Threads work much better when you set the TLS register.
This was fixed in the upstream kernel for Linux 4.9.

Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 linux-user/openrisc/target_cpu.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/linux-user/openrisc/target_cpu.h b/linux-user/openrisc/target_cpu.h
index a21ed1a..f283d96 100644
--- a/linux-user/openrisc/target_cpu.h
+++ b/linux-user/openrisc/target_cpu.h
@@ -30,9 +30,7 @@ static inline void cpu_clone_regs(CPUOpenRISCState *env, target_ulong newsp)
 
 static inline void cpu_set_tls(CPUOpenRISCState *env, target_ulong newtls)
 {
-    /* Linux kernel 3.10 does not pay any attention to CLONE_SETTLS
-     * in copy_thread(), so QEMU need not do so either.
-     */
+    env->gpr[10] = newtls;
 }
 
 #endif
-- 
2.9.3