BMC/Intel-BMC/linux.git - Intel OpenBMC Linux kernel source tree (mirror)

Age	Commit message (Collapse)	Author	Files	Lines
2014-09-24	x86: Speed up ___preempt_schedule*() by using THUNK helpers	Oleg Nesterov	1	-25/+0
	___preempt_schedule() does SAVE_ALL/RESTORE_ALL but this is suboptimal, we do not need to save/restore the callee-saved register. And we already have arch/x86/lib/thunk_*.S which implements the similar asm wrappers, so it makes sense to redefine ___preempt_schedule() as "THUNK ..." and remove preempt.S altogether. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Andy Lutomirski <luto@amacapital.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20140921184153.GA23727@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-09-25	sched, x86: Optimize the preempt_schedule() call	Peter Zijlstra	1	-0/+25
	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>