linux/arch/x86/kernel/preempt.S
Peter Zijlstra 1a338ac32c 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>
2013-09-25 14:23:07 +02:00

26 lines
368 B
ArmAsm

#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