static inline int restore_sigcontext_fpu()

in kernel/signal.c [25:52]

• 24 lines of code
• 3 McCabe index (conditional complexity)

static inline int restore_sigcontext_fpu(struct pt_regs *regs,
					 struct sigcontext __user *sc)
{
	struct task_struct *tsk = current;
	unsigned long used_math_flag;
	int ret = 0;

	clear_used_math();
	__get_user_error(used_math_flag, &sc->used_math_flag, ret);

	if (!used_math_flag)
		return 0;
	set_used_math();

#if IS_ENABLED(CONFIG_LAZY_FPU)
	preempt_disable();
	if (current == last_task_used_math) {
		last_task_used_math = NULL;
		disable_ptreg_fpu(regs);
	}
	preempt_enable();
#else
	clear_fpu(regs);
#endif

	return __copy_from_user(&tsk->thread.fpu, &sc->fpu,
				sizeof(struct fpu_struct));
}