csky: Implement copy_thread_tls
This is required for clone3 which passes the TLS value through a
struct rather than a register.
Cc: Amanieu d'Antras <amanieu@gmail.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 72b2999..047427f 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -36,6 +36,7 @@
select GX6605S_TIMER if CPU_CK610
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_AUDITSYSCALL
+ select HAVE_COPY_THREAD_TLS
select HAVE_DYNAMIC_FTRACE
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index 5349cd8..f7b231c 100644
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -40,10 +40,11 @@
return sw->r15;
}
-int copy_thread(unsigned long clone_flags,
+int copy_thread_tls(unsigned long clone_flags,
unsigned long usp,
unsigned long kthread_arg,
- struct task_struct *p)
+ struct task_struct *p,
+ unsigned long tls)
{
struct switch_stack *childstack;
struct pt_regs *childregs = task_pt_regs(p);
@@ -70,7 +71,7 @@
childregs->usp = usp;
if (clone_flags & CLONE_SETTLS)
task_thread_info(p)->tp_value = childregs->tls
- = childregs->regs[0];
+ = tls;
childregs->a0 = 0;
childstack->r15 = (unsigned long) ret_from_fork;
