sparc: Use the new genirq functionality

Make use of the new features in genirq:

1) Set the chip flag IRCHIP_EOI_IF_HANDLED, which ensures in the
   core code that irq_eoi() is only called when the interrupt was
   handled. That removes the extra status check in the callback.

2) Use the preflow handler, which is called from the fasteoi core code
   before the device handler. That avoids another status check and the
   open coded handler redirection.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: sparclinux@vger.kernel.org

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index f766e6bf370e..9efd30f6a1ed 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -52,6 +52,7 @@ config SPARC64
         select PERF_USE_VMALLOC
         select HAVE_GENERIC_HARDIRQS
         select GENERIC_HARDIRQS_NO_DEPRECATED
+        select IRQ_PREFLOW_FASTEOI
 
 config ARCH_DEFCONFIG
         string