[PATCH] s390: fix finish_arch_switch

Commit 4866cde0 requires finish_arch_switch
to have only one parameter instead of two.

Also fix another compile error (double declaration of account_system_vtime)
if CONFIG_VIRT_CPU_ACCOUNTING is not defined.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-s390/system.h

@@ -107,11 +107,9 @@ static inline void restore_access_regs(unsigned int *acrs)
 #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)