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([2001:df0:0:200c:112f:75e9:7ff2:6774]) by smtp.gmail.com with ESMTPSA id j8-20020a62b608000000b005ded4825201sm6382146pff.112.2023.02.28.11.19.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 28 Feb 2023 11:19:07 -0800 (PST) Message-ID: Date: Wed, 1 Mar 2023 08:18:59 +1300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [PATCH 08/10] parisc: fix livelock in uaccess Content-Language: en-US To: Guenter Roeck , Al Viro Cc: linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Michal Simek , Dinh Nguyen , openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, sparclinux@vger.kernel.org, Linus Torvalds References: <20230228152236.GA4088022@roeck-us.net> From: Michael Schmitz In-Reply-To: <20230228152236.GA4088022@roeck-us.net> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230228_111911_499581_525D8B7D X-CRM114-Status: GOOD ( 17.75 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org R3VlbnRlciwKCk9uIDEvMDMvMjMgMDQ6MjIsIEd1ZW50ZXIgUm9lY2sgd3JvdGU6Cj4gT24gVHVl LCBKYW4gMzEsIDIwMjMgYXQgMDg6MDY6MjdQTSArMDAwMCwgQWwgVmlybyB3cm90ZToKPj4gcGFy aXNjIGVxdWl2YWxlbnQgb2YgMjYxNzhlYzExZWYzICJ4ODY6IG1tOiBjb25zb2xpZGF0ZSBWTV9G QVVMVF9SRVRSWSBoYW5kbGluZyIKPj4gSWYgZS5nLiBnZXRfdXNlcigpIHRyaWdnZXJzIGEgcGFn ZSBmYXVsdCBhbmQgYSBmYXRhbCBzaWduYWwgaXMgY2F1Z2h0LCB3ZSBtaWdodAo+PiBlbmQgdXAg d2l0aCBoYW5kbGVfbW1fZmF1bHQoKSByZXR1cm5pbmcgVk1fRkFVTFRfUkVUUlkgYW5kIG5vdCBk b2luZyBhbnl0aGluZwo+PiB0byBwYWdlIHRhYmxlcy4gIEluIHN1Y2ggY2FzZSB3ZSBtdXN0ICpu b3QqIHJldHVybiB0byB0aGUgZmF1bHRpbmcgaW5zbiAtCj4+IHRoYXQgd291bGQgcmVwZWF0IHRo ZSBlbnRpcmUgdGhpbmcgd2l0aG91dCBtYWtpbmcgYW55IHByb2dyZXNzOyB3aGF0IHdlIG5lZWQK Pj4gaW5zdGVhZCBpcyB0byB0cmVhdCB0aGF0IGFzIGZhaWxlZCAodXNlcikgbWVtb3J5IGFjY2Vz cy4KPj4KPj4gU2lnbmVkLW9mZi1ieTogQWwgVmlybyA8dmlyb0B6ZW5pdi5saW51eC5vcmcudWs+ Cj4+IC0tLQo+PiAgIGFyY2gvcGFyaXNjL21tL2ZhdWx0LmMgfCA1ICsrKystCj4+ICAgMSBmaWxl IGNoYW5nZWQsIDQgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQo+Pgo+PiBkaWZmIC0tZ2l0 IGEvYXJjaC9wYXJpc2MvbW0vZmF1bHQuYyBiL2FyY2gvcGFyaXNjL21tL2ZhdWx0LmMKPj4gaW5k ZXggODY5MjA0ZTk3ZWM5Li5iYjMwZmY2YTNlMTkgMTAwNjQ0Cj4+IC0tLSBhL2FyY2gvcGFyaXNj L21tL2ZhdWx0LmMKPj4gKysrIGIvYXJjaC9wYXJpc2MvbW0vZmF1bHQuYwo+PiBAQCAtMzA4LDgg KzMwOCwxMSBAQCB2b2lkIGRvX3BhZ2VfZmF1bHQoc3RydWN0IHB0X3JlZ3MgKnJlZ3MsIHVuc2ln bmVkIGxvbmcgY29kZSwKPj4gICAKPj4gICAJZmF1bHQgPSBoYW5kbGVfbW1fZmF1bHQodm1hLCBh ZGRyZXNzLCBmbGFncywgcmVncyk7Cj4+ICAgCj4+IC0JaWYgKGZhdWx0X3NpZ25hbF9wZW5kaW5n KGZhdWx0LCByZWdzKSkKPj4gKwlpZiAoZmF1bHRfc2lnbmFsX3BlbmRpbmcoZmF1bHQsIHJlZ3Mp KSB7Cj4+ICsJCWlmICghdXNlcl9tb2RlKHJlZ3MpKQo+PiArCQkJZ290byBub19jb250ZXh0Owo+ IDAtZGF5IHJpZ2h0ZnVsbHkgY29tcGxhaW5zIHRoYXQgdGhpcyBsZWF2ZXMgJ21zZycgdW5pbml0 aWFsaXplZC4KPgo+IGFyY2gvcGFyaXNjL21tL2ZhdWx0LmM6NDI3IGRvX3BhZ2VfZmF1bHQoKSBl cnJvcjogdW5pbml0aWFsaXplZCBzeW1ib2wgJ21zZycKPgo+IEd1ZW50ZXIKCldoYXQgaGFwcGVu cyBpZiB5b3UgaW5pdGlhbGl6ZSBtc2cgdG8gIlBhZ2UgZmF1bHQ6IG5vIGNvbnRleHQiIHJpZ2h0 IGF0IAp0aGUgc3RhcnQgb2YgZG9fcGFnZV9mYXVsdCAoYW5kIGRyb3AgdGhlIGFzc2lnbm1lbnQg YSBmZXcgbGluZXMgZG93biBhcyAKdGhhdCdzIG5vdyByZWR1bmRhbnQpPwoKKFdvbmRlcmluZyBp ZiB0aGUgemVybyBwYWdlIGFjY2VzcyBvbiBwYXJpc2MgY291bGQgY2F1c2UgYSB0cmlwIHJpZ2h0 IApiYWNrIGludG8gZG9fcGFnZV9mYXVsdCwgYWQgaW5maW5pdHVtLi4uKQoKQ2hlZXJzLAoKIMKg wqDCoCBNaWNoYWVsCgoKPj4gICAJCXJldHVybjsKPj4gKwl9Cj4+ICAgCj4+ICAgCS8qIFRoZSBm YXVsdCBpcyBmdWxseSBjb21wbGV0ZWQgKGluY2x1ZGluZyByZWxlYXNpbmcgbW1hcCBsb2NrKSAq Lwo+PiAgIAlpZiAoZmF1bHQgJiBWTV9GQVVMVF9DT01QTEVURUQpCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QK bGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==