powerpc: Make SPARSE_IRQ required

[cascardo/linux.git] / arch / powerpc / kernel / irq.c

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 701d4ac..9b6e806 100644 (file)
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -93,10 +93,6 @@ extern int tau_interrupts(int);
 
 #ifdef CONFIG_PPC64
 
-#ifndef CONFIG_SPARSE_IRQ
-EXPORT_SYMBOL(irq_desc);
-#endif
-
 int distribute_irqs = 1;
 
 static inline notrace unsigned long get_hard_enabled(void)
@@ -118,10 +114,14 @@ static inline notrace void set_soft_enabled(unsigned long enable)
 static inline notrace void decrementer_check_overflow(void)
 {
        u64 now = get_tb_or_rtc();
-       u64 *next_tb = &__get_cpu_var(decrementers_next_tb);
+       u64 *next_tb;
+
+       preempt_disable();
+       next_tb = &__get_cpu_var(decrementers_next_tb);
 
        if (now >= *next_tb)
                set_dec(1);
+       preempt_enable();
 }
 
 notrace void arch_local_irq_restore(unsigned long en)