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Tsirkin" To: Bo Liu =?utf-8?B?KOWImOazoikt5rWq5r2u5L+h5oGv?= Subject: Re: [PATCH] virtio_ring: remove unnecessary to_vvq() call Message-ID: <20220928000342-mutt-send-email-mst@kernel.org> References: <4366e621c74e46bfa642d6802187ad44@inspur.com> MIME-Version: 1.0 In-Reply-To: <4366e621c74e46bfa642d6802187ad44@inspur.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Cc: "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" T24gV2VkLCBTZXAgMjgsIDIwMjIgYXQgMDI6MjY6MTZBTSArMDAwMCwgQm8gTGl1ICjliJjms6Ip Lea1qua9ruS/oeaBryB3cm90ZToKPiA+T24gTW9uLCBTZXAgMjYsIDIwMjIgYXQgMDU6MTE6MzBB TSAtMDQwMCwgQm8gTGl1IHdyb3RlOgo+ID4+IEl0IHBhc3NlcyAnX3ZxJyB0byB2cmluZ19mcmVl KCksIHdoaWNoIHN0aWxsIGNhbGxzIHRvX3Z2cSgpIHRvIGdldAo+ID4+ICd2cScsIGxldCdzIGRp cmVjdGx5IHBhc3MgJ3ZxJy4gSXQgY2FuIGF2b2lkIHVubmVjZXNzYXJ5IGNhbGwgb2YKPiA+PiB0 b192dnEoKSBpbiBob3QgcGF0aC4KPiA+Pgo+ID4+IFNpZ25lZC1vZmYtYnk6IEJvIExpdSA8bGl1 Ym8wM0BpbnNwdXIuY29tPgo+ID4KPiA+V2hhdCBpcyB0aGUgcG9pbnQgb2YgdGhpcyBjaGFuZ2U/ Cj4gPgo+ID5fX3ZyaW5nX25ld192aXJ0cXVldWUgcmV0dXJucyBzdHJ1Y3QgdmlydHF1ZXVlICos IHNvIHZyaW5nX2ZyZWUgbWF0Y2hlcwo+IHRoYXQuCj4gPk5vPwo+ID4KPiAKPiBIaQo+IEluIGZ1 bmN0aW9uIHZyaW5nX2ZyZWUoKSwgdG9fdnZxKCkganMgdW5uZWNlc3NhcnksIHdlIGNhbiBkaXJl Y3RseSBwYXNzCj4gc3RydWN0IHZyaW5nX3ZpcnRxdWV1ZSAqIHRvIGF2b2lkIHRoaXMgYW5kIHJl bW92ZSB0aGUgdW5uZWNlc3NhcnkgY29kZS4KCkFuZCBzbz8gSXMgdGhlIHJlc3VsdGluZyBiaW5h cnkgc21hbGxlcj8KCj4gPj4gLS0tCj4gPj4gIGRyaXZlcnMvdmlydGlvL3ZpcnRpb19yaW5nLmMg fCAxMiArKysrKy0tLS0tLS0KPiA+PiAgMSBmaWxlIGNoYW5nZWQsIDUgaW5zZXJ0aW9ucygrKSwg NyBkZWxldGlvbnMoLSkKPiA+Pgo+ID4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL3ZpcnRpby92aXJ0 aW9fcmluZy5jCj4gPj4gYi9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fcmluZy5jIGluZGV4IDg5NzRj MzRiNDBmZC4uZDZkNzdiZjU4ODAyIDEwMDY0NAo+ID4+IC0tLSBhL2RyaXZlcnMvdmlydGlvL3Zp cnRpb19yaW5nLmMKPiA+PiArKysgYi9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fcmluZy5jCj4gPj4g QEAgLTIyMSw3ICsyMjEsNyBAQCBzdGF0aWMgc3RydWN0IHZpcnRxdWV1ZQo+ID4qX192cmluZ19u ZXdfdmlydHF1ZXVlKHVuc2lnbmVkIGludCBpbmRleCwKPiA+PiAgCQkJCQkgICAgICAgdm9pZCAo KmNhbGxiYWNrKShzdHJ1Y3QKPiB2aXJ0cXVldWUgKiksCj4gPj4gIAkJCQkJICAgICAgIGNvbnN0 IGNoYXIgKm5hbWUpOwo+ID4+ICBzdGF0aWMgc3RydWN0IHZyaW5nX2Rlc2NfZXh0cmEgKnZyaW5n X2FsbG9jX2Rlc2NfZXh0cmEodW5zaWduZWQgaW50Cj4gPj4gbnVtKTsgLXN0YXRpYyB2b2lkIHZy aW5nX2ZyZWUoc3RydWN0IHZpcnRxdWV1ZSAqX3ZxKTsKPiA+PiArc3RhdGljIHZvaWQgdnJpbmdf ZnJlZShzdHJ1Y3QgdnJpbmdfdmlydHF1ZXVlICp2cSk7Cj4gPj4KPiA+PiAgLyoKPiA+PiAgICog SGVscGVycy4KPiA+PiBAQCAtMTE0MCw3ICsxMTQwLDcgQEAgc3RhdGljIGludCB2aXJ0cXVldWVf cmVzaXplX3NwbGl0KHN0cnVjdCB2aXJ0cXVldWUKPiA+Kl92cSwgdTMyIG51bSkKPiA+PiAgCWlm IChlcnIpCj4gPj4gIAkJZ290byBlcnJfc3RhdGVfZXh0cmE7Cj4gPj4KPiA+PiAtCXZyaW5nX2Zy ZWUoJnZxLT52cSk7Cj4gPj4gKwl2cmluZ19mcmVlKHZxKTsKPiA+Pgo+ID4+ICAJdmlydHF1ZXVl X3ZyaW5nX2luaXRfc3BsaXQoJnZyaW5nX3NwbGl0LCB2cSk7Cj4gPj4KPiA+PiBAQCAtMjA1OSw3 ICsyMDU5LDcgQEAgc3RhdGljIGludCB2aXJ0cXVldWVfcmVzaXplX3BhY2tlZChzdHJ1Y3Qgdmly dHF1ZXVlCj4gPipfdnEsIHUzMiBudW0pCj4gPj4gIAlpZiAoZXJyKQo+ID4+ICAJCWdvdG8gZXJy X3N0YXRlX2V4dHJhOwo+ID4+Cj4gPj4gLQl2cmluZ19mcmVlKCZ2cS0+dnEpOwo+ID4+ICsJdnJp bmdfZnJlZSh2cSk7Cj4gPj4KPiA+PiAgCXZpcnRxdWV1ZV92cmluZ19pbml0X3BhY2tlZCgmdnJp bmdfcGFja2VkLCAhIXZxLT52cS5jYWxsYmFjayk7Cj4gPj4KPiA+PiBAQCAtMjY0OSwxMCArMjY0 OSw4IEBAIHN0cnVjdCB2aXJ0cXVldWUgKnZyaW5nX25ld192aXJ0cXVldWUodW5zaWduZWQKPiA+ PiBpbnQgaW5kZXgsICB9ICBFWFBPUlRfU1lNQk9MX0dQTCh2cmluZ19uZXdfdmlydHF1ZXVlKTsK PiA+Pgo+ID4+IC1zdGF0aWMgdm9pZCB2cmluZ19mcmVlKHN0cnVjdCB2aXJ0cXVldWUgKl92cSkK PiA+PiArc3RhdGljIHZvaWQgdnJpbmdfZnJlZShzdHJ1Y3QgdnJpbmdfdmlydHF1ZXVlICp2cSkK PiA+PiAgewo+ID4+IC0Jc3RydWN0IHZyaW5nX3ZpcnRxdWV1ZSAqdnEgPSB0b192dnEoX3ZxKTsK PiA+PiAtCj4gPj4gIAlpZiAodnEtPndlX293bl9yaW5nKSB7Cj4gPj4gIAkJaWYgKHZxLT5wYWNr ZWRfcmluZykgewo+ID4+ICAJCQl2cmluZ19mcmVlX3F1ZXVlKHZxLT52cS52ZGV2LAo+ID4+IEBA IC0yNjkzLDcgKzI2OTEsNyBAQCB2b2lkIHZyaW5nX2RlbF92aXJ0cXVldWUoc3RydWN0IHZpcnRx dWV1ZSAqX3ZxKQo+ID4+ICAJbGlzdF9kZWwoJl92cS0+bGlzdCk7Cj4gPj4gIAlzcGluX3VubG9j aygmdnEtPnZxLnZkZXYtPnZxc19saXN0X2xvY2spOwo+ID4+Cj4gPj4gLQl2cmluZ19mcmVlKF92 cSk7Cj4gPj4gKwl2cmluZ19mcmVlKHZxKTsKPiA+Pgo+ID4+ICAJa2ZyZWUodnEpOwo+ID4+ICB9 Cj4gPj4gLS0KPiA+PiAyLjI3LjAKPiAKCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRp b25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRp b24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=