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Commit ab2f75f0 authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge
Browse files

x86/paravirt: use percpu_ rather than __get_cpu_var 



Impact: minor optimisation

percpu_read/write is a slightly more direct way of getting
to percpu data.

Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
parent 252a6bf2

arch/x86/kernel/paravirt.c

+5 −5
Original line number Original line Diff line number Diff line
@@ -246,16 +246,16 @@ static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LA 




static inline void enter_lazy(enum paravirt_lazy_mode mode)

static inline void enter_lazy(enum paravirt_lazy_mode mode)

{

{

	BUG_ON(__get_cpu_var(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);

	BUG_ON(percpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);





	__get_cpu_var(paravirt_lazy_mode) = mode;

	percpu_write(paravirt_lazy_mode, mode);

}

}





static void leave_lazy(enum paravirt_lazy_mode mode)

static void leave_lazy(enum paravirt_lazy_mode mode)

{

{

	BUG_ON(__get_cpu_var(paravirt_lazy_mode) != mode);

	BUG_ON(percpu_read(paravirt_lazy_mode) != mode);





	__get_cpu_var(paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;

	percpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);

}

}





void paravirt_enter_lazy_mmu(void)

void paravirt_enter_lazy_mmu(void)
@@ -294,7 +294,7 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void) 
	if (in_interrupt())

	if (in_interrupt())

		return PARAVIRT_LAZY_NONE;

		return PARAVIRT_LAZY_NONE;





	return __get_cpu_var(paravirt_lazy_mode);

	return percpu_read(paravirt_lazy_mode);

}

}





void arch_flush_lazy_mmu_mode(void)

void arch_flush_lazy_mmu_mode(void)