From c41bf8fa5e777b6a8a19cf2484937a7167eac77f Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Wed, 2 May 2007 19:27:21 +0200 Subject: [PATCH] [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 Signed-off-by: Andi Kleen --- include/asm-i386/i387.h | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/include/asm-i386/i387.h b/include/asm-i386/i387.h index 49dc8e141310..cdd1e248e3b4 100644 --- a/include/asm-i386/i387.h +++ b/include/asm-i386/i387.h @@ -74,11 +74,12 @@ static inline void __save_init_fpu( struct task_struct *tsk ) task_thread_info(tsk)->status &= ~TS_USEDFPU; } -#define __unlazy_fpu( tsk ) do { \ - if (task_thread_info(tsk)->status & TS_USEDFPU) \ - save_init_fpu( tsk ); \ - else \ - tsk->fpu_counter = 0; \ +#define __unlazy_fpu( tsk ) do { \ + if (task_thread_info(tsk)->status & TS_USEDFPU) { \ + __save_init_fpu(tsk); \ + stts(); \ + } else \ + tsk->fpu_counter = 0; \ } while (0) #define __clear_fpu( tsk ) \ -- 2.39.5