AcoSail/kernel_optimize_test
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x86/paravirt: use percpu_ rather than __get_cpu_var

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Impact: minor optimisation

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

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2009-02-18 00:18:50 -08:00
parent 252a6bf2a3
commit ab2f75f0b7
1 changed files with 5 additions and 5 deletions
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arch/x86/kernel/paravirt.c
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@ -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)
{
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)
{
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)
@ -294,7 +294,7 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
if (in_interrupt())
return PARAVIRT_LAZY_NONE;
return __get_cpu_var(paravirt_lazy_mode);
return percpu_read(paravirt_lazy_mode);
}
void arch_flush_lazy_mmu_mode(void)