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-rw-r--r--arch/nios2/Kconfig1
-rw-r--r--arch/nios2/kernel/entry.S7
-rw-r--r--arch/nios2/kernel/process.c23
3 files changed, 22 insertions, 9 deletions
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index c6645141bb2a..f9a05957a883 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -27,6 +27,7 @@ config NIOS2
select USB_ARCH_HAS_HCD if USB_SUPPORT
select CPU_NO_EFFICIENT_FFS
select MMU_GATHER_NO_RANGE if MMU
+ select HAVE_COPY_THREAD_TLS
config GENERIC_CSUM
def_bool y
diff --git a/arch/nios2/kernel/entry.S b/arch/nios2/kernel/entry.S
index 3d8d1d0bcb64..da8442450e46 100644
--- a/arch/nios2/kernel/entry.S
+++ b/arch/nios2/kernel/entry.S
@@ -389,12 +389,7 @@ ENTRY(ret_from_interrupt)
*/
ENTRY(sys_clone)
SAVE_SWITCH_STACK
- addi sp, sp, -4
- stw r7, 0(sp) /* Pass 5th arg thru stack */
- mov r7, r6 /* 4th arg is 3rd of clone() */
- mov r6, zero /* 3rd arg always 0 */
- call do_fork
- addi sp, sp, 4
+ call nios2_clone
RESTORE_SWITCH_STACK
ret
diff --git a/arch/nios2/kernel/process.c b/arch/nios2/kernel/process.c
index 509e7855e8dc..3dde4d6d8fbe 100644
--- a/arch/nios2/kernel/process.c
+++ b/arch/nios2/kernel/process.c
@@ -100,8 +100,8 @@ void flush_thread(void)
{
}
-int copy_thread(unsigned long clone_flags,
- unsigned long usp, unsigned long arg, struct task_struct *p)
+int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
+ unsigned long arg, struct task_struct *p, unsigned long tls)
{
struct pt_regs *childregs = task_pt_regs(p);
struct pt_regs *regs;
@@ -140,7 +140,7 @@ int copy_thread(unsigned long clone_flags,
/* Initialize tls register. */
if (clone_flags & CLONE_SETTLS)
- childstack->r23 = regs->r8;
+ childstack->r23 = tls;
return 0;
}
@@ -259,3 +259,20 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
{
return 0; /* Nios2 has no FPU and thus no FPU registers */
}
+
+asmlinkage int nios2_clone(unsigned long clone_flags, unsigned long newsp,
+ int __user *parent_tidptr, int __user *child_tidptr,
+ unsigned long tls)
+{
+ struct kernel_clone_args args = {
+ .flags = (lower_32_bits(clone_flags) & ~CSIGNAL),
+ .pidfd = parent_tidptr,
+ .child_tid = child_tidptr,
+ .parent_tid = parent_tidptr,
+ .exit_signal = (lower_32_bits(clone_flags) & CSIGNAL),
+ .stack = newsp,
+ .tls = tls,
+ };
+
+ return _do_fork(&args);
+}