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Diffstat (limited to 'arch/um/sys-x86_64/tls.c')
-rw-r--r--arch/um/sys-x86_64/tls.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/um/sys-x86_64/tls.c b/arch/um/sys-x86_64/tls.c
index ce1bf1b81c4..febbc94be25 100644
--- a/arch/um/sys-x86_64/tls.c
+++ b/arch/um/sys-x86_64/tls.c
@@ -1,14 +1,17 @@
#include "linux/sched.h"
-void debug_arch_force_load_TLS(void)
-{
-}
-
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.skas.regs[R8 / sizeof(long)];
+
return 0;
}