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[86.27.177.88]) by smtp.gmail.com with ESMTPSA id m126-20020a1ca384000000b003a03e63e428sm3276117wme.36.2022.07.20.08.33.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jul 2022 08:33:14 -0700 (PDT) Date: Wed, 20 Jul 2022 16:33:13 +0100 From: Lee Jones To: Will Deacon Cc: =?utf-8?B?aGFpYmluemhhbmco5byg5rW35paMKQ==?= , Catalin Marinas , Ard Biesheuvel , Martin Ma , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "hewenliang4@huawei.com" Subject: Re: [PATCH V2] arm64: fix oops in concurrently setting insn_emulation sysctls Message-ID: References: <9A004C03-250B-46C5-BF39-782D7551B00E@tencent.com> <20220720151344.GA16452@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220720151344.GA16452@willie-the-truck> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220720_083316_521575_22C0B7F3 X-CRM114-Status: GOOD ( 25.77 ) 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 T24gV2VkLCAyMCBKdWwgMjAyMiwgV2lsbCBEZWFjb24gd3JvdGU6Cgo+IE9uIFdlZCwgSnVsIDIw LCAyMDIyIGF0IDAxOjIzOjI0UE0gKzAxMDAsIExlZSBKb25lcyB3cm90ZToKPiA+IE9uIFNhdCwg MDIgSnVsIDIwMjIsIGhhaWJpbnpoYW5nKOW8oOa1t+aWjCkgd3JvdGU6Cj4gPiAKPiA+ID4gSG93 IHRvIHJlcHJvZHVjZToKPiA+ID4gICAgIGxhdW5jaCB0d28gc2hlbGwgZXhlY3V0aW9uczoKPiA+ ID4gICAgICAgICMhL2Jpbi9iYXNoCj4gPiA+ICAgICAgICB3aGlsZSBbIDEgXTsKPiA+ID4gICAg ICAgIGRvCj4gPiA+ICAgICAgICAgICAgZWNobyAxID4gL3Byb2Mvc3lzL2FiaS9zd3AKPiA+ID4g ICAgICAgIGRvbmUKPiA+ID4gCj4gPiA+IE9vcHMgaW5mbzoKPiA+ID4gICAgIFVuYWJsZSB0byBo YW5kbGUga2VybmVsIE5VTEwgcG9pbnRlciBkZXJlZmVyZW5jZSBhdCB2aXJ0dWFsIGFkZHJlc3Mg MDAwMDAwMDAwMDAwMDAxMAo+ID4gPiAgICAgSW50ZXJuYWwgZXJyb3I6IE9vcHM6IDk2MDAwMDA2 IFsjMV0gU01QCj4gPiA+ICAgICBDYWxsIHRyYWNlOgo+ID4gPiAgICAgdXBkYXRlX2luc25fZW11 bGF0aW9uX21vZGUrMHhjMC8weDE0OAo+ID4gPiAgICAgZW11bGF0aW9uX3Byb2NfaGFuZGxlcisw eDY0LzB4YjgKPiA+ID4gICAgIHByb2Nfc3lzX2NhbGxfaGFuZGxlcisweDljLzB4ZjgKPiA+ID4g ICAgIHByb2Nfc3lzX3dyaXRlKzB4MTgvMHgyMAo+ID4gPiAgICAgX192ZnNfd3JpdGUrMHgyMC8w eDQ4Cj4gPiA+ICAgICB2ZnNfd3JpdGUrMHhlNC8weDFkMAo+ID4gPiAgICAga3N5c193cml0ZSsw eDcwLzB4ZjgKPiA+ID4gICAgIF9fYXJtNjRfc3lzX3dyaXRlKzB4MjAvMHgyOAo+ID4gPiAgICAg ZWwwX3N2Y19jb21tb24uY29uc3Rwcm9wLjArMHg3Yy8weDFjMAo+ID4gPiAgICAgZWwwX3N2Y19o YW5kbGVyKzB4MmMvMHhhMAo+ID4gPiAgICAgZWwwX3N2YysweDgvMHgyMDAKPiA+ID4gCj4gPiA+ IGVtdWxhdGlvbl9wcm9jX2hhbmRsZXIgY2hhbmdlcyB0YWJsZS0+ZGF0YSBmb3IgcHJvY19kb2lu dHZlY19taW5tYXgKPiA+ID4gYW5kIHNvIGl0IGlzbid0IGFsbG93ZWQgdG8gcmVlbnRlciBiZWZv cmUgcmVzdG9yaW5nIHRhYmxlLT5kYXRhLAo+ID4gPiB3aGljaCBpc24ndCByaWdodCBub3cuCj4g PiA+IFRvIGZpeCB0aGlzIGlzc3VlLCBrZWVwIHRoZSB0YWJsZS0+ZGF0YSBhcyAmaW5zbi0+Y3Vy cmVudF9tb2RlIGFuZAo+ID4gPiB1c2UgY29udGFpbmVyX29mKCkgdG8gcmV0cmlldmUgdGhlIGlu c24gcG9pbnRlci4gQW5vdGhlciBtdXRleCBpcwo+ID4gPiB1c2VkIHRvIHByb3RlY3QgYWdhaW5z dCB0aGUgY3VycmVudF9tb2RlIHVwZGF0ZSBidXQgbm90IGZvciByZXRyaWV2aW5nCj4gPiA+IGlu c25fZW11bGF0aW9uIGFzIHRhYmxlLT5kYXRhIGlzIG5vIGxvbmdlciBjaGFuZ2luZy4KPiA+IAo+ ID4gTG9va3MgYXMgdGhvdWdoIHRoaXMgbG9zdCBpdHMgRml4ZXMgdGFnIGR1cmluZyB0aGUgcmV3 b3JrLgo+ID4gCj4gPiAgIEZpeGVzOiA1ODcwNjRiNjEwYzcgKCJhcm02NDogQWRkIGZyYW1ld29y ayBmb3IgbGVnYWN5IGluc3RydWN0aW9uIGVtdWxhdGlvbiIpCj4gPiAKPiA+IFdpbGwsIGFyZSB5 b3UgYWJsZSB0byBhZGQgdGhpcyByZXRyb2FjdGl2ZWx5Pwo+IAo+IFNhZGx5LCB0aGlzIGlzIG5v dyBidXJpZWQgdW5kZXIgc29tZSBvdGhlciBwYXRjaGVzIHNvIEknZCBoYXZlIHRvIHJlYmFzZSB0 aGUKPiBicmFuY2ggaWYgSSB3ZXJlIHRvIGFkZCB0aGlzIGFuZCBJIGRvbid0IHRoaW5rIGl0J3Mg d29ydGggaXQganVzdCB0byBhZGQgYQo+IHRhZy4KCk5vIHdvcnJpZXMuICBKdXN0IHRob3VnaHQg SSdkIGFzay4KCj4gT24gdGhlIHBsdXMgc2lkZSwgdGhlIHBhdGNoIGhhcyBhIExpbms6IHRhZyB0 byB0aGlzIHRocmVhZCwgc28gdGhlCj4gRml4ZXMgdGFnIGlzIHJldHJpZXZhYmxlIGlmIHlvdSdy ZSBkZXRlcm1pbmVkIGVub3VnaC4KPiAKPiBJZiBzb21lYm9keSB3YW50cyB0aGlzIGZvciBzdGFi bGUsIHRoZW4gSSBzdXBwb3NlIHRoZXknbGwgaGF2ZSB0byBzZW5kCj4gYSBiYWNrcG9ydCB0byBt YWtlIHN1cmUgaXQgZG9lc24ndCBnZXQgbWlzc2VkLgoKSSdsbCBhZGQgaXQgdG8gbXkgVE9ETy4K Ci0tIApMZWUgSm9uZXMgW+adjueQvOaWr10KUHJpbmNpcGFsIFRlY2huaWNhbCBMZWFkIC0gRGV2 ZWxvcGVyIFNlcnZpY2VzCkxpbmFyby5vcmcg4pSCIE9wZW4gc291cmNlIHNvZnR3YXJlIGZvciBB cm0gU29DcwpGb2xsb3cgTGluYXJvOiBGYWNlYm9vayB8IFR3aXR0ZXIgfCBCbG9nCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVs IG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDov L2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==