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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-02-18 09:18:50 +0100 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2009-03-30 08:36:04 +0200 |
| commit | ab2f75f0b760d2b0c9a875b669a1b51dce02c85a (patch) | |
| tree | 9cc6bc284c111adcbb69aac51a6ccc639b5a22e2 /arch/x86/kernel/paravirt.c | |
| parent | mm: allow preemption in apply_to_pte_range (diff) | |
| download | linux-ab2f75f0b760d2b0c9a875b669a1b51dce02c85a.tar.xz linux-ab2f75f0b760d2b0c9a875b669a1b51dce02c85a.zip | |
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: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/kernel/paravirt.c')
| -rw-r--r-- | arch/x86/kernel/paravirt.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index bf2e86eee80c..254e8aa8bfdb 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -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) |