1 files changed, 17 insertions, 0 deletions

diff --git a/arch/um/sys-x86/tls_64.c b/arch/um/sys-x86/tls_64.c
new file mode 100644
index 000000000000..f7ba46200ecd
--- /dev/null
+++ b/arch/um/sys-x86/tls_64.c
@@ -0,0 +1,17 @@
+#include "linux/sched.h"
+
+void clear_flushed_tls(struct task_struct *task)
+{
+}
+
+int arch_copy_tls(struct task_struct *t)
+{
+        /*
+         * If CLONE_SETTLS is set, we need to save the thread id
+         * (which is argument 5, child_tid, of clone) so it can be set
+         * during context switches.
+         */
+        t->thread.arch.fs = t->thread.regs.regs.gp[R8 / sizeof(long)];
+
+        return 0;
+}