Commit c41bf8fa authored May 02, 2007 by Jan Kiszka Committed by Andi Kleen May 02, 2007

[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>

parent 02b64dab

include/asm-i386/i387.h

+6 −5

Original line number	Diff line number	Diff line
		@@ -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)