFydGluZyB3 aXRoIG5leHQtMjAyMDAxMjIsIEknbSBzZWVpbmcgdGhlIGZvbGxvd2luZyBpbiBLTVNHIG9uIE5W SURJQQo+IFRlZ3JhIChBUk0zMik6Cj4gCj4gICBCVUc6IEJhZCByc3MtY291bnRlciBzdGF0ZSBt bToocHRydmFsKSB0eXBlOk1NX0FOT05QQUdFUyB2YWw6MTkwCj4gCj4gYW5kIGV2ZW50dWFsbHkg a2VybmVsIGhhbmdzLgo+IAo+IEdpdCdzIGJpc2VjdGlvbiBwb2ludHMgdG8gdGhpcyBwYXRjaCBh bmQgcmV2ZXJ0aW5nIGl0IGhlbHBzLiBQbGVhc2UgZml4LAo+IHRoYW5rcyBpbiBhZHZhbmNlLgoK VGhlIGFib3ZlIGlzIGRlZmluaXRlbHkgd3JvbmcgLSBwWFhfYWRkcl9lbmQoKSBhcmUgZGVzaWdu ZWQgdG8gYmUgdXNlZAp3aXRoIGFuIGFkZHJlc3MgaW5kZXggd2l0aGluIHRoZSBwWFggdGFibGUg dGFibGUgYW5kIHRoZSBhZGRyZXNzIGluZGV4Cm9mIGVpdGhlciB0aGUgbGFzdCBlbnRyeSBpbiB0 aGUgc2FtZSBwWFggdGFibGUgb3IgdGhlIGJlZ2lubmluZyBvZiB0aGUKX25leHRfIHBYWCB0YWJs ZS4gIEFyYml0YXJ5IGVuZCBhZGRyZXNzIGluZGljaWVzIGFyZSBub3QgYWxsb3dlZC4KCldoZW4g cGFnZSB0YWJsZXMgYXJlICJyb2xsZWQgdXAiIHdoZW4gbGV2ZWxzIGRvbid0IGV4aXN0LCBpdCBp cyBjb21tb24KcHJhY3RpY2UgZm9yIHRoZXNlIG1hY3JvcyB0byBqdXN0IHJldHVybiB0aGVpciBl bmQgYWRkcmVzcyBpbmRleC4KSGVuY2UsIGlmIHRoZXkgYXJlIHVzZWQgd2l0aCBhcmJpdGFyeSBl bmQgYWRkcmVzcyBpbmRpY2llcywgdGhlbiB0aGUKaXRlcmF0aW9uIHdpbGwgZmFpbC4KClRoZSBv bmx5IHdheSB0byBkbyB0aGlzIGlzOgoKCW5leHQgPSBwbWRfYWRkcl9lbmQob2xkX2FkZHIsCgkJ CXB1ZF9hZGRyX2VuZChvbGRfYWRkciwKCQkJCXA0ZF9hZGRyX2VuZChvbGRfYWRkciwKCQkJCQlw Z2RfYWRkcl9lbmQob2xkX2FkZHIsIG9sZF9lbmQpKSkpOwoKd2hpY2ggZ2l2ZXMgcG1kX2FkZHJf ZW5kKCkgKGFuZCBlYWNoIG9mIHRoZSBpbnRlcm1lZGlhdGUgcFhYX2FkZHJfZW5kKCkpCnRoZSBj b3JyZWN0IGVuZCBhcmd1bWVudC4gIEhvd2V2ZXIsIHRoYXQncyBhIG1vcmUgY29tcGxleCBhbmQg dmVyYm9zZSwKYW5kIGxpa2VseSBsZXNzIGVmZmljaWVudCB0aGFuIHRoZSBjdXJyZW50IGNvZGUu CgpJJ2Qgc3VnZ2VzdCB0aGF0IHRoZXJlJ3Mgbm90aGluZyB0byAiZml4IiBpbiB0aGUgdjUuNSBj b2RlIHdydCB0aGlzLAphbmQgdHJ5aW5nIHRvICJjbGVhbiBpdCB1cCIgd2lsbCBqdXN0IHJlc3Vs dCBpbiBsZXNzIGVmZmljaWVudCBvcgpicm9rZW4gY29kZS4KCi0tIApSTUsncyBQYXRjaCBzeXN0 ZW06IGh0dHBzOi8vd3d3LmFybWxpbnV4Lm9yZy51ay9kZXZlbG9wZXIvcGF0Y2hlcy8KRlRUQyBi cm9hZGJhbmQgZm9yIDAuOG1pbGUgbGluZSBpbiBzdWJ1cmJpYTogc3luYyBhdCAxMi4xTWJwcyBk b3duIDYyMmticHMgdXAKQWNjb3JkaW5nIHRvIHNwZWVkdGVzdC5uZXQ6IDExLjlNYnBzIGRvd24g NTAwa2JwcyB1cAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5p bmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8v bGludXgtYXJtLWtlcm5lbAo=