From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shannon Zhao Subject: Re: [PATCH] arm/acpi: Fix the deadlock in function vgic_lock_rank() Date: Tue, 31 May 2016 08:55:10 +0800 Message-ID: <574CE0EE.1060600@huawei.com> References: <1464309582-22637-1-git-send-email-shankerd@codeaurora.org> <57485203.3030407@arm.com> <1918c496-c33d-bed4-feec-b8b4f6dd404b@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1918c496-c33d-bed4-feec-b8b4f6dd404b@arm.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall , Stefano Stabellini Cc: xen-devel , Wei Liu , Wei Chen , Vikram Sethi , Steve Capper , Philip Elcan , Shannon Zhao , Shanker Donthineni List-Id: xen-devel@lists.xenproject.org CgpPbiAyMDE2LzUvMzEgMzo0NSwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IChDQyBXZWkgTGl1KQo+ IAo+IEhpIFN0ZWZhbm8sCj4gCj4gT24gMzAvMDUvMjAxNiAxNDoxNiwgU3RlZmFubyBTdGFiZWxs aW5pIHdyb3RlOgo+PiBPbiBGcmksIDI3IE1heSAyMDE2LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4+ PiBIZWxsbyBTaGFua2VyLAo+Pj4KPj4+IE9uIDI3LzA1LzE2IDAxOjM5LCBTaGFua2VyIERvbnRo aW5lbmkgd3JvdGU6Cj4+Pj4gQ29tbWl0IDlkNzdiM2MwMWQxMjYxYyAoQ29uZmlndXJlIFNQSSBp bnRlcnJ1cHQgdHlwZSBhbmQgcm91dGUgdG8KPj4+PiBEb20wIGR5bmFtaWNhbGx5KSBjYXVzaW5n IGRlYWQgbG9vcCBpbnNpZGUgdGhlIHNwaW5sb2NrIGZ1bmN0aW9uLgo+Pj4+IE5vdGUgdGhhdCBz cGlubG9ja3MgaW4gWEVOIGFyZSBub3QgcmVjdXJzaXZlLiBSZS1hY3F1aXJpbmcgYSBzcGlubG9j awo+Pj4+IHRoYXQgaGFzIGFscmVhZHkgaGVsZCBieSBjYWxsaW5nIENQVSBsZWFkcyB0byBkZWFk bG9jay4gVGhpcyBoYXBwZW5zCj4+Pj4gd2hlbmV2ZXIgZG9tMCBkb2VzIHdyaXRlcyB0byBHSUNE IHJlZ3MgSVNFTkFCTEVSL0lDRU5BQkxFUi4KPj4+Cj4+PiBUaGFuayB5b3UgZm9yIHNwb3R0aW5n IGl0LCBJIGhhdmUgbm90IG5vdGljZWQgaXQgd2hpbGUgSSB3YXMgCj4+PiByZXZpZXdpbmcsIG9u bHkKPj4+IHRlc3RlZCBvbiBhIG1vZGVsIHdpdGhvdXQgYW55IFNQSXMuCj4+Pgo+Pj4+IFRoZSBm b2xsb3dpbmcgY2FsbCB0cmFjZSBleHBsYWlucyB0aGUgcHJvYmxlbS4KPj4+Pgo+Pj4+IERPTTAg d3JpdGVzIEdJQ0RfSVNFTkFCTEVSL0dJQ0RfSUNFTkFCTEVSCj4+Pj4gICAgdmdpY192M19kaXN0 cl9jb21tb25fbW1pb193cml0ZSgpCj4+Pj4gICAgICB2Z2ljX2xvY2tfcmFuaygpICAtLT4gIGFj cXVpcmluZyBmaXJzdCB0aW1lCj4+Pj4gICAgICAgIHZnaWNfZW5hYmxlX2lycXMoKQo+Pj4+ICAg ICAgICAgIHJvdXRlX2lycV90b19ndWVzdCgpCj4+Pj4gICAgICAgICAgICBnaWNfcm91dGVfaXJx X3RvX2d1ZXN0KCkKPj4+PiAgICAgICAgICAgICAgdmdpY19nZXRfdGFyZ2V0X3ZjcHUoKQo+Pj4+ ICAgICAgICAgICAgICAgIHZnaWNfbG9ja19yYW5rKCkgIC0tPiAgYXR0ZW1waW5nIGFjcXVpcmVk IGxvY2sKPj4+Pgo+Pj4+IFRoZSBzaW1wbGUgZml4IHJlbGVhc2Ugc3BpbmxvY2sgYmVmb3JlIGNh bGxpbmcgdmdpY19lbmFibGVfaXJxcygpCj4+Pj4gYW5kIHZnaWNfZGlzYWJsZV9pcnFzKCkuCj4+ Pgo+Pj4gWW91IHNob3VsZCBleHBsYWluIHdoeSB5b3UgdGhpbmsgaXQgaXMgdmFsaWQgdG8gcmVs ZWFzZSB0aGUgbG9jawo+Pj4gZWFybGllci4KPj4+Cj4+PiBJbiB0aGlzIGNhc2UsIEkgdGhpbmsg dGhlIGZpeCBpcyBub3QgY29ycmVjdCBiZWNhdXNlIHRoZSBsb2NrIGlzCj4+PiBwcm90ZWN0aW5n Cj4+PiBib3RoIHRoZSByZWdpc3RlciB2YWx1ZSBhbmQgdGhlIGludGVybmFsIHN0YXRlIGluIFhl biAobW9kaWZpZWQgYnkKPj4+IHZnaWNfZW5hYmxlX2lycXMpLiBCeSByZWxlYXNpbmcgdGhlIGxv Y2sgZWFybGllciwgdGhleSBtYXkgYmVjb21lCj4+PiBpbmNvbnNpc3RlbnQKPj4+IGlmIGFub3Ro ZXIgdkNQVSBpcyBkaXNhYmxpbmcgdGhlIElSUXMgYXQgdGhlIHNhbWUgdGltZS4KPj4KPj4gSSBh Z3JlZSwgdGhlIHZnaWNfZW5hYmxlX2lycXMgY2FsbCBuZWVkIHRvIHN0YXkgd2l0aGluIHRoZQo+ PiB2Z2ljX2xvY2tfcmFuay92Z2ljX3VubG9ja19yYW5rIHJlZ2lvbi4KPj4KPj4KPj4+IEkgY2Fu bm90IGZpbmQgYW4gZWFzeSBmaXggd2hpY2ggZG9lcyBub3QgaW52b2x2ZSByZWxlYXNlIHRoZSBs b2NrLgo+Pj4gV2hlbiBJIHdhcwo+Pj4gcmV2aWV3aW5nIHRoaXMgcGF0Y2gsIEkgc3VnZ2VzdGVk IHRvIHNwbGl0IHRoZSBJUlEgY29uZmlndXJhdGlvbiBmcm9tCj4+PiB0aGUKPj4+IHJvdXRpbmcu Cj4+Cj4+IFllcywgdGhlIHJvdXRpbmcgZG9lc24ndCBuZWVkIHRvIGJlIGRvbmUgZnJvbSB2Z2lj X2VuYWJsZV9pcnFzLiBJdCBpcwo+PiBub3QgbmljZS4gVGhhdCB3b3VsZCBiZSB0aGUgaWRlYWwg Zml4LCBidXQgaXQgaXMgbm90IHRyaXZpYWwuCj4+Cj4+IEZvciA0Ljcgd2UgY291bGQgY29uc2lk ZXIgcmV2ZXJ0aW5nIDlkNzdiM2MwMWQxMjYxYy4gVGhlIG9ubHkgb3RoZXIKPj4gdGhpbmcgdGhh dCBJIGNhbiBjb21lIHVwIHdpdGggd2hpY2ggaXMgc2ltcGxlIHdvdWxkIGJlIGltcHJvdmluZwo+ PiBnaWNfcm91dGVfaXJxX3RvX2d1ZXN0IHRvIGNvcGUgd2l0aCBjYWxsZXJzIHRoYXQgaGF2ZSB0 aGUgdmdpYyByYW5rIGxvY2sKPj4gYWxyZWFkeSBoZWxkIChzZWUgYmVsb3csIHVudGVzdGVkKSBi dXQgaXQncyBwcmV0dHkgdWdseS4KPiAKPiBXZSBhcmUgY2xvc2UgdG8gcmVsZWFzZSBYZW4gNC43 LCBzbyBJIHRoaW5rIHdlIHNob3VsZCBhdm9pZCB0byB0b3VjaCB0aGUKPiBjb21tb24gaW50ZXJy dXB0IGNvZGUgKGkuZSBub3Qgb25seSB1c2VkIGJ5IEFDUEkpLgo+IAo+IEFDUEkgY2FuIG9ubHkg YmUgZW5hYmxlZCBpbiBleHBlcnQgbW9kZSBhbmQgd2lsbCBiZSBhIHRlY2gtcHJldmlldyBmb3IK PiBYZW4gNC43LiBTbyBJIHdvdWxkIHJldmVydCB0aGUgcGF0Y2guICBTUElzIHdpbGwgbm90IGJl IHJvdXRlZCwgYnV0IGl0Cj4gaXMgYmV0dGVyIHRoYW4gYSBkZWFkbG9jay4KPiAKPiBJIHdvdWxk IGFsc28gcmVwbGFjZSB0aGUgcGF0Y2ggd2l0aCBhIHdhcm5pbmcgdW50aWwgdGhlIGlzc3VlIHdp bGwgYmUKPiBmaXhlZCBpbiBYZW4gNC44Lgo+IAo+IEFueSBvcGluaW9ucz8KCkkgYWdyZWUgYW5k IEknbSBzbyBzb3JyeSBmb3IgdGhpcyBwcm9ibGVtLgoKVGhhbmtzLAotLSAKU2hhbm5vbgoKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBt YWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcv eGVuLWRldmVsCg==