int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
int ret;
*dst = *src;
if (fpu_allocated(&src->thread.fpu)) {
memset(&dst->thread.fpu, 0, sizeof(dst->thread.fpu));
ret = fpu_alloc(&dst->thread.fpu);
if (ret)
return ret;
fpu_copy(&dst->thread.fpu, &src->thread.fpu);
}
return 0;
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
int ret;
*dst = *src;
if (fpu_allocated(&src->thread.fpu)) {
memset(&dst->thread.fpu, 0, sizeof(dst->thread.fpu));
ret = fpu_alloc(&dst->thread.fpu);
if (ret)
return ret;
fpu_copy(&dst->thread.fpu, &src->thread.fpu);
}
#ifdef CONFIG_X86_EARLYMIC
if (dst->thread.fpu.state) {
/*
* No need to set this flag ? it should be inherited from the
* parent thread since the threadinfo is copied from the
* parent in setup_thread_stack()
*/
set_stopped_child_used_math(dst);
/*
* Simulate FPU DNA
* Undo the effects of unlazy_fpu in prepare_to_copy()
*/
preempt_disable();
clts();
#ifdef CONFIG_ML1OM
__math_state_restore();
#else
restore_mask_regs();
stts();
#endif
preempt_enable();
}
#endif
return 0;
}