[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()
IRQ_PER_CPU is not used by all architectures. This patch introduces the
macros ARCH_HAS_IRQ_PER_CPU and CHECK_IRQ_PER_CPU() to avoid the generation
of dead code in __do_IRQ().
ARCH_HAS_IRQ_PER_CPU is defined by architectures using IRQ_PER_CPU in their
include/asm_ARCH/irq.h file.
Through grepping the tree I found the following architectures currently use
IRQ_PER_CPU:
cris, ia64, ppc, ppc64 and parisc.
Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-ppc64/irq.h b/include/asm-ppc64/irq.h
index 570678b..99782af 100644
--- a/include/asm-ppc64/irq.h
+++ b/include/asm-ppc64/irq.h
@@ -33,6 +33,11 @@
#define IRQ_POLARITY_POSITIVE 0x2 /* high level or low->high edge */
#define IRQ_POLARITY_NEGATIVE 0x0 /* low level or high->low edge */
+/*
+ * IRQ line status macro IRQ_PER_CPU is used
+ */
+#define ARCH_HAS_IRQ_PER_CPU
+
#define get_irq_desc(irq) (&irq_desc[(irq)])
/* Define a way to iterate across irqs. */