There are still some distributions trying to support unfortunate people with old or exotic CPUs that don't have 64bit atomic operations. The only thing preventing compile of the Intel driver for them seems to be initialization of a debug variable.
It is very unlikely to be set simultaneously by multiple threads that somehow manage to change the environment variable without affecting each other, so just provide a thread-unsafe fallback. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93089 Signed-off-by: Grazvydas Ignotas <nota...@gmail.com> --- no commit access src/intel/common/gen_debug.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/intel/common/gen_debug.c b/src/intel/common/gen_debug.c index 858f04d..b206e8f 100644 --- a/src/intel/common/gen_debug.c +++ b/src/intel/common/gen_debug.c @@ -105,5 +105,10 @@ void brw_process_intel_debug_variable(void) { uint64_t intel_debug = parse_debug_string(getenv("INTEL_DEBUG"), debug_control); +#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 (void) p_atomic_cmpxchg(&INTEL_DEBUG, 0, intel_debug); +#else + if (!INTEL_DEBUG) + INTEL_DEBUG = intel_debug; +#endif } -- 2.7.4 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
