nouveau: make nouveau importing global buffers completely thread-safe, with tests
While I've closed off most races in a previous patch, a small race still existed
where importing then unreffing cound cause an invalid bo. Add a test for this case.
Racing sequence fixed:
- thread 1 releases bo, refcount drops to zero, blocks on acquiring nvdev->lock.
- thread 2 increases refcount to 1.
- thread 2 decreases refcount to zero, blocks on acquiring nvdev->lock.
At this point the 2 threads will clean up the same bo.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@ubuntu.com>
Reviewed-By: Emil Velikov <emil.l.velikov@gmail.com>
diff --git a/configure.ac b/configure.ac
index 437f4da..106d970 100644
--- a/configure.ac
+++ b/configure.ac
@@ -454,6 +454,7 @@
tests/vbltest/Makefile
tests/exynos/Makefile
tests/tegra/Makefile
+ tests/nouveau/Makefile
man/Makefile
libdrm.pc])
AC_OUTPUT