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Commit 09a8dd77 authored by Guo Ren's avatar Guo Ren Committed by Greg Kroah-Hartman
Browse files

csky: Implement copy_thread_tls 



commit 0b9f386c4be6493d282aab0af6f9b70c62142777 upstream.

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: default avatarGuo Ren <guoren@linux.alibaba.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e28c9b3c

arch/csky/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ config CSKY 
	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

arch/csky/kernel/process.c

+4 −3
Original line number Diff line number Diff line
@@ -34,10 +34,11 @@ unsigned long thread_saved_pc(struct task_struct *tsk) 
	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);
@@ -64,7 +65,7 @@ int copy_thread(unsigned long clone_flags, 
			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;