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b=sLmXwHgFuqqapxRe3+yeZKK7CDPOs5xCFuV15p5m/gNNZUxfaxQNNl1rElZVR4pCi Ppty/+tE0UhCDIXeAfmiFjsuaVq69GF8A6+zw1hbKjOqCBWxjQu9qN7p4SoNcfxHP9 6URjiAPZPAAlNrGRJwtt4UmKUbSGVe8q8G7B/Moc= Date: Mon, 21 Aug 2023 13:21:19 -0700 From: Andrew Morton To: Qi Zheng Cc: Will Deacon , Qi Zheng , catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, muchun.song@linux.dev, pasha.tatashin@soleen.com, wangkefeng.wang@huawei.co Subject: Re: [PATCH] arm64: mm: use ptep_clear() instead of pte_clear() in clear_flush() Message-Id: <20230821132119.110668fde87a29443f0bff28@linux-foundation.org> In-Reply-To: References: <20230810093241.1181142-1-qi.zheng@linux.dev> <20230811110311.GB6993@willie-the-truck> <20230811112107.GE6993@willie-the-truck> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230821_132123_377703_6D93A460 X-CRM114-Status: GOOD ( 22.33 ) 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gRnJpLCAxMSBBdWcgMjAyMyAxOToyODo0MSArMDgwMCBRaSBaaGVuZyA8emhlbmdxaS5hcmNo QGJ5dGVkYW5jZS5jb20+IHdyb3RlOgoKPiBXaWxsIERlYWNvbiA8d2lsbEBrZXJuZWwub3JnPuS6 jjIwMjPlubQ45pyIMTHml6Ug5ZGo5LqUMTk6MjHlhpnpgZPvvJoKPiAKPiA+IE9uIEZyaSwgQXVn IDExLCAyMDIzIGF0IDA3OjE2OjIwUE0gKzA4MDAsIFFpIFpoZW5nIHdyb3RlOgo+ID4gPiAgICBX aWxsIERlYWNvbiA8WzFdd2lsbEBrZXJuZWwub3JnPuS6jjIwMjPlubQ45pyIMTHml6Ug5ZGo5LqU MTk6MDPlhpnpgZPvvJoKPiA+ID4KPiA+ID4gICAgICBPbiBUaHUsIEF1ZyAxMCwgMjAyMyBhdCAw OTozMjo0MUFNICswMDAwLCBRaSBaaGVuZyB3cm90ZToKPiA+ID4gICAgICA+IEZyb206IFFpIFpo ZW5nIDxbMl16aGVuZ3FpLmFyY2hAYnl0ZWRhbmNlLmNvbT4KPiA+ID4gICAgICA+Cj4gPiA+ICAg ICAgPiBJbiBjbGVhcl9mbHVzaCgpLCB0aGUgb3JpZ2luYWwgcHRlIG1heSBiZSBhIHByZXNlbnQg ZW50cnksIHNvIHdlCj4gPiA+ICAgICAgc2hvdWxkCj4gPiA+ICAgICAgPiB1c2UgcHRlcF9jbGVh cigpIHRvIGxldCBwYWdlX3RhYmxlX2NoZWNrIHRyYWNrIHRoZSBwdGUgY2xlYXJpbmcKPiA+ID4g ICAgICBvcGVyYXRpb24sCj4gPiA+ICAgICAgPiBvdGhlcndpc2UgaXQgbWF5IGNhdXNlIGZhbHNl IHBvc2l0aXZlIGluIHN1YnNlcXVlbnQgc2V0X3B0ZV9hdCgpLgo+ID4gPgo+ID4gPiAgICAgIElz bid0IHRoaXMgdHJ1ZSBmb3IgbW9zdCB1c2VycyBvZiBwdGVfY2xlYXIoKT8gVGhlcmUgYXJlIHNv bWUgaW4gdGhlCj4gPiA+ICAgICAgY29yZQo+ID4gPiAgICAgIGNvZGUsIHNvIGNvdWxkIHRoZXkg dHJpZ2dlciB0aGUgZmFsc2UgcG9zaXRpdmUgYXMgd2VsbD8KPiA+ID4KPiA+ID4gICAgTm8sIHRo ZSBQVEUgZW50cnkgaW4gb3RoZXIgcGxhY2VzIHdoZXJlIHB0ZV9jbGVhcigpIGlzIHVzZWQgaXMK PiA+IG5vbi1wcmVzZW50Cj4gPiA+ICAgIFBURS4KPiA+ID4gICAgVGhlIHBhZ2VfdGFibGVfY2hl Y2sgZG9lcyBub3QgZG9lcyB0cmFjayB0aGUgcHRlIG9wZXJhdGlvbiBpbiB0aGlzCj4gPiBjYXNl LAo+ID4gPiAgICBzbyBpdCB3aWxsIG5vdCBjYXVzZSBmYWxzZSBwb3NpdGl2ZXMuCj4gPgo+ID4g QXJlIHlvdSBzdXJlPyBGb3IgZXhhbXBsZSwgdGhlIGNhbGwgZnJvbSBmbHVzaF9hbGxfemVyb19w a21hcHMoKSBpbgo+ID4gaGlnaG1lbS5jIHJlYWxseSBsb29rcyBsaWtlIGl0J3MgY2xlYXJpbmcg YSB2YWxpZCBlbnRyeS4gTm90IHRoYXQgYXJtNjQKPiA+IGNhcmVzIGFib3V0IGhpZ2htZW0sIGJ1 dCBzdGlsbC4KPiAKPiAKPiBBaCwgdGhpcyBpcyBpbml0X21tLCBub3QgdXNlciBtbSwgcGFnZV90 YWJsZV9jaGVjayBkb2VzIG5vdCBjYXJlIGFib3V0IHRoaXMKPiBjYXNlLgoKSXQncyB1bmNsZWFy IHdoZXJlIHdlIHN0YW5kIHdpdGggdGhpcyBwYXRjaC4gIEFuIGFjayBvciBhIG5hY2ssIHBsZWFz ZT8KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4 LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFk Lm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFy bS1rZXJuZWwK