[Mesa-dev] [Bug 94040] clGetPlatformIDs causes futex race condition

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94040

--- Comment #1 from bob at bob131.so ---
User-Agent:       Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:41.0)
Gecko/20100101 Firefox/41.0
Build Identifier: 

Apologies if I've mischaracterised anything above, I'm going off of my
uninformed analysis of the attached backtrace from GDB.

Attempting to use Blender in any meaningful way results in the UI hanging.
strace clued me into the blocking futex call and gdb seems to point the finger
at libOpenCL.so. 

Oddly enough, clinfo works as it should

Reproducible: Always

Steps to Reproduce:
1. Open Blender
2. Open system tab of preferences panel, switch to the Cycles renderer etc
Actual Results:  
UI freeze, application hang

Expected Results:  
Application doesn't hang

rpm -q fedora-release
fedora-release-23-0.17.noarch

rpm -q blender       
blender-2.75-4.fc23.x86_64

rpm -q ocl-icd
ocl-icd-2.2.7-2.git20150606.ebbc4c1.fc23.x86_64

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