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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-02-18 00:18:50 -0800
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-29 23:36:04 -0700
commitab2f75f0b760d2b0c9a875b669a1b51dce02c85a (patch)
tree9cc6bc284c111adcbb69aac51a6ccc639b5a22e2
parent252a6bf2a3a7e7add56b17d48aecf3f3ef213103 (diff)
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>
-rw-r--r--arch/x86/kernel/paravirt.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index bf2e86eee80..254e8aa8bfd 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)