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linux/arch/x86/kernel/preempt.S

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sched, x86: Optimize the preempt_schedule() call Remove the bloat of the C calling convention out of the preempt_enable() sites by creating an ASM wrapper which allows us to do an asm("call ___preempt_schedule") instead. calling.h bits by Andi Kleen Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-tk7xdi1cvvxewixzke8t8le1@git.kernel.org [ Fixed build error. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-08-14 20:51:00 +08:00
#include <linux/linkage.h>
#include <asm/dwarf2.h>
#include <asm/asm.h>
#include <asm/calling.h>
ENTRY(___preempt_schedule)
CFI_STARTPROC
SAVE_ALL
call preempt_schedule
RESTORE_ALL
ret
CFI_ENDPROC
#ifdef CONFIG_CONTEXT_TRACKING
ENTRY(___preempt_schedule_context)
CFI_STARTPROC
SAVE_ALL
call preempt_schedule_context
RESTORE_ALL
ret
CFI_ENDPROC
#endif