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>

1 files changed, 4 insertions, 3 deletions

diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index ba713f166fa5..10be1dd01c6b 100644
--- 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)