powerpc: Access local paca after hard irq disabled

In hard_irq_disable(), we accessed the PACA before we hard disabled
the interrupts, potentially causing a warning as get_paca() will
us debug_smp_processor_id().

Move that to after the disabling, and also use local_paca directly
rather than get_paca() to avoid several redundant and useless checks.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index ba713f1..10be1dd 100644 (file)
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -96,10 +96,11 @@ static inline bool arch_irqs_disabled(void)
 #endif
 
 #define hard_irq_disable()     do {                    \
-       u8 _was_enabled = get_paca()->soft_enabled;     \
+       u8 _was_enabled;                                \
        __hard_irq_disable();                           \
-       get_paca()->soft_enabled = 0;                   \
-       get_paca()->irq_happened |= PACA_IRQ_HARD_DIS;  \
+       _was_enabled = local_paca->soft_enabled;        \
+       local_paca->soft_enabled = 0;                   \
+       local_paca->irq_happened |= PACA_IRQ_HARD_DIS;  \
        if (_was_enabled)                               \
                trace_hardirqs_off();                   \
 } while(0)