From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Chen <wei.chen@arm.com>
Subject: Re: [for-4.7 2/2] xen/arm: p2m: Release the p2m lock
 before undoing the mappings
Date: Tue, 17 May 2016 14:21:42 +0800
Message-ID: <adf863c7-7add-d750-726f-c5b995ae9b6a@arm.com>
References: <1463407735-7409-1-git-send-email-julien.grall@arm.com>
 <1463407735-7409-3-git-send-email-julien.grall@arm.com>
 <45f975ea-e916-4066-03b7-8fac4225bda7@arm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <45f975ea-e916-4066-03b7-8fac4225bda7@arm.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Julien Grall <julien.grall@arm.com>, xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.liu2@citrix.com
List-Id: xen-devel@lists.xenproject.org

SGkgSnVsaWVuLAoKSSBoYXZlIHNvbWUgY29uY2VybiBhYm91dCB0aGlzIHBhdGNoLiBCZWNhdXNl
IHdlIHJlbGVhc2VkIHRoZSBzcGlubG9jawpiZWZvcmUgcmVtb3ZlIHRoZSBtYXBwZWQgbWVtb3J5
LiBJZiBzb21lYm9keSBhY3F1aXJlcyB0aGUgc3BpbmxvY2sKYmVmb3JlIHdlIHJlbW92ZSB0aGUg
bWFwcGVkIG1lbW9yeSwgdGhpcyBtYXBwZWQgbWVtb3J5IHJlZ2lvbiBjYW4gYmUKYWNjZXNzZWQg
YnkgZ3Vlc3QuCgpUaGUgYXBwbHlfcDJtX2NoYW5nZXMgaXMgbm8gbG9uZ2VyIGF0b21pYy4gSXMg
aXQgYSBzZWN1cml0eSByaXNrPwoKT24gMjAxNi81LzE3IDEzOjQ1LCBXZWkgQ2hlbiB3cm90ZToK
PiBIaSBKdWxpZW4sCj4KPiBUaGlzIGNvZGUgbG9va3MgZ29vZCB0byBtZSwgYW5kIEkgaGF2ZSB0
ZXN0ZWQgdGhhdAo+IHRoZSBkZWFkbG9jayBpcyBmaXhlZCBieSB0aGlzIHBhdGNoLgo+Cj4gUmV2
aWV3ZWQtYW5kLVRlc3RlZC1ieTogV2VpIENoZW4gPFdlaS5DaGVuQGFybS5jb20+Cj4KPiBPcmln
aW5hbDoKPiAoWEVOKSBzbW11OiAvc21iL3NtbXVAZTA4MDAwMDA6IFAyTSBJUEEgc2l6ZSBub3Qg
c3VwcG9ydGVkIChQMk09NDQKPiBTTU1VPTQwKSEKPiAoWEVOKSBJL08gdmlydHVhbGlzYXRpb24g
ZGlzYWJsZWQKPiAoWEVOKSBSZXF1ZXN0IHAybSBTcGlubG9jay4uLgo+IChYRU4pIFJlcXVlc3Qg
cDJtIFNwaW5sb2NrLi4uT0sKPiAoWEVOKSBhcHBseV9wMm1fY2hhbmdlcyBmYWlsZWQhIHJvbGxi
YWNrISBjYWxsIGFwcGx5X3AybV9jaGFuZ2VzCj4gcmVjdXJzaXZlbHkhCj4gKFhFTikgUmVxdWVz
dCBwMm0gU3BpbmxvY2suLi4KPgo+IFBhdGNoZWQ6Cj4gKFhFTikgc21tdTogL3NtYi9zbW11QGUw
ODAwMDAwOiBQMk0gSVBBIHNpemUgbm90IHN1cHBvcnRlZCAoUDJNPTQ0Cj4gU01NVT00MCkhCj4g
KFhFTikgSS9PIHZpcnR1YWxpc2F0aW9uIGRpc2FibGVkCj4gKFhFTikgUmVxdWVzdCBwMm0gU3Bp
bmxvY2suLi4KPiAoWEVOKSBSZXF1ZXN0IHAybSBTcGlubG9jay4uLk9LCj4gKFhFTikgYXBwbHlf
cDJtX2NoYW5nZXMgZmFpbGVkISByb2xsYmFjayEgY2FsbCBhcHBseV9wMm1fY2hhbmdlcwo+IHJl
Y3Vyc2l2ZWx5IQo+IChYRU4pIFJlcXVlc3QgcDJtIFNwaW5sb2NrLi4uCj4gKFhFTikgUmVxdWVz
dCBwMm0gU3BpbmxvY2suLi5PSwo+Cj4KPiBPbiAyMDE2LzUvMTYgMjI6MDgsIEp1bGllbiBHcmFs
bCB3cm90ZToKPj4gU2luY2UgY29tbWl0IDRiMjU0MjNhICJhcmNoL2FybTogdW5tYXAgcGFydGlh
bGx5LW1hcHBlZCBtZW1vcnkgcmVnaW9ucyIsCj4+IFhlbiBoYXMgYmVlbiB1bmRvaW5nIHRoZSBQ
Mk0gbWFwcGluZ3Mgd2hlbiBhbiBlcnJvciBvY2N1cnJlZCBkdXJpbmcKPj4gaW5zZXJ0aW9uIG9y
IG1lbW9yeSBhbGxvY2F0aW9uLgo+Pgo+PiBUaGlzIGlzIGRvbmUgYnkgY2FsbGluZyByZWN1cnNp
dmVseSBhcHBseV9wMm1fY2hhbmdlcywgaG93ZXZlciB0aGUKPj4gc2Vjb25kIGNhbGwgaXMgZG9u
ZSB3aXRoIHRoZSBwMm0gbG9jayB0YWtlbiB3aGljaCB3aWxsIHJlc3VsdCBpbiBhCj4+IGRlYWRs
b2NrIGZvciB0aGUgY3VycmVudCBwcm9jZXNzb3IuCj4+Cj4+IEZpeCBpdCBieSBtb3ZpbmcgdGhl
IHJlY3Vyc2l2ZSBjYWxsIGFmdGVyIHRoZSBsb2NrIGhhcyBiZWVuIHJlbGVhc2VkLgo+Pgo+PiBT
aWduZWQtb2ZmLWJ5OiBKdWxpZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBhcm0uY29tPgo+Pgo+PiAt
LS0KPj4gICAgIEkgdGhpbmsgd2UgY291bGQgdW5sb2NrIHRoZSBwMm0gbG9jayBiZWZvcmUgZnJl
ZWluZyB0aGUgdGVtcG9yYXJ5Cj4+ICAgICBtYXBwaW5nLiBBbHRob3VnaCwgSSBwbGF5ZWQgc2Fm
ZSBhcyB0aGlzIGlzIGEgYnVnIGZpeCBmb3IgWGVuIDQuNwo+PiAgICAgYW5kIHRvIGJlIGJhY2tw
b3J0ZWQgdXAgdG8gWGVuIDQuNS4KPj4gLS0tCj4+ICB4ZW4vYXJjaC9hcm0vcDJtLmMgfCAxNiAr
KysrKysrKy0tLS0tLS0tCj4+ICAxIGZpbGUgY2hhbmdlZCwgOCBpbnNlcnRpb25zKCspLCA4IGRl
bGV0aW9ucygtKQo+Pgo+PiBkaWZmIC0tZ2l0IGEveGVuL2FyY2gvYXJtL3AybS5jIGIveGVuL2Fy
Y2gvYXJtL3AybS5jCj4+IGluZGV4IDY4YzY3YjAuLjgzOGQwMDQgMTAwNjQ0Cj4+IC0tLSBhL3hl
bi9hcmNoL2FybS9wMm0uYwo+PiArKysgYi94ZW4vYXJjaC9hcm0vcDJtLmMKPj4gQEAgLTExODQs
NiArMTE4NCwxNCBAQCBvdXQ6Cj4+ICAgICAgd2hpbGUgKCAocGcgPSBwYWdlX2xpc3RfcmVtb3Zl
X2hlYWQoJmZyZWVfcGFnZXMpKSApCj4+ICAgICAgICAgIGZyZWVfZG9taGVhcF9wYWdlKHBnKTsK
Pj4KPj4gKyAgICBmb3IgKCBsZXZlbCA9IFAyTV9ST09UX0xFVkVMOyBsZXZlbCA8IDQ7IGxldmVs
ICsrICkKPj4gKyAgICB7Cj4+ICsgICAgICAgIGlmICggbWFwcGluZ3NbbGV2ZWxdICkKPj4gKyAg
ICAgICAgICAgIHVubWFwX2RvbWFpbl9wYWdlKG1hcHBpbmdzW2xldmVsXSk7Cj4+ICsgICAgfQo+
PiArCj4+ICsgICAgc3Bpbl91bmxvY2soJnAybS0+bG9jayk7Cj4+ICsKPj4gICAgICBpZiAoIHJj
IDwgMCAmJiAoIG9wID09IElOU0VSVCB8fCBvcCA9PSBBTExPQ0FURSApICYmCj4+ICAgICAgICAg
ICBhZGRyICE9IHN0YXJ0X2dwYWRkciApCj4+ICAgICAgewo+PiBAQCAtMTE5NiwxNCArMTIwNCw2
IEBAIG91dDoKPj4gICAgICAgICAgICAgICAgICAgICAgICAgICAgbWF0dHIsIDAsIHAybV9pbnZh
bGlkLAo+PiBkLT5hcmNoLnAybS5kZWZhdWx0X2FjY2Vzcyk7Cj4+ICAgICAgfQo+Pgo+PiAtICAg
IGZvciAoIGxldmVsID0gUDJNX1JPT1RfTEVWRUw7IGxldmVsIDwgNDsgbGV2ZWwgKysgKQo+PiAt
ICAgIHsKPj4gLSAgICAgICAgaWYgKCBtYXBwaW5nc1tsZXZlbF0gKQo+PiAtICAgICAgICAgICAg
dW5tYXBfZG9tYWluX3BhZ2UobWFwcGluZ3NbbGV2ZWxdKTsKPj4gLSAgICB9Cj4+IC0KPj4gLSAg
ICBzcGluX3VubG9jaygmcDJtLT5sb2NrKTsKPj4gLQo+PiAgICAgIHJldHVybiByYzsKPj4gIH0K
Pj4KPj4KSU1QT1JUQU5UIE5PVElDRTogVGhlIGNvbnRlbnRzIG9mIHRoaXMgZW1haWwgYW5kIGFu
eSBhdHRhY2htZW50cyBhcmUgY29uZmlkZW50aWFsIGFuZCBtYXkgYWxzbyBiZSBwcml2aWxlZ2Vk
LiBJZiB5b3UgYXJlIG5vdCB0aGUgaW50ZW5kZWQgcmVjaXBpZW50LCBwbGVhc2Ugbm90aWZ5IHRo
ZSBzZW5kZXIgaW1tZWRpYXRlbHkgYW5kIGRvIG5vdCBkaXNjbG9zZSB0aGUgY29udGVudHMgdG8g
YW55IG90aGVyIHBlcnNvbiwgdXNlIGl0IGZvciBhbnkgcHVycG9zZSwgb3Igc3RvcmUgb3IgY29w
eSB0aGUgaW5mb3JtYXRpb24gaW4gYW55IG1lZGl1bS4gVGhhbmsgeW91LgoKCl9fX19fX19fX19f
X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxp
c3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVs
Cg==