diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 04c2807aab668e43a2a88ddbd781239456a5579c..e5f8f8eaf2258b38fc6e04866fc8b2afa5a64f1d 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -439,7 +439,7 @@ static inline fpu_switch_t switch_fpu_prepare(struct task_struct *old, struct ta
 
 	if (__thread_has_fpu(old)) {
 		if (!__save_init_fpu(old))
-			old->thread.fpu.last_cpu = ~0;
+			task_disable_lazy_fpu_restore(old);
 		else
 			old->thread.fpu.last_cpu = cpu;
 
@@ -455,7 +455,7 @@ static inline fpu_switch_t switch_fpu_prepare(struct task_struct *old, struct ta
 			stts();
 	} else {
 		old->thread.fpu_counter = 0;
-		old->thread.fpu.last_cpu = ~0;
+		task_disable_lazy_fpu_restore(old);
 		if (fpu.preload) {
 			new->thread.fpu_counter++;
 			if (!use_eager_fpu() && fpu_lazy_restore(new, cpu))
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index f3ced6f4b2b6f8f7d5e67b53658b603f58e20c76..5722ab6c7c3620fc6bef1971e90493e75ca85989 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -236,7 +236,7 @@ int init_fpu(struct task_struct *tsk)
 	if (tsk_used_math(tsk)) {
 		if (cpu_has_fpu && tsk == current)
 			unlazy_fpu(tsk);
-		tsk->thread.fpu.last_cpu = ~0;
+		task_disable_lazy_fpu_restore(tsk);
 		return 0;
 	}
 
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index e127ddaa2d5ad3e139ff7a99fb5485b43fb19416..ce8b10351e28e836804df37ad409f9ad6f7d9190 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -68,8 +68,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 
 	dst->thread.fpu_counter = 0;
 	dst->thread.fpu.has_fpu = 0;
-	dst->thread.fpu.last_cpu = ~0;
 	dst->thread.fpu.state = NULL;
+	task_disable_lazy_fpu_restore(dst);
 	if (tsk_used_math(src)) {
 		int err = fpu_alloc(&dst->thread.fpu);
 		if (err)