[PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu

There are two callers of __unlazy_fpu, unlazy_fpu and __switch_to, and
none of them appear to require additional preempt_disable/enable here.
Let's open-code save_init_fpu in __unlazy_fpu to save a few ops.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Andi Kleen <ak@suse.de>

include/asm-i386/i387.h

@@ -75,9 +75,10 @@ static inline void __save_init_fpu( struct task_struct *tsk )
 }
 
 #define __unlazy_fpu( tsk ) do {				\
-	if (task_thread_info(tsk)->status & TS_USEDFPU) \
-		save_init_fpu( tsk ); 			\
-	else						\
+	if (task_thread_info(tsk)->status & TS_USEDFPU) {	\
+		__save_init_fpu(tsk);				\
+		stts();						\
+	} else							\
 		tsk->fpu_counter = 0;				\
 } while (0)