#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void account_user_vtime(struct task_struct *);
extern void account_system_vtime(struct task_struct *);
-#else
-#define account_system_vtime(prev) do { } while (0)
#endif
-#define finish_arch_switch(rq, prev) do { \
+#define finish_arch_switch(prev) do { \
set_fs(current->thread.mm_segment); \
account_system_vtime(prev); \
} while (0)