From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Brezillon Subject: Re: [PATCH] drm/vc4: Fix false positive WARN() backtrace on refcount_inc() usage Date: Thu, 7 Dec 2017 13:56:33 +0100 Message-ID: <20171207135633.7e51cfb2@bbrezillon> References: <20171122203928.28135-1-boris.brezillon@free-electrons.com> <8760a2ko9z.fsf@anholt.net> <20171122222850.075db871@bbrezillon> <87tvxlzwb8.fsf@anholt.net> <20171123092411.4bad889c@bbrezillon> <20171124145235.jopv2ctnczgrhqkj@phenom.ffwll.local> <7f6a6c8e-cc56-2958-ba5a-2c467efb1055@i2se.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail.free-electrons.com (mail.free-electrons.com [62.4.15.54]) by gabe.freedesktop.org (Postfix) with ESMTP id 4F8606E037 for ; Thu, 7 Dec 2017 12:56:35 +0000 (UTC) In-Reply-To: <7f6a6c8e-cc56-2958-ba5a-2c467efb1055@i2se.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Stefan Wahren Cc: David Airlie , dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org T24gVGh1LCA3IERlYyAyMDE3IDEzOjMxOjM0ICswMTAwClN0ZWZhbiBXYWhyZW4gPHN0ZWZhbi53 YWhyZW5AaTJzZS5jb20+IHdyb3RlOgoKPiBIaSBEYW5pZWwsCj4gCj4gCj4gQW0gMjQuMTEuMjAx NyB1bSAxNTo1MiBzY2hyaWViIERhbmllbCBWZXR0ZXI6Cj4gPiBPbiBUaHUsIE5vdiAyMywgMjAx NyBhdCAwOToyNDoxMUFNICswMTAwLCBCb3JpcyBCcmV6aWxsb24gd3JvdGU6ICAKPiA+PiBPbiBX ZWQsIDIyIE5vdiAyMDE3IDE2OjEzOjMxIC0wODAwCj4gPj4gRXJpYyBBbmhvbHQgPGVyaWNAYW5o b2x0Lm5ldD4gd3JvdGU6Cj4gPj4gIAo+ID4+PiBCb3JpcyBCcmV6aWxsb24gPGJvcmlzLmJyZXpp bGxvbkBmcmVlLWVsZWN0cm9ucy5jb20+IHdyaXRlczoKPiA+Pj4gIAo+ID4+Pj4gT24gV2VkLCAy MiBOb3YgMjAxNyAxMzoxNjowOCAtMDgwMAo+ID4+Pj4gRXJpYyBBbmhvbHQgPGVyaWNAYW5ob2x0 Lm5ldD4gd3JvdGU6Cj4gPj4+PiAgICAgCj4gPj4+Pj4gQm9yaXMgQnJlemlsbG9uIDxib3Jpcy5i cmV6aWxsb25AZnJlZS1lbGVjdHJvbnMuY29tPiB3cml0ZXM6Cj4gPj4+Pj4gICAgICAKPiA+Pj4+ Pj4gV2l0aCBDT05GSUdfUkVGQ09VTlRfRlVMTCBlbmFibGVkLCByZWZjb3VudF9pbmMoKSBjb21w bGFpbnMgd2hlbiBpdCdzCj4gPj4+Pj4+IHBhc3NlZCBhIHJlZmNvdW50IG9iamVjdCB0aGF0IGhh cyBpdHMgY291bnRlciBzZXQgdG8gMC4gSW4gdGhpcyBkcml2ZXIsCj4gPj4+Pj4+IHRoaXMgaXMg YSB2YWxpZCB1c2UgY2FzZSBzaW5jZSB3ZSB3YW50IHRvIGluY3JlbWVudCAtPnVzZWNudCBvbmx5 IHdoZW4KPiA+Pj4+Pj4gdGhlIEJPIG9iamVjdCBzdGFydHMgdG8gYmUgdXNlZCBieSByZWFsIEhX IGNvbXBvbmVudHMgYW5kIHRoaXMgaXMKPiA+Pj4+Pj4gZGVmaW5pdGVseSBub3QgdGhlIGNhc2Ug d2hlbiB0aGUgQk8gaXMgY3JlYXRlZC4KPiA+Pj4+Pj4KPiA+Pj4+Pj4gRml4IHRoZSBwcm9ibGVt IGJ5IHVzaW5nIHJlZmNvdW50X2luY19ub3RfemVybygpIGluc3RlYWQgb2YKPiA+Pj4+Pj4gcmVm Y291bnRfaW5jKCkgYW5kIGZhbGxiYWNrIHRvIHJlZmNvdW50X3NldCgxKSB3aGVuCj4gPj4+Pj4+ IHJlZmNvdW50X2luY19ub3RfemVybygpIHJldHVybnMgZmFsc2UuIE5vdGUgdGhhdCB0aGlzIDIt c3RlcHMgb3BlcmF0aW9uCj4gPj4+Pj4+IGlzIG5vdCByYWN5IGhlcmUgYmVjYXVzZSB0aGUgd2hv bGUgc2VjdGlvbiBpcyBwcm90ZWN0ZWQgYnkgYSBtdXRleAo+ID4+Pj4+PiB3aGljaCBndWFyYW50 ZWVzIHRoYXQgdGhlIGNvdW50ZXIgZG9lcyBub3QgY2hhbmdlIGJldHdlZW4gdGhlCj4gPj4+Pj4+ IHJlZmNvdW50X2luY19ub3RfemVybygpIGFuZCByZWZjb3VudF9zZXQoKSBjYWxscy4gIAo+ID4+ Pj4+IElmIHdlJ3JlIG5vdCBmb2xsb3dpbmcgdGhlIG1vZGVsLCBhbmQgcHJvdGVjdGluZyB0aGUg cmVmY291bnQgYnkgYQo+ID4+Pj4+IG11dGV4LCBzaG91bGRuJ3Qgd2UganVzdCBiZSB1c2luZyBh ZGRpdGlvbiBhbmQgc3VidHJhY3Rpb24gaW5zdGVhZCBvZgo+ID4+Pj4+IHJlZmNvdW50J3MgYXRv bWljcz8gIAo+ID4+Pj4gQWN0dWFsbHksIHRoaXMgbXV0ZXggaXMgcHJvdGVjdGluZyB0aGUgYm8t Pm1hZHYgdmFsdWUgd2hpY2ggaGFzIHRvIGJlCj4gPj4+PiBjaGVja2VkIHdoZW4gdGhlIGNvdW50 ZXIgcmVhY2hlcyAwICh3aGVuIGRlY3JlbWVudGluZykgb3IgMSAod2hlbgo+ID4+Pj4gaW5jcmVt ZW50aW5nKS4gV2UganVzdCBiZW5lZml0IGZyb20gdGhpcyBwcm90ZWN0aW9uIGhlcmUsIGJ1dCBp ZGVhbGx5Cj4gPj4+PiBpdCB3b3VsZCBiZSBiZXR0ZXIgdG8gaGF2ZSBhbiByZWZjb3VudF9pbmNf YWxsb3dfemVybygpIGFzIHN1Z2dlc3RlZCBieQo+ID4+Pj4gRGFuaWVsLiAgCj4gPj4+IExldCBt ZSByZXN0YXRlIHRoaXMgdG8gc2VlIGlmIGl0IG1ha2VzIHNlbnNlOiBUaGUgcmVmY291bnQgaXMg YWx3YXlzID49Cj4gPj4+IDAsIHRoaXMgaXMgaXMgdGhlIG9ubHkgcGF0aCB0aGF0IGluY3JlYXNl cyB0aGUgcmVmY291bnQgZnJvbSAwIHRvIDEsIGFuZAo+ID4+PiBpdCdzIChpbmNpZGVudGFsbHkp IHByb3RlY3RlZCBieSBhIG11dGV4LCBzbyB0aGVyZSdzIG5vIHJhY2UgYmV0d2VlbiB0aGUKPiA+ Pj4gYXR0ZW1wdGVkIGluY3JlYXNlIGZyb20gbm9uemVybyBhbmQgdGhlIHNldCBmcm9tIG5vbnpl cm8gdG8gMS4gIAo+ID4+IFllcC4KPiA+PiAgCj4gPj4+IFRoaXMgc2VlbXMgZmluZSB0byBtZSBh cyBhIGJ1Z2ZpeC4gIAo+ID4+IFRoZSBkaXNjdXNzaW9uIGlzIGdvaW5nIG9uIGluIHRoZSBvdGhl ciB0aHJlYWQsIGxldCdzIHdhaXQgYSBiaXQKPiA+PiBiZWZvcmUgdGFraW5nIGEgZGVjaXNpb24u ICAKPiA+IExldCdzIG5vdCBibG9jayB0aGUgYnVnZml4IG9uIHJlYWNoaW5nIHBlcmZlY3Rpb24g aW1vLiBJJ2QgbWVyZ2UgdGhpcyBhcwo+ID4gdGhlIG1pbmltYWwgZml4LCBhbmQgdGhlbiBhcHBs eSB0aGUgcHJldHR5IHBhaW50IG9uY2Ugd2UgaGF2ZSBhIGNsZWFyIGlkZWEKPiA+IGZvciB0aGF0 Lgo+ID4gLURhbmllbCAgCj4gCj4gc29ycnkgYnV0IGkgY2FuJ3QgZmluZCBpdCBpbiB0aGUgRFJJ IHRyZWUuCgpTb3JyeSBmb3IgdGhlIGRlbGF5LiBJIGFwcGxpZWQgaXQgdGhpcyBtb3JuaW5nIFsx XSBhbmQgaXQgc2hvdWxkIGFwcGVhcgppbiB0aGUgbmV4dCAtcmMuCgpSZWdhcmRzLAoKQm9yaXMK ClsxXWh0dHBzOi8vY2dpdC5mcmVlZGVza3RvcC5vcmcvZHJtL2RybS1taXNjL2xvZy8/aD1kcm0t bWlzYy1maXhlcwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpkcmktZGV2ZWwgbWFpbGluZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcK aHR0cHM6Ly9saXN0cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK